Gerencia Técnica
Departamento de Ingeniería y Obras
INT ET 045/2006
BLOCK VALVES
TECHNICAL SPECIFICATION
REV.
FECHA
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DESCRIPCION
PREPARADO
POR
APROBADO
POR
Blok Valves
Tecnical Specification
INT ET 045/06
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INDICE DE REVISIONES
PÁGINA
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REVISIÓN
FECHA
Blok Valves
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INT ET 045/06
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INDEX
Page.
1.
SCOPE ........................................................................................................... 4
2.
APPLICABLE CODES AND STANDARDS ............................................... 4
3.
VALVES GENERAL CHARACTERISTICS ............................................... 4
4.
ACTUATORS CHARACTERISTICS .......................................................... 5
5.
ACCESSORIES CHARACTERISTICS ....................................................... 6
6.
SPARE PARTS .............................................................................................. 7
7.
DATA SHEETS. ............................................................................................ 7
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1. SCOPE
This Technical Specification establishes the general requirements for the supply of block valves.
2. APPLICABLE CODES AND STANDARDS
Whenever applicable, the last edition of the following codes and standards will be considered:
 ASTM - American Society for Testing and Materials
 MSS - Manufacturers Standardization Society of the Valve and Fittings Industry
 ANSI - American National Standard Institute
ANSI B1.1
Nuts and stud bolts for process equipment.
ANSI B1.20.1
Connection threads (NPT).
ANSI B16.5
Flanged connections.
ANSI B16.10
Dimensions between valve ends.
ANSI B16.34
Valves with flanged, threaded and welded ends.
 ISA - Instrument Society of America
ISA RP550
I-6 Installation Manual.
ISA RP 12.1
Electrical Instrument in Hazardous Area Classification
 NEMA - National Electrical Manufacturers Association
 AISI - American Iron and Steel Institute
 ASME - American Society of Mechanical Engineers
 API - American Petroleum Institute
API Std 607
FIRE SAFE design for ball valves.
API RP6F
FIRE SAFE valves test.
API RP551
Section 6 .Process and Environmental protection
 FM - Factory Mutual System
FM 6033
FIRE SAFE valves acceptance procedures.
 SAE - Society of Automotive Engineers
 NFPA – National Fire Protection Association
3. VALVES GENERAL CHARACTERISTICS
A. Whenever possible, valves will be the manufacturer standard provided they meet this
specification requirements.
B. Neither welded bodies, nor welded connections will be accepted.
C. Valves dimensions will be according to the referred standards.
D. Valves bodies will have an arrow showing the flow direction. This arrow will be stamped on the
valve body.
E. Valves bodies will support as a minimum the maximum pressure and temperatures determined
by the rating and material specified and the corresponding hydraulic test.
F. The specified materials will meet the composition and characteristics corresponding to the
detailed ASTM or AISI description, or the standard characteristics and composition of the
materials described by their commercial names.
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G. Vendor standard quality materials will be used for parts, actuators and accessories not detailed in
this specification, according with the other specified materials and the process conditions.
H. Nuts, stud bolts and bolts linking parts under pressure (ex. body, bonnet) will use the indicated
quality materials or better, depending on the valve body material:
For carbon steel bodies:
 ASTM A 193 Gr. B7 for bolts and stud bolts.
 ASTM A 194 Gr. 2H for nuts.
For alloy steel and stainless steel bodies:
 ASTM A 320 Gr. B8 class 2 for bolts and stud bolts
 ASTM A 194 8 for nuts
I. Bolts and stud bolts will meet the following codes: ANSI B16.5 and ANSI B1.1 CI.2A; and nuts:
ANSI B18.2.2 and B1.1 CL.2B
J. Different materials can be offered for the valves provided, and they shall meet or exceed the
specified requirements. As minimum the valves material shall meet the Piping Class
Specifications. A technical justification for these changes will be presented during the offering
stage. These may be approved or not.
