Approval Standard
for
Flexible Sprinkler Hose
With Threaded End Fittings
Class Number 1637
February 2010
Copyright © 2010 by FM Approvals LLC. All rights reserved.
Foreword
The FM Approvals certification mark is intended to verify that the products and services described will meet FM
Approvals’ stated conditions of performance, safety and quality useful to the ends of property conservation. The purpose
of Approval Standards is to present the criteria for FM Approval of various types of products and services, as guidance
for FM Approvals personnel, manufacturers, users and authorities having jurisdiction.
Products submitted for certification by FM Approvals shall demonstrate that they meet the intent of the Approval
Standard, and that quality control in manufacturing shall ensure a consistently uniform and reliable product. Approval
Standards strive to be performance-oriented. They are intended to facilitate technological development.
For examining equipment, materials and services, Approval Standards:
a)
must be useful to the ends of property conservation by preventing, limiting or not causing damage under
the conditions stated by the Approval listing; and
b) must be readily identifiable.
Continuance of Approval and listing depends on compliance with the Approval Agreement, satisfactory performance in
the field, on successful re-examinations of equipment, materials, and services as appropriate, and on periodic follow-up
audits of the manufacturing facility.
FM Approvals LLC reserves the right in its sole judgment to change or revise its standards, criteria, methods, or
procedures.
Table of Contents
1.
INTRODUCTION ................................................................................................................................................................1
1.1 PURPOSE .........................................................................................................................................................................1
1.2 SCOPE .............................................................................................................................................................................1
1.3 BASIS FOR REQUIREMENTS .............................................................................................................................................1
1.4 BASIS FOR APPROVAL.....................................................................................................................................................2
1.5 BASIS FOR CONTINUED APPROVAL .................................................................................................................................2
1.6 EFFECTIVE DATE ............................................................................................................................................................2
1.7 SYSTEM OF UNITS ...........................................................................................................................................................2
1.8 APPLICABLE DOCUMENTS ..............................................................................................................................................3
1.9 DEFINITIONS ...................................................................................................................................................................3
2.
GENERAL INFORMATION ...............................................................................................................................................5
2.1 PRODUCT INFORMATION .................................................................................................................................................5
2.2 APPROVAL APPLICATION REQUIREMENTS ......................................................................................................................5
2.3 REQUIREMENTS FOR SAMPLES FOR EXAMINATION .........................................................................................................5
3.
GENERAL REQUIREMENTS ............................................................................................................................................6
3.1 REVIEW OF DOCUMENTATION ........................................................................................................................................6
3.2 PHYSICAL OR STRUCTURAL FEATURES ...........................................................................................................................6
3.3 MATERIALS ....................................................................................................................................................................7
3.4 MARKINGS......................................................................................................................................................................7
3.5 MANUFACTURER'S INSTALLATION AND OPERATION INSTRUCTIONS...............................................................................7
3.6 CALIBRATION .................................................................................................................................................................8
3.7 TOLERANCES ..................................................................................................................................................................8
4.
PERFORMANCE REQUIREMENTS..................................................................................................................................8
4.1 EXAMINATION ................................................................................................................................................................8
4.2 FATIGUE .........................................................................................................................................................................8
4.3 VIBRATION .....................................................................................................................................................................9
4.4 PRESSURE CYCLING TEST .............................................................................................................................................10
4.5 VACUUM TEST ..............................................................................................................................................................11
4.6 FRICTION LOSS (EQUIVALENT LENGTH OF PIPE) ..........................................................................................................11
4.7 HYDROSTATIC STRENGTH ............................................................................................................................................12
4.8 SEAL INTEGRITY ...........................................................................................................................................................13
4.9 HIGH PRESSURE FLOW..................................................................................................................................................13
4.10 ELONGATION ................................................................................................................................................................14
4.11 ADDITIONAL TESTS ......................................................................................................................................................14
5.
OPERATIONS REQUIREMENTS ....................................................................................................................................14
5.1 DEMONSTRATED QUALITY CONTROL PROGRAM ..........................................................................................................14
5.2 FACILITIES AND PROCEDURES AUDIT (F&PA) .............................................................................................................16
5.3 MANUFACTURER'S RESPONSIBILITIES...........................................................................................................................16
5.4 MANUFACTURING AND PRODUCTION TESTS .................................................................................................................17
5.4.1 TEST REQUIREMENT - PRESSURE TEST......................................................................................................................17
5.4.2 TEST REQUIREMENT - VISUAL INSPECTION ...............................................................................................................17
5.5 WELDER TRAINING REQUIREMENTS .............................................................................................................................17
APPENDIX A: UNITS OF MEASUREMENT .................................................................................................................................18
APPENDIX B: FM APPROVALS CERTIFICATION MARKS ..........................................................................................................19
APPENDIX C: FIGURES ............................................................................................................................................................21
FIGURE C-1. TEST APPARATUS FOR FATIGUE TEST.............................................................................................................21
FIGURE C-2. TEST APPARATUS FOR MEASURING SPRINKLER NOMINAL K-FACTORS .........................................................22
FIGURE C-3. TEST APPARATUS WITH FLEXIBLE SPRINKLER HOSE WITH THREADED END FITTINGS FOR MEASURING
FRICTION LOSS (EQUIVALENT LENGTH OF PIPE) WITH ONE OR TWO BENDS ON THE HOSE......................................23
FIGURE C-4. TEST APPARATUS WITH FLEXIBLE SPRINKLER HOSE WITH THREADED END FITTINGS FOR MEASURING
FRICTION LOSS (EQUIVALENT LENGTH OF PIPE) WITH THREE OR FOUR BENDS ON THE HOSE .................................24
FIGURE C-5. TEST ARRANGEMENT FOR VIBRATION TEST ...................................................................................................25
FIGURE C-6. TEST ARRANGEMENT FOR PRESSURE CYCLING TEST .....................................................................................26
APPENDIX D: SAMPLE LISTING ...............................................................................................................................................27
APPENDIX E: TOLERANCES ......................................................................................................................................................28
1637
February 2010
1.
INTRODUCTION
1.1
Purpose
1.2
1.3
1.1.1
This standard states Approval criteria for flexible sprinkler hose with threaded end fittings for use in clean
rooms, commercial suspended ceilings, and ducts. Other applications shall be evaluated on a case-by-case
basis.
1.1.2
Approval criteria may include, but are not limited to, performance requirements, marking requirements,
examination of manufacturing facility(ies), audit of quality assurance procedures, and a follow-up program.
Scope
1.2.1
This standard encompasses the design and performance requirements for flexible sprinkler hose with threaded
end fittings for their intended application of connecting the sprinklers in a clean room, commercial suspended
ceiling, or duct to the sprinkler piping.
1.2.2
A commercial suspended ceiling is a type of ceiling used predominately in Light Hazard Occupancies. It is also
used less frequently in Ordinary Hazard Occupancies. A typical commercial suspended ceiling system is a “TBar Grid”. In a T-Bar Grid ceiling, a metal component with an inverted “T” cross-section is used to secure and
support acoustical lay-in panels.
1.2.3
Rigid furring channel is another type of commercial ceiling system.
1.2.4
Other applications shall be evaluated on a case-by-case basis. In cases where metric sized flexible sprinkler
hose with threaded end fittings are to be examined for Approval, test criteria comparable to the equivalent or
nearest nominal inch size shall be used.
