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DESIGN GENERAL SPECIFICATION
PIPE SUPPORTS
5
4
3
2
1
0
27/05/01
ALI A. FATTAH
JOHN DWYER
ABDUL AZIZ AL AMERI
ISSUED FOR IMPLEMENTATION
A
20/12/00
ALI A. FATTAH
JOHN DWYER
ABDUL AZIZ AL AMERI
ISSUED FOR COMMENTS
Rev
Date
DD/MM/YY
WRITTEN BY
CHECKED BY
APPROVED BY
STATUS
DOCUMENT REVISIONS
Sections changed in last revision are identified by a vertical line in the left margin
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CONTENTS
1.
GENERAL............................................................................................................................3
2
CODES AND STANDARDS ................................................................................................4
3.
REFERENCE DOCUMENTS ..............................................................................................4
4.
DOCUMENT PRECEDENCE..............................................................................................5
5.
SPECIFICATION DEVIATION/CONCESSION CONTROL ................................................6
6.
QUALITY ASSURANCE/QUALITY CONTROL .................................................................6
7.
SITE CONDITIONS.............................................................................................................7
8.
GENERAL DESIGN .............................................................................................................7
9.
PAINTING ..........................................................................................................................13
10.
HANDLING ........................................................................................................................13
11.
SUBCONTRACTORS/VENDORS .....................................................................................14
12.
DOCUMENTATION ...........................................................................................................14
13.
TESTING............................................................................................................................15
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1.
GENERAL
1.1
Introduction
This specification describes the minimum requirements for design, manufacture, testing,
supply the fabricated elements for support and control of piping systems and
components. The requirements outlined herein are supplementary to the Specification
Drawing Sheets. Together they comprise the specification for design, material selection,
fabrication, inspection and packaging for the following elements and their accessories:
Constant effort spring hangers and supports, variable spring hangers and supports, rod
hangers, pipe shoes, guides, anchors, clamps, axial restraints, three-way restraints, base
elbow supports, miscellaneous supports, struts, rollers, low friction slide supports or
special elements as identified by the specification drawing sheets.
1.2
Purpose
The purpose of this specification is to provide the VENDOR(S) the requirements for
furnishing the following pipe support elements: constant effort spring hangers and
supports, variable spring hangers, rod hangers, pipe shoes, guides, miscellaneous pipe
supports, struts, rollers, low friction slide supports or special elements as identified by the
Specification Drawing Sheets or Fabrication Detail Drawings.
This specification
supplements the Piping Standard Drawings STD-1300-001 and STD-1381-010 or the
Fabrication Detail Drawings.
1.3
Definitions
For the purposes of this specification, the following definitions shall apply:
1.3.1 COMPANY - ABU DHABI GAS INDUSTRIES LTD. (GASCO)
1.3.2 CONCESSION REQUEST - A deviation requested by the CONTRACTOR or VENDOR,
usually after receiving the contract package or purchase order. Often, it refers to an
authorization to use, repair, recondition, reclaim, or release materials, components or
equipment already in progress or completely manufactured but which does not meet or
comply with COMPANY requirements. A CONCESSION REQUEST is subject to
COMPANY/PMT approval.
1.3.3 CONTRACTOR – The party which carries out all or part of the Design, Engineering,
Procurement, Construction, Commissioning or Management of the Project.
1.3.4 SUBCONTRACTOR/SUBVENDOR - The party which carries out all or part of the design,
procurement, installation and testing of the system(s) as specified by the CONTRACTOR
/ VENDOR.
1.3.5 MANUFACTURER/VENDOR – The party which manufacturers and/or supplies equipment,
technical documents/drawings and services to perform the duties specified by
COMPANY/CONTRACTOR.
1.3.6 PROJECT – (To be defined )
1.3.7 PROJECT MANAGEMENT TEAM (PMT) - The COMPANY-authorised party responsible
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for the overall day-to-day execution of the Project. PMT is to serve as a liaison between
COMPANY and the CONTRACTOR(S) on the Project.
