Previous Issue: 9 August 2009 Next Planned Update: 20 March 2018

Revised paragraphs are indicated in the right margin Page 1 of 8

Primary contact: Al-Awami, Luay Hussain on +966-3-8801341

Copyright©Saudi Aramco 2013. All rights reserved.

Materials System Specification

34-SAMSS-611 20 March 2013

Safety Relief Valves - Conventional and Balanced Types

Document Responsibility: Instrumentation Standards Committee

Saudi Aramco DeskTop Standards

Table of Contents 1 Scope............................................................. 2

7 Design............................................................ 3

8 Material........................................................... 4

9 Inspection and Shop Tests (Addition)............ 4

12 Shipment (Addition)........................................ 5 Appendix A - Pressure Relief Valve Specification Sheet................................. 7

Appendix B - Nameplate Data............................... 8

Document Responsibility: Instrumentation Standards Committee 34-SAMSS-611

Issue Date: 20 March 2013

Next Planned Update: 20 March 2018 Safety Relief Valves - Conventional and Balanced Types

Page 2 of 8

1 Scope

This specification together with Buyer's Quotation Request or purchase order and

Specification Sheet(s) SA-8020-611-ENG define the minimum technical requirements

for conventional and balanced type industrial safety relief valves.

API STD 526 is modified, as indicated in this specification, to cover requirements for

pressure relief valves that have threaded connections.

The following paragraph numbers refer to API STD 526, Sixth Edition, April 2009,

which is a part of this specification. The text in each paragraph below is an addition,

exception, modification, or deletion to API STD 526 as noted. Paragraph numbers not

appearing in API STD 526 are new paragraphs to be inserted in numerical order.

2 References (Addition)

Material or equipment supplied to this specification shall comply with the latest

edition of the references listed below unless otherwise noted.

Saudi Aramco Documents

Saudi Aramco Engineering Procedure

SAEP-302 Instructions for Obtaining a Waiver of a Mandatory

Saudi Aramco Engineering Requirement

Saudi Aramco Inspection Requirements Form

175-341900 Safety Relief Valves Conventional and Balanced

Types

Saudi Aramco Forms and Data Sheets

SA-8020-611-ENG Instrument Specification Sheet Safety Relief Valves

Industry Codes and Standards

American National Standards Institute

ANSI B1.20.1 Pipe Threads, General Purpose

American Petroleum Institute

API STD 526 Flanged Steel Pressure Relief Valves

API STD 527 Seat Tightness of Pressure Relief Valves

Document Responsibility: Instrumentation Standards Committee 34-SAMSS-611

Issue Date: 20 March 2013

Next Planned Update: 20 March 2018 Safety Relief Valves - Conventional and Balanced Types

Page 3 of 8

American Society of Mechanical Engineers

ASME SEC VIII D1 Rules for Construction of Pressure Vessels

ASME B16.5 Pipe Flanges and Flanged Fittings

American Society for Testing and Materials

ASTM E10 Standard Test Methods for Brinell Hardness of

Metallic Materials

ASTM E18 Standard Test Methods for Rockwell Hardness of

Metallic Materials

National Association of Corrosion Engineers/International Standardization

Organization

NACE MR0175/ISO 15156 Petroleum and Natural Gas Industries-

Materials for use in H2S-Containing

Environments in Oil and Gas Production

1.5 Conflicting Requirement (Replacement)

Any conflicts between this specification and other applicable Saudi Aramco

Materials System Specifications (SAMSSs), Engineering Standards (SAESs),

Standard Drawings (SASDs), or industry standards, codes, and forms shall be

resolved in writing by the Company or Buyer's Representative through the

Manager, Process & Control Systems Department of Saudi Aramco, Dhahran.

Direct all requests to deviate from this specification in writing to the Company or

Buyer's Representative, who shall follow internal company procedure SAEP-302

and forward such requests to the Manager, Process & Control Systems

Department of Saudi Aramco, Dhahran.

1.6 Orifice Areas and Designations (Clarification)

The orifice areas shown on the Specification Sheet(s) Form SA-8020-611-ENG

Lines 66 and 67 are the calculated required area, and the selected standard API

area respectively. Relief valve sizing calculations shall be shown on the Form

or included as an additional sheet.

7 Design

7.1 ASME Code Requirement (Addition)

All safety relief valves specified by this SAMSS shall be designed and

manufactured and tested in accordance with the ASME Boiler and Pressure

Document Responsibility: Instrumentation Standards Committee 34-SAMSS-611

Issue Date: 20 March 2013

Next Planned Update: 20 March 2018 Safety Relief Valves - Conventional and Balanced Types

Page 4 of 8

Vessel Code and shall carry the appropriate stamp, including those for liquid

services.