1.2.5
Approval Standards are intended to verify that the product described will meet stated conditions of
performance, safety and quality useful to the ends of property conservation.
Basis for Requirements
1.3.1
The requirements of this standard are based on experience, research and testing, and/or the standards of other
organizations. The advice of manufacturers, users, trade associations, jurisdictions and/or loss control
specialists was also considered.
1.3.2
The requirements of this standard reflect tests and practices used to examine characteristics of flexible sprinkler
hose with threaded end fittings for the purpose of obtaining Approval. Flexible sprinkler hose with threaded
end fittings having characteristics not anticipated by this standard may be FM Approved if performance equal,
or superior, to that required by this standard is demonstrated, or if the intent of the standard is met.
Alternatively, flexible sprinkler hose with threaded end fittings which meet all of the requirements identified in
this standard may not be FM Approved if other conditions which adversely affect performance exist or if the
intent of this standard is not met.
FM APPROVALS 1
1637
1.4
February 2010
Basis for Approval
Approval is based upon satisfactory evaluation of the product and the manufacturer in the following major areas:
1.4.1
Examination and tests on production samples shall be performed to evaluate:
•
•
•
1.4.2
1.5
The suitability of the product;
The performance of the product as specified by the manufacturer and required by FM Approvals; and, as
far as practical,
The durability and reliability of the product.
An examination of the manufacturing facility(ies) and an audit of quality control procedures shall be made to
evaluate the manufacturer's ability to produce the product which was examined and tested, and the marking
procedures used to identify the product. These examinations and audits are repeated as part of FM Approvals'
product follow-up program.
Basis for Continued Approval
Continued Approval is based upon:
•
•
•
•
•
•
Production or availability of the product as currently FM Approved;
The continued use of acceptable quality assurance procedures;
Satisfactory field experience;
Compliance with the terms stipulated in the Master Agreement;
Satisfactory re-examination of production samples for continued conformity to requirements; and
Satisfactory Facilities and Procedures Audits (F&PA’s) conducted as part of FM Approvals’ product
follow-up program.
Also, as a condition of retaining Approval, manufacturers shall not change a product or service without prior
authorization by FM Approvals.
1.6
Effective Date
The effective date of an Approval Standard mandates that all products tested for Approval after the effective date shall
satisfy the requirements of that standard. Products FM Approved under a previous edition shall comply with the new
version by the effective date or forfeit Approval.
The effective date of this standard is (January 31, 2011) for compliance with all requirements.
1.7
System of Units
Units of measurement used in this standard are United States (U.S.) customary units. These are followed by their
arithmetic equivalents in International System (SI) units, enclosed in parentheses. The first value stated shall be regarded
as the requirement. The converted equivalent value may be approximate. Appendix A lists the selected units and
conversions to SI units for measures appearing in this standard. Conversion of U.S. customary units is in accordance
with the Institute of Electrical and Electronics Engineers (IEEE)/American Society for Testing and Materials (ASTM) SI
10-2002, American National Standard for Use of the International System of Units (SI): The Modern Metric System.
Two units (liter and bar), outside of, but accepted by, SI are commonly used in international fire protection and are used
in this standard.
FM APPROVALS 2
1637
1.8
February 2010
Applicable Documents
The following standards, test methods, and practices are referenced in this standard or are beneficial in understanding
this standard:
ANSI/ASME B1.20.1-1983 (R2006), Pipe Threads, General Purpose (Inch)
FM Global Property Loss Prevention Data Sheets
IEEE/ASTM SI 10-2002, American National Standard for Use of the International System of Units (SI): The
Modern Metric System
International Organization for Standardization (ISO) 7369 - 2004, Pipework - Metal Hoses and Hose Assemblies Vocabulary
ISO 10380 - 2003, Pipework -- Corrugated Metal Hoses and Hose Assemblies
ISO 17025 (2005), General Requirements for the Competence of Testing and Calibration Laboratories
1.9
Definitions
For purposes of this standard, the following terms apply:
Accepted
This term refers to installations acceptable to the authority enforcing the applicable installation rules (Authority
Having Jurisdiction). When the authority is FM Global, such locations are termed “FM Global Accepted.” Acceptance
is based upon an overall evaluation of the installation. Factors other than the use of FM Approved equipment impact
upon the decision to accept the product. Acceptance is not a characteristic of a product, it is installation specific. A
product accepted for one installation may thus not be acceptable elsewhere. (Contrast with FM Approved.)
Attachment
Method of joining end fittings to a flexible metal hose.
Braid
Tubular woven stocking of metal wires used to provide pressure strength and/or external protection.
Clean Rooms
A clean room is an enclosed space in which airborne particulates, contaminants, and pollutants are kept within strict
limits.
Corrosion Resistant
Flexible sprinkler hose with threaded end fittings shall be termed corrosion resistant if its interior surface exhibits
equivalent resistance to aqueous corrosion as steel pipe which is internally coated with zinc.
Corrugated Metal Hose
Pressure-tight hose with corrugations, helicoidally (formed or arranged in a spiral) or annular (formed in a ring) to the
axis of the hose. Made by deforming the metal, the corrugations provide flexibility.
Discharge Coefficient (K-Factor)
The coefficient of discharge as expressed in the equation:
Q
K = 1/ 2
p
Where Q is the flow in gallons per minute (gal/min), and P is the pressure in pounds per square inch (psi). Expressed
in SI units: Q is the flow in liters per minute (l/min) and P is the pressure in bar.
FM APPROVALS 3
1637
February 2010
End Connection
The fitting/component used to connect components of a pipe system or an individual sprinkler to the flexible sprinkler
hose with threaded end fittings.
End Fitting
Permanently attached fitting which allows metal hose to be connected to other components.
Flexibility
The capability of a metal hose to be repeatedly bent elastically during operation.
FM Approvals Certification Mark
The FM Approvals Certification Marks are detailed in Appendix B. Their use is mandatory on all units of FM
Approved flexible sprinkler hose with threaded end fittings. These registered marks cannot be used except as
authorized by FM Approvals via the granting of Approval to a specific product.
FM Approved
This term refers to products FM Approved by FM Approvals. Such products are listed in the Approval Guide, an
online resource of FM Approvals. All products so listed have been successfully examined by FM Approvals and their
manufacturers have signed and returned a Master Agreement to FM Approvals. This agreement obligates the
manufacturer to allow re-examination of the product and audit of facilities and procedures at the discretion of FM
Approvals. It further requires the manufacturer not to deviate from the as - FM Approved configuration of the product
without review by and agreement of FM Approvals. Approval is product specific.
Light Hazard Occupancy
An occupancy in which the quantity and/or combustibility of contents is low and fires with relatively low rates of heat
release are expected. Light Hazard Occupancies include occupancies having conditions similar to: apartments,
churches, clubs, eaves and overhangs (if combustible construction with no combustibles beneath), educational
facilities, hospitals, institutional facilities, libraries (except large stack rooms), museums, nursing or convalescent
homes, office (including data processing), residential facilities, restaurant seating areas, theaters and auditoriums
(excluding stages and prosceniums), and unused attics. Refer to the FM Global Property Loss Prevention Data Sheets
for more specific information.
Minimum Bend Radius
The minimum radius [expressed in inches (mm)], specified by the manufacturer, at which a hose is designed to
operate.