1.3.8 SHALL - Indicates a mandatory requirement.
1.3.9 SHOULD - Indicates a strong recommendation.
2.
CODES AND STANDARDS
The following codes and standards, to the extent specified herein, form a part of this
specification. When an edition date is not indicated for a code or standard, the latest
edition in force at the time of Contract award shall apply.
American Society of Mechanical Engineers (ASME)
ASME B31.1
Power piping
ASME B31.3
Process Piping
ASME B31.4
Pipeline Transportation Systems for Liquid Hydrocarbons and Other
Liquids
ASME B31.8
Gas Transmission and Distribution Piping Systems
Manufacturers Standardization Society of the Valve and Fittings Industry (MSS)
MSS SP-58
Pipe Hangers and Supports - Materials, Design and Manufacture
MSS SP-69
Pipe Hangers and Supports - Selection and Application
MSS SP-89
Pipe Hangers and Supports-Fabrication and Installation Practices
Pipe Fabrication Institute (PFI)
PFI ES-26
Welded Load Bearing Attachments to Pressure Retaining Piping
Materials.
International Organization for Standards (ISO)
ISO 9000
3.
Quality Load Bearing Attachments to Pressure Retaining Piping
Materials.
REFERENCE DOCUMENTS
The following reference documents, to the extent specified herein, form a part of this
specification. When an edition date is not indicated for a document, the latest edition in
force at the time of VENDOR’S proposal submittal shall apply.
Project Specifications :
DGS-1300-010
DGS-1300-070/FH
Technical Specification for Piping Systems
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4.
DGS-1300-185
Fabrication, Handling and Installation Process and
Utility Piping
DGS-1300-040
General Piping - Process and Utility Design Layout
and Drawings
DGS-1300-060
Piping Flexibility Analysis
DGS-1300-190
Traceability of Ship and Field Fabricated Piping
Materials
STD-1300-001
Piping Standard Drawings
DGS-6600-010
Painting
DGS-1300-175
Galvanising
DGS-6300-001
Welding, NDE and Prevention of Brittle Fracture of
Piping
DGS-6710-001
Preservation and Export Packing
DOCUMENT PRECEDENCE
It shall be the Vendor’s responsibility to be, or to become, knowledgeable of the
requirements of the referenced codes and Standards.
The VENDOR shall notify the CONTRACTOR of any apparent conflict between this
specification, the related specification/drawing sheets, the Codes and Standards and any
other specifications noted herein. Resolution and/or interpretation of precedence shall be
obtained from the CONTRACTOR in writing before proceeding with the
design/manufacture.
In case of conflict, the order of precedence shall be:
♦ Equipment Data Sheets(s)
♦ Equipment Narrative Specification
♦ Project Specifications and Standards
♦ Industry Codes and Standards
5.
SPECIFICATION DEVIATION/CONCESSION CONTROL
Any technical deviations to the Purchase Order and its attachments including, but not
limited to, the Specification/Drawing Sheets and Narrative Specifications shall be sought
by the VENDOR only through CONCESSION REQUEST format. CONCESSION
REQUESTS require CONRACTOR’S and COMPANY’S review/approval, prior to the
proposed technical changes being implemented. Technical changes implemented prior to
COMPANY approval are subject to rejection.
6.
QUALITY ASSURANCE/QUALITY CONTROL
CONTRACTOR Quality Management System shall comply with the applicable requirements
of ISO 9001 : 1994. The quality system shall provide for the planned and systematic control
of all quality-related activities performed during design. Implementation of the system shall be
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in accordance with the Project Agreement, CONTRACTOR’s Quality Manual and Project
Specific Quality plan, which shall both together with all related/referenced procedures, be
submitted to COMPANY for review, comments and approval. Quality Management System
shall comply with the applicable requirements of ISO 9001 : 1994.