7.3 Valve Selection (Addition)

Tables 3 through 16 apply to flanged valves only. Pressure temperature limits

for threaded pressure relief valves shall be specified by the manufacturer and

approved by Company.

7.4 Dimensions (Addition)

Dimensions for threaded pressure relief valves shall be per manufacturers’

specification.

Threaded connections shall comply with ANSI B1.20.1.

7.6 Special Construction Features (Addition)

Special features shall be supplied as specified per SA-8020-611-ENG.

Bonnet caps shall be drilled and tapped 83 thread per ANSI B1.20.1. A solid

steel plug shall be inserted prior to shipment.

8 Material

3.1 General (Addition)

In sour service all wetted parts, welds and heat affected zones of welds exposed

to corrosive components shall meet the hardness and heat treatment

requirements as specified in NACE MR0175/ISO 15156. This includes material

under overlays, platings or coatings.

3.2 Body and Spring (Addition)

Spring materials shall be per manufacturers’ standard and shall be suitable for

the intended service.

9 Inspection and Shop Tests (Addition)

Minimum inspection requirements are specified in Saudi Aramco Inspection

Requirement Form 175-341900.

When NACE MR0175/ISO 15156 is specified in the Purchase Order, the manufacturer

shall conduct hardness tests on all wetted parts in accordance with ASTM E10 or

ASTM E18. Manufacturer shall conduct tests on a production sampling basis on all

affected components or produce test documentation to certify the base material has been

Document Responsibility: Instrumentation Standards Committee 34-SAMSS-611

Issue Date: 20 March 2013

Next Planned Update: 20 March 2018 Safety Relief Valves - Conventional and Balanced Types

Page 5 of 8

tested. Components or base metal shall be tested on a heat lot basis. Test results shall

be traceable to Purchase Order line items.

9.4 Hydrostatic Test (Addition)

This test shall be conducted in accordance with ASME SEC VIII D1, Pressure

Vessel Code, UG-136 (d) (2,3). The “design pressure of the parts” in UG-136

(d) (2) shall mean vendor's maximum design pressure for the subject valve

(NOT SET PRESSURE of SUBJECT VALVE).

9.5 Visual Inspection (Addition)

Visual inspection and physical check shall be made when so specified in the

Purchase Order:

a) Compliance with the purchase order description, relevant specifications,

paint description, certified drawings and Vendor's catalog description as

applicable.

b) Verification of the identification name plate for compliance with the data

of Appendix B.

c) Verification of satisfactory workmanship, material, components,

dimensions and freedom from surface defects.

9.6 Test Requirements (Addition)

Production tests shall comply with ASME Boiler and Pressure Vessel Code

Requirements.

When so specified on the Purchase Order, 30%, with a minimum of one, of the

total number of valves ordered shall be selected for a repetition of the Vendor's

(set) pressure and leakage tests and shall produce a record which should

duplicate the original test result. If the recheck of one or more valves does not

satisfy the inspector, then all the valves ordered must be rechecked in the

presence of the inspector.

12 Shipment (Addition)

Export packing, marking and shipping shall be in accordance with the requirements of

the Purchase Order.

Threaded openings shall be plugged with suitable protective devices. Temporary plugs

should be readily distinguishable from permanent metal plugs.

Document Responsibility: Instrumentation Standards Committee 34-SAMSS-611

Issue Date: 20 March 2013

Next Planned Update: 20 March 2018 Safety Relief Valves - Conventional and Balanced Types

Page 6 of 8

Inlet and outlet flanges shall be protected to prevent damage from or entrance of foreign

material during shipment.

Revision Summary

20 March 2013 Revised the “Next Planned Update”. Reaffirmed the contents of the document, and reissued with editorial changes.

Document Responsibility: Instrumentation Standards Committee 34-SAMSS-611

Issue Date: 20 March 2013

Next Planned Update: 20 March 2018 Safety Relief Valves - Conventional and Balanced Types

Page 7 of 8

Appendix A – Pressure Relief Valve Specification Sheet

Instrument Specification Sheet (I.S.S.)

(Replacement) For requirements that are specific for each individual safety relief valve

refer to: Form SA-8020-611-ENG Sheets 1, 2, and 3 Instrument Specification Sheet -

Safety Relief Valves Conventional and Balanced Types.

Document Responsibility: Instrumentation Standards Committee 34-SAMSS-611

Issue Date: 20 March 2013

Next Planned Update: 20 March 2018 Safety Relief Valves - Conventional and Balanced Types

Page 8 of 8

Appendix B – Nameplate Data

Nameplate Data (Addition, if applicable)

Valve to NACE MR0175/ISO 15156.