Metal Hose Assembly
Assembly of a metal hose with its end fittings.
Ordinary Hazard Occupancy
An occupancy where the quantity and combustibility of contents is greater than that of a Light Hazard Occupancy.
Refer to the FM Global Property Loss Prevention Data Sheets for more specific information.
Pendent Sprinkler
An automatic sprinkler designed such that the water exiting its orifice is directed downward against the deflector.
Rated Working Pressure
The maximum sustained pressure at which the flexible sprinkler hose with threaded end fittings may operate.
Sidewall Sprinkler
An automatic sprinkler intended for installation near a wall and ceiling interface and designed to discharge water
horizontally outward and onto adjacent walls.
Suspended Ceiling
A ceiling in which the main runners and cross furring are suspended below the structural members of the building.
FM APPROVALS 4
1637
February 2010
2.
GENERAL INFORMATION
2.1
Product Information
In order to meet the intent of this standard, flexible sprinkler hose with threaded end fittings shall be examined on a
model-by-model, type-by-type, manufacturer-by-manufacturer, and plant-by-plant basis. This is predicated on the basis
that identical designs, fabricated using identical materials by different manufacturers or, even by different plants of the
same manufacturer, have sometimes been shown to perform differently in testing. Sample hoses, selected in
conformance to this criterion, shall satisfy all of the requirements of this standard.
2.2
Approval Application Requirements
To apply for an Approval examination, the manufacturer, or their authorized representative, shall submit a request to:
Hydraulics Group Manager
FM Approvals Hydraulics Laboratory
743 Reynolds Road
West Glocester, RI 02814 U.S.A.
The manufacturer shall provide the following preliminary information with any request for Approval consideration:
x
x
x
x
x
x
A complete list of all models, types, sizes, and options for the products or services being submitted for Approval
consideration
The minimum bend radius of the flexible sprinkler hose
The type of application for the flexible sprinkler hose: clean room, commercial suspended ceiling or duct
General assembly drawings, one complete set of manufacturing drawings, materials list(s), anticipated marking
format, brochures, sales literature, specification sheets, installation, operation and maintenance procedures
All drawings are required to identify the manufacturer's name, document number, title, date of last revision, and
revision level
The number and location(s) of manufacturing facilities
All foreign language documents shall be provided with English translation.
2.3
Requirements for Samples for Examination
Following generation and authorization of an Approval examination, the manufacturer shall submit samples for
examination and testing. Sample requirements are determined by FM Approvals following review of the preliminary
information. Sample requirements may vary depending on design features, results of prior testing, and results of the
foregoing tests. It is the manufacturer’s responsibility to submit samples representative of production. Any decision to
use data generated utilizing prototypes is at the discretion of FM Approvals. The manufacturer shall provide any special
test fixtures which may be required to evaluate the flexible sprinkler hose with threaded end fittings.
FM APPROVALS 5
1637
February 2010
3.
GENERAL REQUIREMENTS
3.1
Review of Documentation
During the initial investigation and prior to physical testing, FM Approvals shall review the manufacturer's
specifications, technical data sheets, and design details to assess the ease and practicality of installation and use of the
flexible sprinkler hose with threaded end fittings. The product shall be capable of being used within the limits of the
Approval investigation.
3.2
Physical or Structural Features
3.2.1
Flexible sprinkler hose are for use in wet pipe and dry pipe systems.
3.2.2
Flexible sprinkler hoses with threaded end fittings shall be designed for a minimum rated working pressure of
175 psi (1205 kPa). Other pressures may be considered at the discretion of FM Approvals.
3.2.3
Flexible sprinkler hose with threaded end fittings covered by this standard shall be a nominal 3/4, 1, 1-1/4 or 11/2 in. diameter. The smallest inside diameter allowed for the flexible sprinkler hose is 0.75 inch (19.05 mm).
3.2.4
A flexible sprinkler hose assembly, including end connections, shall have a maximum length of 6 ft (1.8 m).
Both ends of the flexible sprinkler hose assembly shall come equipped with end connections.
3.2.5
All flexible sprinkler hoses shall have end connections such that they cannot be interconnected to create longer
lengths.
3.2.6
Flexible sprinkler hoses with threaded end fittings submitted for testing shall be true production samples and
shall be free of sharp edges, burrs, or other imperfections which might injure the installer or interfere with
proper assembly of the unit.
3.2.7
Threaded end fittings on flexible sprinkler hose shall be fabricated from metal.
3.2.8
Flexible sprinkler hoses with threaded end fittings shall have a stainless steel braided metallic outer jacket with
stainless steel internal bellows.
3.2.9
Non-metallic bellows are permitted but are restricted to Polytetrafluoroethylene (PTFE) convoluted hose, with
a minimum thickness of 0.039 in. (1 mm).
3.2.10
Technical data sheets shall be provided by all manufacturers.
3.2.11
All connections shall be suitable for use with fittings having tapered pipe threads which conform to a national
or internationally recognized standard. Sprinklers which are to be sold in the United States shall be threaded to
suit fittings manufactured in accordance with ANSI/ASME B1.20.1, Pipe Threads, General Purpose (Inch),
per Table 3.2.11.
Table 3.2.11. Threaded Connections
Nominal K-Factor
gal/min/(psi)1/2
5.6
8.0
11.2
14.0
16.8
19.6
22.4
25.2
U.S. Nominal Pipe Thread
Size (NPT), in.
1/2
1/2 or 3/4
1/2 or 3/4
3/4
3/4
1
1
1
FM APPROVALS 6
1637
3.2.12
3.3
February 2010
The automatic sprinklers listed in Table 3.2.11 are acceptable for use in flexible sprinkler hose, providing a
friction loss determination is conducted on each K-Factor and with a 1/2, 3/4 or 1 inch orifice size (See
Section 4.6).
Materials
All materials used in these hoses shall be suitable for the intended application. Hose parts exposed to water shall be
constructed of corrosion resistant materials. When non-standard or unusual materials are used, special tests may be
necessary to verify their suitability.
3.4
Markings
3.4.1
Each flexible sprinkler hose with threaded end fittings shall be permanently marked on its external surface with
the following information:
•
•
•
•
•
3.5
Manufacturer’s name or trademark;
Nominal size;
Rated working pressure;
Model designation; and
The FM Approvals Certification Mark.
3.4.2
Markings shall be cast or forged in raised characters, etched or die stamped on the fitting assembly.
3.4.3
A corrosion resistant metal nameplate or a corrosion resistant aluminum sticker bearing the same information
as stated above shall be considered acceptable if permanently fastened to the flexible hose or fitting assembly.
3.4.4
Other methods of applying permanent markings may be evaluated on a case-by-case basis.
3.4.5
Each required marking listed in Section 3.4.1 shall be legible and durable and applied in any of, or combination
of, the above methods.
3.4.6
The model or type identification shall correspond with the manufacturer's catalog designation and shall
uniquely identify the product as FM Approved. The manufacturer shall not place this model or type
identification on any other product unless covered by a separate agreement with FM Approvals.
3.4.7
The FM Approvals Certification Marks (see Appendix B) shall be displayed visibly and permanently on the
product. The manufacturer shall not use these marks on any other product unless such product is covered by
separate agreement with FM Approvals.