If the VENDOR shall have in effect at all times, a QA/QC program which clearly
establishes the authority and responsibility of those responsible for the quality system.
Persons performing quality functions shall have sufficient and well defined authority to
enforce quality requirements that initiate, identify, recommend and provide solutioins to
quality problems and verify the effectiveness of the corrective action.
A copy of the VENDOR’S QA/QC program shall be submitted to the CONTRACTOR with
its quotation for CONTRACTOR’S review and concurrence prior to award.
If VENDOR’S QA/QC program and facility, where the work is to be performed, is ISO 9000
certified , then only a copy of the Vendor’s ISO 9000 certificate is required. In addition, if
VENDOR’S facility is ISO certified, CONTRACTOR’S QA audit requirements will be
waived in favor of ISO 9000 registrar audits, unless the CONTRACTOR’S trend analysis
program indicates areas of concern.
The VENDOR shall identify in purchase documents to its SUBVENDORS all applicable
QA/QC requirements imposed by the CONTRACTOR, and shall ensure compliance
thereto. On request, VENDOR shall provide objective evidence of its QA/QC surveillance
of its SUBVENDOR’S activities.
The VENDOR shall submit certified reports of production tests as soon as the tests are
completed satisfactorily.
The COMPANY/CONTRACTOR reserves the right to inspect materials and workmanship
at all stages of manufacture and to witness any or all tests. The VENDOR, 30 days after
award but prior to the pre-inspection meeting, shall provide the CONTRACTOR with a
copy of its Manufacturing and Inspection Plan for review and inclusion of any mandatory
COMPANY/CONTRACTOR witness points.
Vendor shall be required to furnish a production schedule indicating material allocated for
this project and fabrication/shipping progress for each assembly on a bi-weekly basis.
7.
SITE CONDITIONS
The following climatic conditions shall govern the design of the supports:
Temperature:
Relative Humidity:
Maximum in shade
Maximum in the sun
Minimum ambient
:
:
:
58oC
85oC
4oC
Maximum (at 43oC)
Average (at 28oC)
Design
:
:
:
95 percent
60 percent
100 percent
Rainfall is infrequent but may occur in winds up to 40 m/sec. Sandstorms are frequent and
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dust adheres to all exposed surfaces.
8.
GENERAL DESIGN
8.1
General Requirements
Pipe supports shall be designed, manufactured, fabricated, inspected and installed in
accordance with Codes and Standards listed in Section 2.0. Supports shall be
standardized as far as possible and bear an identification number. For special supports,
identification numbers shall include the unit and/or area number.
Special pipe support identification numbers shall be shown clearly on the Project Piping
Plan Drawings. For standard pipe supports only the symbol shall be shown.
Where Company specifications/Standards do not cover specific support details, Contractor
may submit is own Design for Company Review/Approval.
Piping shall be supported, anchored or guided to prevent line deflection, vibration
expansion and/or contraction which could result in stresses in excess of those permitted
by applicable ANSI/ASME codes. Each support assembly, including the spring supports,
shall be designed to support the hydrostatic test load.
The support should be designed to withstand the stresses at various operating scenarios
and at the surge conditions of the pipeline under all the feasible options.
All sliding supports shall be designed to permit free sliding movement in spite of
accumulated dust. Additionally preventive measure (shields) to be incorporated to alleviate
the dust ingress.
8.2
Allowable Stresses
Stress on all components shall be within the limits set by the applicable codes listed in
Section 2.0 of this specification.
Sufficient surface shall be supplied on beam connections so that the welds prescribed on
the specification drawings are adequate in accordance with the applicable codes listed in
Section 2.0.
In the event that there is a conflict between codes and/or specifications, the more stringent
shall be used for design.
Back-up calculations demonstrating compliance to stress limitations on engineered
components shall be made available to COMPANY for review. Appropriate stress
intensities and the basis for using particular intensities shall be part of the calculation.