K. "HRC" in the data sheets means “Hardness Rockwell C” and indicates the minimum accepted
value for the material.
L. "ENP" in the data sheets refers to “Electroless Nickel Plated”.
M. Tight Shutoff classifications indicated in the datasheets correspond to standard ANSI B16.104.
N. The packing design will avoid the chance of being ejected by the internal pressure. For non
Teflon packing (TFE), if recommended, the valve will include a packing lubricator with a valve.
O. A screwed-design easily-removable seat will be preferred.
P. Fireproof design is required for the block valves bodies, API 607 standard test procedure should
be applied, as an alternative API RP6F recommendation, can be applicable. Ball valves will have
non-eject systems as defined in standard ANSI B16.34.
Q. On-off valves will be capable of blocking the flow rate indicated in the data sheets.
R. If vent or drain connection exist, valves must be supplied with plug for them. The sizes shall be
according to API STD 06
S. Valves shall be double block and bleed in the trunnion construction, when specified in data sheet
T. Minimum thickness and hardness of nickel overlay on stem, ball and seat ring, if is required,
shall be as follows:
- Carbon and alloy steel: thickness 50 microns for standard device.
- Stainless steel: thickness 25 microns, 60 HRC.
U. Asbestos free gasket/packing shall be used.
V. Antistatic device must be provided
4. ACTUATORS CHARACTERISTICS
A. Each valve will be supplied with its corresponding actuator, of the type required in the datasheets
B. In case of pneumatic actuators, they will be single effect piston type, with reset spring to fail
position with solenoid valve.
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C. In all cases, actuators sizing will be performed using the shutoff pressure of the datasheets as the
max. static differential pressure the actuator will support. However, the vendor will consider for
sizing, dynamic forces to be supported by the actuator while opening or closing the valve.
D. Actuators will be sized considering the pneumatic pressure supply indicated in the datasheets, as
a minimum. Pressures up to 50% higher can be present. If necessary, pressure regulators will be
supplied.
E. Bleeding type regulators will not be accepted and the accessories like positioners and
manual/solenoid valves will be sized to discharge in a line with a 0.5 Kg/cm2 back pressure. All
the connections will be NPT.
F. The vendor will include a filter with the valve.
H. When fireproof actuators is required, each one will be supplied with a certificate issued by FM
(Factory Mutual-USA) or an equivalent international association, certifying the agreement and
test of the fireproof condition.
I. During the offering stage the vendor will indicate explicitly that the referred certificates will be
submitted. In case of a different association than FM-USA, the vendor will present, under his
total responsibility, a note indicating the equivalence between both associations. These
international associations will be independent, without any link with commercial firms.
J. Actuator springs exposed to the atmosphere will be protected against corrosion (electrochemical
protection) and painted following vendor standards.
K. The flow direction (to close/open) will coincide with the valve fail safe position. If not, the
spring will be designed with a 2 safety factor.
L. All Block Valves must operate within 10 sec. Maximum.
M. Handwheel if required must be manually enable for operators.
5. ACCESSORIES CHARACTERISTICS
A. The stem position will be indicated on a scale with an indicating pointer, directly attached to it.
B. All required accessories and/or supplied with the valve will be mounted on it (yokes, etc.). In the
case of elements of the pneumatic circuit it will also be furnished all the tubing and fittings
required to conform a fully operational unit, ready for operation.
C. If fireproof services, 1/4" (minimum diameter) stainless steel tube and NPT fittings will be used.
D. When solenoid valves are specified the following type shall be supplied:
2 pos., 3 way SS 316 - 24 VCC – Intrinsically Safety.: with weather proof and watertight case
NEMA 4X / IP65, to be used with intrinsically safe barriers certified by FM-USA, electrical
connections ½” NPT, continuous service, Coil class”F” .
When electrical remote reset is specified, must be supplied a system that permit reset the valve
remotely.