Manufacturer's Installation and Operation Instructions
Installation instructions, including any special dimension requirements and friction loss data, shall be furnished by the
manufacturer. Instructions shall be provided in each shipping container.
FM APPROVALS 7
1637
3.6
February 2010
Calibration
Each piece of equipment used to verify the test parameters shall be calibrated within an interval determined on the basis
of its stability, purpose, and usage. A copy of the calibration certificate for each piece of test equipment shall be
submitted to FM Approvals for its records. The certificate shall indicate that the calibration was performed against
working standards whose calibration is certified as traceable to the National Institute of Standards and Technology
(NIST) or traceable to other acceptable reference standards and certified by an ISO 17025 calibration laboratory. The
test equipment shall be clearly identified by label or sticker showing the last date of the calibration and the next due
date. A copy of the service accreditation certificate as an ISO 17025, "General Requirements for the Competence of
Testing and Calibration Laboratories", calibration laboratory is required for FM Approvals records.
The calibration of new equipment is also required. Documentation indicating either the date of purchase or date of
shipment, equipment description, and model and serial number is required for identification. The period from the time
the equipment was put into service to the date of testing must be within an interval that does not require the equipment
to be calibrated as determined on the basis of the parameters mentioned above. The new test equipment shall be clearly
identified by label or sticker showing the last date of the calibration and the next due date.
3.7
Tolerances
Tolerances on units of measure shall be as described in Appendix E, unless otherwise specified in this standard.
4.
PERFORMANCE REQUIREMENTS
4.1
Examination
4.1.1
Requirement
The flexible sprinkler hose with threaded end fittings shall conform to the manufacturer’s drawings and
specifications and to FM Approvals requirements.
4.1.2
Test/Verification
A sample shall be examined by FM Approvals and compared to drawings and specifications. It shall be verified
that the sample conforms to the physical and structural requirements described in Section 3, General
Requirements.
4.2
Fatigue
4.2.1
Requirement
Flexible sprinkler hose with threaded end fittings shall be subjected to 50,000 cycles of repeated flexing at a
rate of 5 cycles/minute to 15 cycles/minute in a direction parallel with the axis of the end fittings while
pressured to their rated working pressure. There shall be no deterioration of the flexible sprinkler hose or its
performance characteristics. Following the fatigue test, the flexible sprinkler hose with threaded end fittings
shall not leak or fail when tested in accordance with the hydrostatic test requirements in Section 4.7
(Hydrostatic Strength).
FM APPROVALS 8
1637
4.2.2
February 2010
Test/Verification
Prior to the fatigue test, the test assembly shall be filled with water and subjected to a hydrostatic strength test
to four times the rated working pressure, 700 psi (4825 kPa) minimum. The test shall be conducted for a
duration of five minutes. No leakage or rupture is allowed.
The fatigue test shall be conducted in a similar fashion to the “U-Bend” test referenced in ISO 10380, Pipework
-- Corrugated Metal Hoses and Hose Assemblies. A minimum of two samples of flexible sprinkler hose with
fittings, of the longest size submitted for Approval, shall be subjected to 50,000 cycles of repeated flexing at a
rate of 5 cycles/minute to 15 cycles/minute in a direction parallel with the axis of the end fittings while
pressurized to their rated working pressure, as shown in Figure C-1. The sample hose shall be mounted in a U
shape with the end fittings at a horizontal distance from each other of twice the minimum bend radius, r, of the
hose, as defined by the manufacturer’s literature. One end of the sample shall be held in a fixed position and the
other end shall be flexed in the vertical plane a distance of 4 times the nominal diameter of the sprinkler fittings
above and below the position of the fixed end for a total vertical movement of 8 times the nominal diameter.
After completion of 50,000 cycles, the samples shall be subjected to the hydrostatic post-test as detailed in
Section 4.7 (Hydrostatic Strength).
4.3
Vibration
4.3.1
Requirements
Flexible sprinkler hose with threaded end fittings and its attachment hardware shall be able to withstand the
effects of vibration without deterioration of their performance characteristics. Following the vibration test
detailed in Section 4.3.2, there shall be no deterioration of the sprinkler hose, its fittings or its attachment
hardware. Following exposure to the vibration test the flexible sprinkler hose with threaded end fittings shall
not leak when tested in accordance with Section 4.7 (Hydrostatic Strength).
4.3.2
Tests/Verification
4.3.2.1
A flexible sprinkler hose assembly, depending on intended installation application, shall be secured
to a vibration table with the outlet end fitting in a vertical plane and the hose bent in a 90° angle, at
its minimum bend radius, as defined by the manufacturer’s literature. The inlet of the flexible
sprinkler hose with threaded end fittings shall be securely fixed in a horizontal plane, as shown in
Figure C-5. The flexible hose shall be filled with water and pressurized to 90 psi (620 kPa) while
being subjected to the vibration conditions in Table 4.3.2.
Table 4.3.2 Vibration Conditions
Total Table Stroke
Frequency
in.
(mm)
Hz
0.020
(0.51)
28
0.040
(1.04)
28
0.150
(3.81)
28
0.040
(1.04)
18 to 37 variable
0.070
(1.78)
18 to 37 variable
4.3.2.2
Time
Hours
5
5
5
5
5
If the flexible sprinkler hose under examination is for use in ducts, a 12 inch (305 mm) long, 12 inch
(305 mm) diameter duct is secured to the vibration table. The outlet end of the flexible hose is
secured to the duct, and is placed in a vertical plane. The inlet end of the hose is bent in a 90° angle
at its minimum bend radius, as defined by the manufacturer’s literature, while the inlet is securely
fixed in the horizontal plane and vibration tested.
FM APPROVALS 9
1637
February 2010
4.3.2.3
If the flexible sprinkler hose under examination is for use in a cleanroom ceiling grid, a 15 inch
(380 mm) long cleanroom ceiling grid under examination is secured to the vibration table. The
outlet end of the flexible hose is secured in the ceiling grid. With the outlet end fitting in a vertical
plane, the hose is bent in a 90° angle at its minimum bend radius, as defined by the manufacturer’s
literature, and vibration tested.
4.3.2.4
If the flexible sprinkler hose under examination is for use in a commercial suspended ceiling
application, a 24 x 24 inch (610 x 610 mm) commercial ceiling frame assembly is secured to the
vibration table. The required bracket, screws and clamps for assembly in a commercial suspended
ceilings system are required to be submitted for the vibration test. The outlet end of the flexible hose
is secured in the ceiling assembly, and with the outlet end fitting in a vertical plane, the hose is bent
in a 90° angle at its minimum bend radius, as defined by the manufacturer’s literature, and vibration
tested.
4.3.2.5
During the vibration tests, acoustical lay-in ceiling panels are not required to be used in the metal
framing assembly, as the testing determines the integrity of the flexible sprinkler hose connected
with the associated hardware (brackets, clamps, screws, washers, lock washers etc), which the
manufacturer supplies for their specific application. Acoustical lay-in ceiling panels may be used
during the testing if deemed necessary by FM Approvals.
4.3.2.6
Vibration Test Requirements:
•
•
•
4.3.2.7
4.4
Commercial Suspended Ceiling: A vibration test is conducted on hose assemblies for use in a
commercial suspended ceiling. The required bracket, screws, clamps for assembly in a
commercial suspended ceilings system need to be submitted. A 2 x 2 ft (610 x 610 mm) ceiling
frame is required to be submitted for test.