8.3
Materials
Selection of material for the support and its component shall be governed by the design
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temperature of the line and the applicable codes listed in Section 2.0 of this specification
unless specific materials are indicated on the specification drawing and/or the fabrication
and installation drawing. All support material welded directly to the pipe shall be of the
same material as the pipe itself. The welded support or pads shall be stress relieved as
per service and code requirements.
Alloy steel pipe clamps shall be used for lines operating above 400°C, for lines operating
below -29°C killed steel shall be used, for lines operating below -45°C stainless steel shall
be used.
All contact areas shall be designed or arranged so that there is no electrolysis or galvanic
action.
All clamp halves shall be formed from continuous plate. Calculations shall be required for
deviations and submitted for review.
Pipe stanchions, pipe dummies and trunnions shall be made from the same type of
material as the connecting pipe. All other support material welded directly to the pipe shall
be of the same type of material as the pipe itself. Welding of supports on pipeline shall
require specific approval of COMPANY.
8.4
Welding
Welding procedures shall be submitted to the COMPANY for approval.
Load carrying welds shall be sized in accordance with PFI ES-26, Welded Load Bearing
Attachments to Pressure Retaining Piping Materials, and other applicable Codes and
Standards listed in Section 2.0 of this specification.
Weld-on support attachments, such as cradles or pipe stanchions, pipe dummies,
trunnions and lugs shall not be attached to tees, reducers and elbows. Where stress
analysis permits, pipe stanchions, pipe dummies and lugs may be attached to elbows.
Field welding for pipe support purposes shall not be performed on the following pipe
materials:
♦ Materials requiring post weld heat treatment
♦ Lined carbon steel
♦ Non-ferrous materials
For pipes requiring post-weld heat treatment, attachments required for supporting
purposes shall be indicated on piping drawings, and welding shall be executed at the pipe
shop before post-weld heat treatment.
8.5
Element Identification and Dimensions
Each assembly shall be packaged as a unit and identified with its own tag assembly
number as shown on its specification drawing and/or fabrication and installation drawing.
Tags shall be stainless steel having a minimum thickness of 0.38 mm (28 gauge) and shall
be securely attached to each item, with the exception of spring hangers, with a corrosion
resistant wire.
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Items which cannot be tagged by the above method, e.g., pipe shoes and guides, must be
marked on the surface on the item in such a way that field painting will not cause the
markings to be obscured or obliterated.
Spring hangers and spring supports shall have a stainless steel metallic nameplate tag
having a minimum thickness of 0.38 mm (28 gauge) permanently attached to the spring
housing by means of four stainless steel fasteners. This tag shall contain but not be limited
to the following data, all of which shall be clearly visible from a distance of 3 meters,
a. Spring scale including: load versus deflection N/mm, at 1 cm intervals
b. Tag assembly number
c. Hot load setting (N, operating) clearly marked by a raised element such as a rivet,
punched “H” letter painted red
d. Cold load setting (N, installed) clearly marked by a raised element such as a rivet,
punched “C letter” painted white.
e. Spring type, size and serial or figure number.
f.
MANUFACTURER’S name and address
g. Manufacturing date
h. Movement (mm) and direction (up or down)
i.
Spring Rate (N/mm)
Fabrication and installation dimensions shall be per the Specification Drawing Sheet and
in SI units as primary units.
Lugs or brackets used to support the hanger must be oriented to allow proper positioning
of the spring scale as noted on the Specification Drawing.
Base type spring supports shall be furnished with load flanges, extended load columns,
and slotted holes in the base support plate.
Turnbuckles on rod hanger assemblies shall be equipped with lock nuts on top and
bottom to prevent turning after field adjustment. Exposed threads of rods at turnbuckles
shall be coated with a suitable antisiege compound (MoS2) for easy adjustment in the
future.
The maximum variability for variable springs between installed and operating conditions
shall be limited to 25 percent as specified by MSS-SP58.
The design of Teflon Slide Plates shall have the following requirements:
a.