E. When a fireproof actuator is specified, accessories (solenoid valves, etc.) will also meet this
requirement. Fire protections or similar can be used to assure the operation during the emergency
condition (fire).
F. Limit switches, will be weather proof and watertight case NEMA 4X / IP65, for intrinsically safe
circuits approved by FM-USA. They will have one (1) switch SPDT, 24 VCC - 2A. Each valve
will use two limit switches (valve open”ZSO" / close”ZSC"). Microswitch type will be accepted.
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G. When indicated in data sheet, solenoid valves will have local manual mechanical operation with
internal linkage
H. Each actuator shall be provided with a mechanical protective system bypass (locking the stem)
that permits in service testing of the protective system (valve command) without operate the
valve.
I. All materials shall be suitable for operating in a salt laden marine weather atmosphere.
6. SPARE PARTS
A recommended spare parts list as indicated in the Material Requisition will be supplied.
7. DATA SHEETS
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1
TAG Nº
2
3
SERVICE
GENERAL
LINE Nº
4
DWG
5
Fluid
Crit Pres PC
Units
Max Flow
Norm Flow
Min Flow
6
Flow Rate
Kg/h
7
8
9
10
11
12
13
14
15
Inlet Pressure
Outlet Pressure
Inlet Temperature
Spec Wt/Spec Grav/Mol Wt
Viscosity/Spec Heats Ratio
Vapor Pressure Pv
*Required Cv
*Travel
*Predicted SPL
Kg/cm2g
Kg/cm2g
Deg C
Cp/Kg/cm2a
16
Differential pressure
Kg/cm2
17
18
19
Pipe Line Size
In
& Schedule
Out
Pipe Line Insulation
51
52
53
*Type
*Mfr & Model
*Size
*Type
BALL FIRE SAFE
*Size
ANSI Class
Max Press/Temp
*Mfr & Model
*Body/Bonnet Matl
*Liner Material/ID
End
In
Connection
Out
Fig Face Finish
End Ext/Matl
*Flow Direction
*Type of Bonnet
Lub & Iso Valve NO
*Packing Material
*Packing Type
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
On/Off
YES
Spring Action Open/Close
*Max Allowable Pressure
*Min Required Pressure
Available Air Supply Press:
Max
5 Kg/cm2g
*Bench Range
Actuator Orientation
Handwheel Type
Air Failure Valve
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
SERVICE
CONDITION
LINE
VALVE
BODY/
BONNET
TRIM
*Type
BALL FIRE SAFE
*Size
FULL Rated Travel
*Characteristic ON-OFF
*Balanced/Unbalanced
*Rated CV
FL
XT
*Plug/Ball/Disk Matl
A351 (CF8M)
*Seat Material
316 SS/PTFE
*Cage/Guide Matl
NONE
*Stem Material
316 SST
70
90° 71
72
73
74
75
76
77
78
79
1 Group
CD Div
2 80
81
SOLENOID VALVE: I.S. Type QTY:1
82
ELECT. SUPPLY: 24 VCC Coil Class: “F”
83
Mfr & Model:
84
W/ Linkage
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Design
%
DBA
ACTUATOR
Eff Area
Modulation
ON /OFF
CLOSE
Min
Set at
Travel Indicator: YES - Mechanical actuated from stem
POSITIONER
*Type
NOT REQUIRED
*Mfr & Model
*On Incr Signal Output Incr/Decr
Gauges
By Pass
*Cam Characteristic
SWITCHES
*Type
SPDT MECHA.
*Mfr & Model
Contacts/Rating
Actuation Points
Quantity
2
Terminal block inside case
AIR SET
*Mfr & Model
*Set Pressure
Filter
YES
NEC Class
SPECIALS
Shut-Off
TESTS
*Hydro Pressure
YES
ANSI/FCI Leackage Class
API 607 4TH EDITION
Gauge
Blok Valves
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