Cleanroom Ceiling: A vibration test is conducted on hose assemblies for use in a cleanrooms. A
12 inch long cleanroom ceiling grid is required to be submitted for each cleanroom ceiling grid
submitted, and all screws to attach the grid to the hose assembly need to be submitted for test.
Duct: A vibration test is conducted on hose assemblies for use in ducts. A 12 inch diameter, 12
inch long duct, mounting block and all associated screws, and hardware is required to be
submitted for test.
After completion of the vibration test, the hose sample shall not leak or fail when tested in
accordance to the hydrostatic post-test as detailed in Section 4.7 (Hydrostatic Strength).
Pressure Cycling Test
4.4.1
Requirement
Flexible sprinkler hose with threaded end fittings shall withstand 20,000 cycles of varying pressure while bent
90º with the threaded end fittings restrained and the hose unrestrained on a flat surface. There shall be no
deterioration of the flexible sprinkler hose performance characteristics. Following the 20,000 cycles detailed in
Section 4.4.2, the flexible sprinkler hose with threaded end fittings shall not leak or fail when tested in
accordance with Section 4.7 (Hydrostatic Strength).
4.4.2
Test/Verification
4.4.2.1
Prior to cycling, the test assembly shall be filled with water and subjected to a hydrostatic strength
test equal to four times the rated working pressure, 700 psi (4825 kPa) minimum. The test shall be
conducted for a duration of five minutes. No leakage or rupture is allowed.
FM APPROVALS 10
1637
4.5
February 2010
4.4.2.2
The test sample shall be bent at a 90º angle, with the threaded end fittings restrained and the hose
unrestrained on a flat surface, at its minimum bend radius, as specified in the manufacturer’s
literature. The hose assembly shall then be subjected to 20,000 cycles of hydrostatic pressure
varying from 0 to 175 psi (0 to 1205 kPa) or its rated working pressure, whichever is greater, at a
rate of approximately 6 cycles per minute.
4.4.2.3
After completion of 20,000 cycles, the samples shall not leak or fail when subjected to the
hydrostatic post-test as detailed in Section 4.7 (Hydrostatic Strength).
Vacuum Test
4.5.1
Requirement
Flexible sprinkler hose with threaded end fittings shall withstand a vacuum of 26 in. Hg (0.88 bar) without
collapse, leakage or deterioration of the flexible sprinkler hose performance characteristics. Following the
vacuum test detailed in Section 4.5.2, there shall be no deterioration of its performance characteristics and the
flexible sprinkler hose with threaded end fittings shall not leak or fail when tested in accordance with Section
4.7 (Hydrostatic Strength).
4.5.2
4.6
Tests/Verification
4.5.2.1
One previously untested hose sample shall be subjected to a vacuum of 26 in. Hg (0.88 bar) for a
period of 5 minutes, during which time there shall be no collapse or leakage.
4.5.2.2
After completion of the vacuum test, the sample shall not leak or fail when subjected to the
hydrostatic post-test as detailed in Section 4.7 (Hydrostatic Strength).
Friction Loss (Equivalent Length of Pipe)
4.6.1
Requirements
To determine the effect of the flexible sprinkler hose with threaded end fittings on the hydraulic system, the
average friction loss through the flexible sprinkler hose with threaded end fittings shall be equated to the
theoretical length of nominal 1 in. diameter schedule 40 sprinkler pipe, with a C-factor of 120, which would
produce the same amount of friction loss. The results shall be listed in the Approval Guide, an online resource
of FM Approvals.
4.6.2
Test/Verification
To determine the friction loss of flexible sprinkler hose, flow measurements shall be taken at 5 gal/min.
(18.9 L/min.) increments from 25 gal/min. to 65 gal/min. (94.6 L/min. to 246 L/min.) on each hose length with
a sprinkler head threaded into the outlet of the test assembly. The sprinklers used for this test shall have
nominal discharge coefficients (K-factors) as listed in Table 4.6.1. Each flexible hose length shall be tested
with a requested nominal K-Factor sprinkler listed in Table 4.6.1. The sprinkler shall be attached to the hose,
and the hose shall be tested with its maximum number of bends, as shown in Table 4.6.2, but not to exceed the
minimum radius (see Figure C-3) as specified by the manufacturer’s literature. A series of flow versus pressure
drop (∆P) measurements shall be conducted to obtain the net friction loss across the hose. The average Cv
coefficient shall then be calculated using the formula Cv = Q/P1/2 where Q is the flow rate in gpm and ∆P is the
net friction loss in psi across the hose.
FM APPROVALS 11
1637
February 2010
Table 4.6.1 Nominal Discharge Coefficients (K-factors)
Nominal K-Factor
U.S. Nominal
Nominal K-Factor
Thread Size, in.
gal/min/(psi)1/2
dm3/min/(kPa)1/2
5.6
8.0
1/2
8.0
11.5
1/2 or 3/4
11.2
16.0
1/2 or 3/4
14.0
20.0
3/4
16.8
24
3/4
19
27
1
22
31.7
1
25.2
36.0
1
The testing of flexible sprinkler hose for Friction Loss determination shall be conducted to produce
reproducible and comparable test data. It is important that friction loss testing be standardized and that
comparative data between hoses with the same lengths from various manufacturers be available. Table 4.6.2
may be used as a guideline.
Table 4.6.2 Number of Bends
Flexible Sprinkler
Hose Lengths (m)
Number of Bends
Up to 2 ft
1
(0.61 m)
From 2 ft to 3 ft
2
(0.61 m to 0.91 m)
From 3 ft to 4 ft
3
(0.91 m to 1.21 m)
From 4 ft to 6 ft
4
(1.21 m to 1.81 m)
4.7
Hydrostatic Strength
4.7.1
Requirement
Flexible sprinkler hose with threaded end fittings shall withstand a hydrostatic pressure of four times the rated
working pressure without rupture, cracking, permanent distortion or deterioration of its performance
characteristics.
4.7.2
Test/Verification
Flexible sprinkler hose with threaded end fittings of each length shall be subjected to a hydrostatic pressure of
700 psi (4825 kPa) or four times the rated working pressure, whichever is greater, for five minutes. There shall
be no visible rupture, cracking, permanent distortion or any deterioration of hose performance as a result of this
test.
FM APPROVALS 12
1637
4.8
February 2010
Seal Integrity
4.8.1
Requirement
Flexible sprinkler hose with threaded end fittings that incorporate a sealing mechanism, such as o-rings or
gaskets, shall withstand an exposure to temperatures of -40ºF (-40ºC) [low temperature] and 275ºF (135ºC)
[high temperature] without cracking, leaking, permanent deformation or deterioration of the performance
characteristics of the seal.
4.8.2
Test/Verification
4.8.2.1
High Temperature Exposure
One sample of the flexible sprinkler hose with threaded end fittings and sealing mechanism, for
each sealing mechanism material under examination, shall be hydrostatically tested to confirm that
there is no leakage at the rated working pressure. Then the hose shall be drained and subjected to a
high temperature oven-air exposure of 275ºF (135ºC) for 45 days. After exposure, the hose shall be
allowed to cool to ambient air temperature. It shall then be pneumatically pressurized to 50 psi
(345 kPa) and submerged in water. No leakage shall occur. The sealing mechanism, after removal
from the hose, shall not crack when squeezed together from any two diametrically opposite points.