The upper slide plate shall be 3 mm thick, 304L stainless steel (square or
rectangular) attached to a structural member which completely covers the teflon
surface at all times to eliminate the possibility of cold flow, ridging, or damage to the
teflon surface.
b.
The finish on the upper stainless steel plate shall be per ASTM A 240 “Number 2B”
finish.
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8.6
c.
The lower slide plate shall be a 5 mm thick Teflon slide surface (square or
rectangular) not bonded but encased to a carbon steel lower plate (square or
rectangular) which will be stitch welded to the structural steel support. The lower
carbon steel plate shall be at least 20 mm larger on all sides than the Teflon slide
surface. Height of Teflon and carbon steel plate shall be 8 mm.
d.
Teflon shall withstand at least a design temperature of 204°C, a minimum design
loading of 3.45 N/mm2 and a static coefficient of friction less than 0.10.
e.
Provisions shall be made to insure that the upper stainless steel plate and the Teflon
surface are not painted.
Operation
Maximum deviation from spring rate for variable spring hangers as published in
VENDOR’S Catalogue must not exceed ten percent (10%) on either the heavy or the light
side.
Variable and constant spring hangers shall be calibrated, tested and present so that the
marked operating load is within two percent (2%) of the load shown on the hanger drawing
after the prescribed movement.
Constant spring hangers must have a field load adjustment of at least 10% on either side
of the operating hot load setting.
Hanger assemblies shall be capable of deflecting 4° minimum from vertical position
between pivot points with no appreciable effect of the operational function of the
assembly.
Travel stops shall be supplied with each spring hanger assembly. The travel stops, presetting the spring at the installation load, shall restrict both upward and downward
movement; however, the hydrotest stops shall not restrict the adjustment of the spring
assembly while the stops are in place. These stops are to have a red warning tag. This
tag shall have a warning note, as taken from the Specification Drawing, indicating when
the stops are to be removed.
Travel stops must be securely linked to the spring housing when they are not in use.
Attachments must be designed so that the stops are not easily discarded. A light chain
welded to the hanger housing and travel stop is recommended. Securing stops with a
wire is not permissible.
Spring support assembly shall be designed to withstand the static load of the hydrostatic
test. A limit stop device shall be provided for hydrotest purpose when specified in the
spring schedule (if not initially on the support).
Beams supplied by the VENDOR in spring hanger assemblies shall be designed so there
is a maximum of one and a half millimetres (1.5 mm) deflection for the maximum load
indicated on the Specification Drawing Sheet.
Spring hanger assemblies and engineered rod hangers do not include weights or riser
clamps, spring housing, rods, pipe clamps or connecting beams in the design loads shown
on the Specification Drawing Sheets. VENDOR shall adjust calculated loads to
accommodate this additional weight. This new calculated load shall be indicated on the
VENDOR’S bill of materials.
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All components must be compatible for assembly and erection without field modifications.
Modifications required in the field due to non compliance for correct fit up shall be grounds
for back charges.
Where bands are used to retain travel stops, the band shall be made of steel and located
in a position that does not obscure the load markers.
8.7
Pipe Guides
Expansion Loop Guides on two-phase flow process lines and flare lines shall be of the
goal post type. Welded guides and other welded support elements in hot dip galvanized
steel structures such as pipe racks shall be attached to steel members before they are hot
dip galvanized.
CONTRACTOR shall ensure guides in pipe systems with clamped cradles or pipe shoes
guide the pipe instead of the cradle or pipe shoe. If guiding of clamped cradles or pipe
shoes is unavoidable, precautions shall be taken to prevent rotation of the cradles or pipe
shoes.
Pipe Stanchions, pipe dummies and trunnions shall have welded end plates. Before the
end plates are welded, the inside of the pipe stanchions, pipe dummies and trunnions
shall be spray painted.
Pipe Stanchions shall not be used as a sliding support.