4.8.2.2
Low Temperature Exposure
One sample of the flexible sprinkler hose with threaded end fittings and sealing mechanism, for
each sealing mechanism material under examination, shall be hydrostatically tested to confirm that
there is no leakage at the rated working pressure. Then the hose shall be drained and subjected to a
low temperature exposure of -40ºF (-40ºC) for 4 days. Immediately after exposure, the hose shall be
submerged in an antifreeze solution at a temperature of -40ºF (-40ºC) and shall be pneumatically
pressurized to 50 psi (345 kPa). No leakage shall occur. The depressurized hose shall then be
allowed to warm to ambient temperature and disassembled. The sealing mechanism, after removal
from the hose, shall not crack when squeezed together from any two diametrically opposite points.
4.9
High Pressure Flow
4.9.1
Requirement
Flexible sprinkler hose with threaded end fittings attached to commercial suspended ceiling frame assemblies
shall be able to withstand the effects of a high pressure flow from an operated automatic sprinkler. Following
the high pressure flow test detailed in Section 4.9.2, there shall be no deterioration of the sprinkler hose, its
fittings or its attachment hardware.
4.9.2
Tests/Verification
A flexible sprinkler hose with threaded end fittings shall be fitted with a sprinkler and secured in a commercial
ceiling assembly. The sprinkler shall be operated using a suitable heat source and allowed to discharge for a
period of one minute. Five tests shall be conducted with pressures ranging from 40 psi to 175 psi (275 kPa to
1205 kPa) in approximately 35 psi (240 kPa) increments.
During and after the high pressure flow tests, the flexible sprinkler hose, fittings and attachment hardware shall
be examined for leakage, rupture and movement.
FM APPROVALS 13
1637
February 2010
4.10 Elongation
4.10.1
Requirement
The length of flexible sprinkler hose with threaded end fittings shall not exceed 101 percent of its unstressed
length after being subjected to a hydrostatic pressure equal to 1.5 times the rated working pressure.
4.10.2
Test/Verification
The length of a flexible sprinkler hose with threaded end fittings of the maximum length submitted for
Approval shall be placed in a straight assembly then measured and subjected to a hydrostatic pressure of
1.5 times the rated working pressure and held for 1 minute. After the 1 minute exposure, the test pressure shall
be released and the sample length shall be measured again and the length shall not exceed 101 percent of the
pre-test hose length.
4.11 Additional Tests
At the discretion of FM Approvals additional tests may be required, depending on design features, test results, or
material application, to verify the integrity and reliability of the hoses. Unexplainable failures shall not be permitted. A
re-test shall only be acceptable at the discretion of FM Approvals and with adequate technical justification of the
conditions and reasons for failure.
5.
OPERATIONS REQUIREMENTS
A quality control program is required to assure that subsequent flexible sprinkler hose with threaded end fittings produced by
the manufacturer at an authorized location shall demonstrate the same quality and reliability as the specific hoses examined.
Design quality, conformance to design, and performance are the areas of primary concern. Design quality is determined during
the Approval examination and tests, and is covered in the Approval Report. Conformance to design is verified by control of
quality and is covered in the Facilities and Procedures Audit (F&PA). Quality of performance is determined by field
performance and by periodic re-examination and testing.
5.1
Demonstrated Quality Control Program
5.1.1
The manufacturer shall demonstrate a quality assurance program which specifies controls for at least the
following areas:
•
•
•
•
•
•
•
•
•
Existence of corporate quality assurance guidelines;
Incoming quality assurance, including testing;
In-process quality assurance, including testing;
Welding Procedures and welder training;
Final inspection and tests;
Equipment calibration;
Drawing and change control;
Packaging and shipping; and,
Handling and disposition of discrepant materials.
In order to assure adequate traceability of materials and products, the manufacturer shall maintain records of all
quality control tests performed for a minimum period of two years from the date of manufacture of the flexible
sprinkler hose with threaded end fittings.
FM APPROVALS 14
1637
5.1.2
February 2010
Documentation/Manual
The manufacturer shall maintain an authoritative collection of quality procedures and policies. Such
documentation shall provide an accurate description of the quality management system while serving as a
permanent reference for implementation and maintenance of that system. The system should require that
sufficient records are maintained to demonstrate achievement of the required quality and to verify operation of
the quality system.
5.1.3
Drawing and Change Control
The manufacturer shall establish a system of product configuration control that shall allow no unauthorized
changes to the product. Revisions to critical documents, identified in the Approval Report, must be reported to,
and authorized by, FM Approvals prior to implementation in production. The manufacturer shall assign an
appropriate person or group to be responsible for reporting proposed revisions to FM Approved to FM
Approvals. In situations involving significant modifications to an Approved product, the notification shall be in
the form of a formal request for an Approval examination. For modifications of a more common nature, the
manufacturer shall provide notification to FM Approvals by means of FM Approvals Form 797, FM Approved
Product/Specification Tested Revision Request Form. Records of all revisions to all FM Approved products
shall be maintained.
5.1.3.1
The table below has been included as a guide to manufacturers of what is considered to be a
significant change to FM Approvals. As mentioned above, modifications that fit this category shall
be documented by means of a letter stating the change, and requesting a quotation for an Approval
examination.
Modification
Description/Example
Increase of Pressure Rating
The product was originally Approved for 175 psi (1205 kPa),
and now is to be evaluated to 300 psi (2070 kPa).
Different application
The product was Approved for commercial suspended ceiling,
clean rooms and or ducts, and now is to be evaluated for use in
different type of application.
Different clean room grid
The product was Approved for use with a particular clean
room ceiling grid, and now is to be evaluated for use in a
different type of ceiling grid.
Different type of
suspended ceiling
commercial The product was Approved for use in a “T-Grid” commercial
suspended ceiling, and now is to be evaluated for use in a
different type of ceiling system.
Addition of Product Sizes
The product was originally Approved for 1 inch NPS, and now
Approval of 3/4, 1-1/4 and or 1-1/2 inch NPS is desired.
Addition or Relocation of the The product was originally Approved in location A, and now is
Manufacturing Location
desired to be made in locations A and B, or only in location B.
Changes to Critical Material
Modifications that would depart from the national or
international standards that are used in the manufacturing of
the product as originally Approved.
Modifications that would have an effect on the use of the hose
with standardized fittings/couplings.
Modifications that would have an effect on the ability of the
product to maintain the same performance as the originally
Approved product. An example of this would be a reduction /
addition of wire braids.
FM APPROVALS 15
1637
February 2010
5.1.3.2
The table below has been included as a guide to manufacturers of modifications that are commonly
submitted on FM Approvals Form 797.
Modification
Change in
Information
5.1.3.3
5.2
5.3
Description/Example
Company
Contact Name, Title, Phone Number, Fax Number, Email Address,
Company Office Address, Company Name
Updating of Drawings
The Form 797 is used to notify FM Approvals in the event of:
minor dimensional changes to non-critical features, minor
changes in notes, location of title block, re-creation of the
same drawing on CAD, etc.
Changes in Markings
Please describe what changes are to be made and include a
drawing of the proposed marking.
Changes in Materials
Where new material is either superior, or comparable to
material used in original Approval
Updating of Documentation
Creation of New or Revisions to Sales literature, Installation
Instructions, Grooving Dimensions, Quality Manual, etc.
For the instances where the modification is difficult to categorize, manufacturers are encouraged to
contact FM Approvals to discuss the nature of the change, and inquire about how to send the
information to FM Approvals. The examples shown in Sections 5.1.3.1 and 5.1.3.2 are based on
common examples of modifications as they relate to the manufacture of flexible sprinkler hose.
Facilities and Procedures Audit (F&PA)
5.2.1
An audit of the manufacturing facility is part of the Approval investigation to verify implementation of the
quality control program. Its purpose is to confirm that the manufacturer's equipment, procedures, and quality
program are maintained to insure a consistently uniform and reliable product. Initial inspections of facilities
already producing similar FM Approved products may be waived at the discretion of FM Approvals.
5.2.2
Unannounced follow-up inspections shall be conducted at least annually by FM Approvals, or its designate, to
determine continued compliance. More frequent audits may be required by FM Approvals.
5.2.3
The manufacturer shall produce the product or service only at the location(s) audited by FM Approvals and as
specified in the Approval Report. Manufacture of products bearing the FM Approvals Certification Mark is not
permitted at any other locations without prior written authorization by FM Approvals.
Manufacturer's Responsibilities
The manufacturer shall notify and receive authorization from FM Approvals for changes in product construction, design,
components, raw materials, physical characteristics, coatings, component formulation or quality assurance procedures
prior to implementation of such changes.
FM APPROVALS 16
1637
5.4
February 2010
Manufacturing and Production Tests
5.4.1
Test Requirement - Pressure Test
The manufacturer shall hydrostatically test 100 percent of production flexible sprinkler hoses with threaded end
fittings for leakage at the rated working pressure. The minimum hydrostatic test duration shall be 30 seconds.
Alternately the manufacturer can pneumatically test 100 percent of production flexible sprinkler hoses with
threaded end fittings for leakage at one third the rated working pressure. The minimum test duration shall be
10 seconds.
5.4.2
Test Requirement - Visual Inspection
The manufacturer shall visually inspect 100 percent of production flexible sprinkler hoses with threaded end
fittings. This inspection shall verify that all hoses are free from visual defects (especially damaged hose braid or
threads).
5.5
Welder Training Requirements
The manufacturer shall train and maintain certified welders. The training records shall be maintained and available for
the auditor to review during the facility and procedure audit.
FM APPROVALS 17
1637
February 2010
APPENDIX A: Units of Measurement
Discharge Coefficient
(K-Factor):
gal/min/(psi)1/2 - "gallons per minute per square root of pounds per square inch"
(L/min/(bar)1/2 - "liters per minute per square root of bar")
L/min/(bar)1/2 = gal/min/(psi)1/2 x 14.414
(dm3/min/(kPa)1/2 - “cubic decimeters per minute per square root of kilopascal”)
dm3/min/(kPa)1/2 = gal/min/(psi)1/2 x 1.4414
Flow:
gal/min - “gallons per minute”; (L/min - “liters per minute”)
L/min = gal/min × 3.785
Frequency:
Length:
Hz - Hertz (Also the SI unit)
in. - “inches”; (mm - “millimeters”)
mm = in. x 25.4
ft - “feet”; (m - “meters”)
m = ft x 0.3048
Pressure:
psi - “pounds per square inch”; (kPa - “kilopascals”)
kPa = psi x 6.895
bar - “bar”; (kPa - “kilopascals”)
bar = kPa x 0.01
bar = psi x 0.06895
Temperature:
Vacuum:
°F-‘‘degrees Fahrenheit’’;(C-‘‘degrees Celsius’’)
°C=(°F -32) × 0.556
inHg - “inches of mercury”; (mmHg - “millimeters of mercury”)
mmHg = inHg x 25.4
inHg - “inches of mercury”; (bar - “bar”)
bar = inHg x 0.03386
Velocity:
ft/s - “feet per second”; (m/s - “meters/second”)
m/s = ft/s x 0.3048
FM APPROVALS 18
1637
February 2010
APPENDIX B: FM Approvals Certification Marks
FM Approvals certifications marks are to be used only in conjunction with products or services that have been FM Approved
by FM Approvals and in adherence with usage guidelines.
FM APPROVED mark:
Authorized by FM Approvals as a certification mark for any product that has been FM
Approved. There is no minimum size requirement for the mark, but it must be large enough to
be readily identifiable. The mark should be produced in black on a light background, or in
reverse on a dark background.
FM APPROVED mark with "C" only:
Authorized by FM Approvals as a certification mark for any product that has been evaluated
by FM Approvals in accordance with Canadian codes and standards. There is no minimum
size requirement for the mark, but it must be large enough to be readily identifiable. The mark
should be produced in black on a light background, or in reverse on a dark background.
FM APPROVED mark with "C" and "US":
Authorized by FM Approvals as a certification mark for any product that has been evaluated
by FM Approvals in accordance with US and Canadian codes and standards. There is no
minimum size requirement for the mark, but it must be large enough to be readily identifiable.
The mark should be produced in black on a light background, or in reverse on a dark
background.
Cast-On FM APPROVALS marks:
Where reproduction of the FM APPROVED mark described above is impossible because of
production restrictions, use these modified versions of the FM APPROVED mark. There is no
minimum size requirement for the mark, but it must be large enough to be readily identifiable.
Downloadable art and other FM Approvals resources are available by visiting our Web site at
www.fmapprovals.com
FM APPROVALS 19
1637
February 2010
FM Approvals Certification Marks
Usage Guidelines
y All FM Approvals certification marks are the sole
property of FM Approvals LLC (“FM Approvals”)
and are registered or the subject of applications for
registration in the United States and many other
countries. They are for use only according to these
guidelines.
y FM Approvals certification marks may be used
only on FM Approved products and related
product packaging, in advertising material,
catalogs and news releases. Use of FM Approvals
certification marks on such material is not a
substitute for use of the complete FM Approvals
certification mark on FM Approved products
and/or product packaging.
y No FM Approvals certification mark or aspect
thereof may be incorporated as part of a business
name, Internet domain name, or brand
name/trademark for products/product lines. This
includes both design aspects (the FM Approvals
“diamond,” etc.) and word aspects (“FM,”
“Approved,” etc.). The use of any FM Approvals
certification mark as a trademark is strictly
prohibited.
y The Approval Standard number or class number
may not be incorporated as part of a business
name, Internet domain name, or brand
name/trademark for products/product lines. For
example, a company may not say “ABC
Company’s 4100 Fire Door is FM Approved”; the
proper terminology is, “ABC Company’s Fire
Door is FM Approved per Approval Standard
4100.”
y FM Approvals certification marks, except for the
FM Approvals Quality System Registration mark,
may
not
be
used
on
business
stationery/cards/signage because this could
mischaracterize the relationship with FM
Approvals. Additionally, these items should not
reference any FM Approvals certification mark.
y Products or services may not be marketed under
any mark or name similar to “FM Global,” “FM
Approvals” or any of the FM Approvals
certification marks. Further, products or services
may not be marketed to imply a relationship
beyond the scope of any Approval made by FM
Approvals.
y When an FM Approvals certification mark is used
in advertising material or on product packaging,
all material must reflect the specific circumstances
under which the product was FM Approved. The
material must clearly differentiate between
products that are FM Approved and those that are
not, and may not, in any way, imply a more
substantial relationship with FM Approvals.
y A company may not reference the intent to submit
a product for Approval or the expectation that a
company will have a certain product FM
Approved in the future. For example, a company
may not state, “Approval by FM Approvals
pending” or “Approval by FM Approvals applied
for.”
y FM Approvals certification marks should not be
preceded or followed by a qualifier that indicates a
degree of certification or acceptability. For
example, “exceeds,” “first” or “only” may not be
used to qualify any FM Approvals certification
mark.
y Only original artwork issued by FM Approvals
should be used. The FM Approvals certification
marks should not be altered in any way other than
to
resize
the
artwork
proportionately.