8.8
Pipe Clamps
Alloy steel pipe clamps shall be used for lines operating above 400°C for lines operating
below -29°C killed steel shall be used, for lines operating below -45°C stainless steel shall
be used.
All contact areas shall be designed or arranged so that there is no electrolysis or galvanic
action.
All clamp halves shall be formed from continuous plate. Calculations shall be required for
deviations and submitted for review. All welds must be 100 percent radiographed.
8.9
Large Pipe Diameters
Saddle-type supports with pads shall be provided for 26 inch NPS and larger.
8.10
Teflon Slide Plates
The upper slide plate shall be 3 mm thick, 304L stainless steel (square or rectangular)
attached to a structural member which completely covers the Teflon at all times to
eliminate the possibility of cold flow, ridging, or damaging to the Teflon surface.
The finish on the upper stainless steel plate shall be per ASTM A 240 “Number 2B” finish.
The lower slide plate shall be a 5 mm thick Teflon slide surface (square or rectangular) not
bonded but encased to a carbon steel lower plate (square or rectangular) which will be
stitch welded to the structural steel support. The lower carbon steel plate shall be at least
20 mm larger on all sides than the Teflon slide surface. Height of Teflon and carbon steel
plate shall be 8 mm..
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Teflon shall withstand a design temperature of at least 204°C, a minimum design loading
of 3.45 N/mm2 and a static coefficient of friction less than 0.10.
Provisions shall be made to insure that the upper stainless steel plate and the Teflon
surface are not painted.
In case the bearing temperature exceeds the allowable temperature as recommended by
the supplier then a thermal insulator should be fitted between the structure and bearing
back plate.
The Teflon slide plates shall be bought along with the Bearing Back plate from approved
suppliers and no “Site Bonding” shall be allowed.
Stitch welding of the bearing back plate should be sequenced in such a way that the HAZ
do not affect the “Teflon” plate embedded into it.
8.11
Corrosion Control
All spring hanger components and spring supports, with the exception of the spring coil,
alloy or stainless steel shall be galvanized. Galvanizing shall be in accordance with Project
Specificaiton DGS-1300-175
Spring coils shall be neoprene coated with a minimum thickness of 0,15 mm.
Galvanized spring hanger housings shall not be welded after the coil has been installed.
Retainers for the coil shall be of a bolted or split ring type construction to avoid burning the
housing.
9.
PAINTING
The CONTRACTOR shall perform surface preparation and priming only, in accordance
with applicable Project Painting Specification DGS-6600-010.
All cut square edges shall be radiused by grinding to ensure good painting.
10.
10.1
HANDLING
Packaging and Shipping
Preparation for shipment shall be in accordance with the Project Specification DGS-6710001, VENDOR standards and as noted herein. VENDOR shall be solely responsible for
the adequacy of the preparation for shipment provisions with respect to materials and
application, and to provide equipment at the destination in ex-works condition when
handled by commercial carriers.
Adequate protection shall be provided to prevent mechanical damage and atmospheric
corrosion in transit and at the job site.
Preparation for shipment and packing shall be subject to inspection and rejection by
COMPANY’S / CONTRACTOR’S inspectors. All costs occasioned by such rejection shall
be to the account of the VENDOR.
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10.1.1
Assembly of Materials
Each assembly of spring hangers, rod hangers, miscellaneous supports (made up of two
or more components) shall be completely preassembled and packaged as an individual
unit except for 12 inch NPS and larger pipe clamps. These may be reversed and securely
wired or banded each to its corresponding rod to accommodate bundling or boxing. All
items shall be preassembled, each with its respective bolts, nuts, lugs, turnbuckles,
clevises, etc. There are to be no loose pieces.
Single items such as pipe shoes may be properly boxed and/or crated and shipped as
bulk items.
10.1.2
Tagging and Boxing
Each assembly shall be identified with its own tag assembly number, as indicated on the
specification drawing sheet.