Unacceptable uses of the marks include, but are
not limited to, adding/deleting wording or artwork,
reducing the artwork to an illegible size, animation
or distortion.
y The text of the FM Approvals certification marks
may not be translated into any language other than
English.
y FM Approvals certification marks must appear in
a size and location that is readily identifiable, but
less prominent than the name of the owner of the
certification or the manufacturer/seller/distributor
of the certified products.
FM APPROVALS 20
1637
February 2010
APPENDIX C: Figures
To Pump
Plug
Bracket
4x Hose Diameter
Bracket
Fixed
4x Hose Diameter
Minimum
Bend Radius
Air Operated
Piston
Pulse Meter
Counter
000000
Figure C-1. Test Apparatus for Fatigue Test
FM APPROVALS 21
1637
February 2010
Minimum 36 in.
12 in. ± 0.5 in
Gauge
6 in. Nominal
Pipe
Grooved
Coupling
(Typical)
A
Sprinkler
Butt
CL
Water
Source Inlet
Grooved
End Cap
(See Detail B)
A
CL
Piezometer
Ring
+0.125
1.125 -0.000 in.
Inlet of Tapped Hole
R0.50 in. ± 0.03 in.
Tangent to Hole
CL
CL
Internal Face
of End Cap
Section A-A
1/2 in., 3/4 in.
or 1 in. NPT
Tapped Hole
Detail B
Grooved End Cap
Cross-section
Note: All dimensions are nominal size unless otherwise indicated.
Radius on Inlet may be truncated on internal face.
Figure C-2. Test Apparatus for Measuring Sprinkler Nominal K-Factors
FM APPROVALS 22
1637
February 2010
12 in. (0.3 m) Length
of 1 in. NPS Pipe
Flexible Sprinkler
Hose with Fittings
Piezometer
Ring
Minimum
Bend
Radius
Piezometer
Ring
12 in. (0.3 m) Length
of 1 in. NPS Pipe
One Bend
Sprinkler
12 in. (0.3 m) Length
of 1 in. NPS Pipe
Flexible Sprinkler
Hose with Fittings
Minimum
Bend
Radius
Piezometer Sprinkler
Ring
12 in. (0.3 m) Length
of 1 in. NPS Pipe
Minimum
Bend
Radius
Piezometer
Ring
Two Bends
Note: All dimensions are nominal size
Figure C-3. Test Apparatus with Flexible Sprinkler Hose with Threaded End Fittings for Measuring
Friction Loss (Equivalent Length of Pipe) With One or Two Bends on the Hose
FM APPROVALS 23
1637
February 2010
Flexible Sprinkler
Hose with Fittings
12 in. (0.3 m) Length
of 1 in. NPS Pipe
Minimum
Bend
Radius
Minimum
Bend
Radius
Piezometer
Ring
Piezometer
Ring
12 in. (0.3 m) Length
of 1 in. NPS Pipe
Sprinkler
Three Bends
12 in. (0.3 m) Length
of 1 in. NPS Pipe
Piezometer
Ring
12 in. (0.3 m) Length
of 1 in. NPS Pipe
Flexible Sprinkler
Hose with Fittings
Minimum
Bend
Radius
Piezometer Sprinkler
Ring
Minimum
Bend
Radius
Minimum
Bend
Radius
Four Bends
Note: All dimensions are nominal size
Figure C-4. Test Apparatus with Flexible Sprinkler Hose with Threaded End Fittings for Measuring
Friction Loss (Equivalent Length of Pipe) With Three or Four Bends on the Hose
FM APPROVALS 24
1637
February 2010
Flexible Sprinkler
Hose with Fittings
Rigid
Support
Rated Working
Pressure
Minimum
Bend Radius
Mounting
Bracket
Mounting
Support
(Typical)
Cleanroom
Ceiling Grid
Vibration Table
Plug
Figure C-5. Test Arrangement for Vibration Test
FM APPROVALS 25
1637
February 2010
Rigid
Support
Flexible Sprinkler
Hose with Fittings
Rated Working
Pressure
Minimum
Bend Radius
Rigid
Support
Plug
Figure C-6. Test Arrangement for Pressure Cycling Test
FM APPROVALS 26
1637
February 2010
APPENDIX D: Sample Listing
Flexible Sprinkler Hose with Threaded End Fittings (1637)
* Fire Protection Division
* Automatic Sprinkler Systems
* Flexible Sprinkler Hose with Fittings
* For Cleanroom Ceilings
Flexible sprinkler hose with threaded end fittings are for use in cleanroom ceilings. The flexible hoses are to
be installed according to the manufacturer's directives. Unless indicated, the hoses have a rated working
pressure of 175 psi (1205 kPa).
* For Commercial Suspended Ceilings
Flexible sprinkler hose with threaded end fittings are for use in commercial suspended ceilings. The flexible
hoses are to be installed according to the manufacturer's directives. Unless indicated, the hoses have a rated
working pressure of 175 psi (1205 kPa).
* For Ducts
Flexible sprinkler hose with threaded end fittings are for use in ducts. The flexible hoses are to be installed
according to the manufacturer's directives. All of the models listed below are 1 in. nominal dia. flexible metal
sprinkler hose for providing a connection to automatic sprinklers in ducts. Approval is limited for use in ducts
only. Unless indicated, the hoses have a rated working pressure of 175 psi (1205 kPa).
PJC Company, 123 Any Street, Your Town, State, USA 01234
Model
PJC13
PJC16
PJC987
PJC9
Outlet size,
NPT (inch)
1/2
1/2
3/4
3/4
Hose assembly
length, ft
3
6
4
5
Maximum
Number of
90º bends
2
4
2
3
Minimum
Bend radius,
inch
6
7
8
6
Equivalent Length of 1 inch
schedule 40 pipe, (C=120)
ft
(m)
15
(4.6)
11
(3.3)
19
(5.8)
21
(6.4)
FM APPROVALS 27
1637
February 2010
APPENDIX E: Tolerances
Unless otherwise stated, the following tolerances shall apply:
Amps:
± 0.25 percent of value
Angle:
± 2°
Frequency (Hz):
± 5 percent of value
Length:
± 2 percent of value
Pressure:
Temperature:
Time:
Volume:
within + 5 (35 kPa)/- 0 psi (0 kPa) of value
± 4°F (2°C)
+ 5/-0 seconds
+ 0.1/-0 minutes
+ 0.1/-0 hours
+ 0.25/-0 days
± 5 percent of value
Unless stated otherwise, all tests other than operating tests shall be conducted at
a room (ambient) temperature of 68 °F ± 9 °F (20 °C ± 5 °C).
FM APPROVALS 28
Printed in USA