A copy of the CONTRACTOR’S specification drawing or fabrication and installation
drawing and the manufacturer’s installation instructions, which is to include a copy of the
bill of materials, in addition to the standard packing list, shall be inserted in a sealed plastic
envelope and securely attached to its respective assembly.
All components required for completion of any assembly must be shipped together in the
same package/crate by the VENDOR. Each package/crate shall have a packing list
attached to the outside. Partial component shipment of an assembly will not be
acceptable; however, partial shipment of completed assemblies, on a large order is
acceptable and encouraged.
Where practical, material shall be palletized with a gross weight not to exceed 1000 kgf.
10.2
Preservation and Storage
Preservation shall be in accordance with Project Specification DGS-6710-001. Pipe
support elements, shall be protected to withstand ocean transit and extended period of
storage at the jobsite for a minimum period of 18 months. Support elements shall be
protected against all adverse environments, such as : humidity, moisture, rain dust, dirt,
sand, mud, salt air, salt spray, and sea water.
11.
SUBCONTRACTORS/SUBVENDORS
The VENDOR shall assume unit responsibility and overall guarantee for the equipment
package and associated equipment. The VENDOR shall transmit all relevant purchase
order
documents
including
specifications
to
his
SUBVENDORS
and
SUBCONTRACTORS.
It is the VENDOR’S responsibility to enforce all Purchase Order documents including
specifications to his SUBVENDORS and SCUBCONTRACTORS.
The VENDOR shall submit all relevant SUBVENDOR and SUBCONTRACTOR drawings
and Engineering data to the CONTRACTOR.
The Vendor shall obtain and transmit all SUBVENDOR and SUBCONTRACTOR
warranties to the CONTRACTOR/COMPANY, in addition to the system warranty.
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12.
DOCUMENTATION
VENDOR shall submit the type and quantity of drawings and documentation for
CONTRACTOR’S authorisation or information as listed in the individual Material
Requisitions and Purchase Orders.
Mutual agreement on scheduled submittal of drawings and engineering data shall be an
integral part of any formal Purchase Order.
Comments made by CONTRACTOR on drawing submittal shall not relieve VENDOR or
SUBVENDORS of any responsibility in meeting the requirements of the specifications.
Such comments shall not be construed as permission to deviate from requirements of the
Purchase Order unless specific and mutual agreement is reached and confirmed in
writing.
♦ For slide bearing assemblies all “type test” certification shall be furnished to Company
♦ In case of prefabricated Teflon plates Peel-off test certificates shall be furnished in
accordance with ISO 9000.
Each drawing shall be provided with a title block in the bottom right-hand corner
incorporating the following information:
♦ Official trade name of the VENDOR.
♦ VENDOR’S drawing number.
♦ Drawing title giving the description of contents whereby the drawing can be identified.
♦ A symbol or letter indicating the latest issue or revision.
♦ Purchase order number and item tag numbers.
Revisions to drawing shall be identified with symbols adjacent to the alterations, a brief
description in tabular form of each revision shall be given, and if applicable, the authority
and date of the revision shall be listed. The term "Latest Revision" shall not be used.
13.
TESTING
13.1 Special engineered pipesupports which require welding for assembly shall have a random
5% of all welds radiographed. Special engineered pipesupports are defined as nonstandard, or not catalogued items from the VENDOR(S). Spring can assemblies (variable
and constant) they are standard catalogued items are not considered special engineered
pipe supports.
13.2 All components shall be visually inspected to the requirements of MSS SP-58 and SP-69.
13.3 Each constant support hanger assembly shall be individually calibrated prior to shipment
to support the specified loads stated on the sping hanger data sheets. The calibration
records shall be forwarded to the CONTRACTOR.
13.4 All alloy springs shall shot peened and examined by magnetic particle.
13.5 The spring rate tolerence shall bne tested within plus or minus 5 % . Each spring coil shall
betested for free height, spring rate and loaded height. These testing records and C.M.T.R
for the raw spring coil material shall be forwarded to the CONTRACTOR.
DGS-1300-070/FH