Supplementary Specification to API Standard 526 Flanged ...

SPECIFICATION

S-730

August 2020

Supplementary Specification to API Standard 526 Flanged Steel Pressure-relief Valves

Revision history VERSION 0.1

DATE August 2020

PURPOSE Issued for Public Review

Acknowledgements

This IOGP Specification was prepared by a Joint Industry Programme 33 Standardization of Equipment Specifications for Procurement organized by IOGP with support by the World Economic Forum (WEF).

Disclaimer Whilst every effort has been made to ensure the accuracy of the information contained in this publication, neither IOGP nor any of its Members past present or future warrants its accuracy or will, regardless of its or their negligence, assume liability for any foreseeable or unforeseeable use made thereof, which liability is hereby excluded. Consequently, such use is at the recipient's own risk on the basis that any use by the recipient constitutes agreement to the terms of this disclaimer. The recipient is obliged to inform any subsequent recipient of such terms. This publication is made available for information purposes and solely for the private use of the user. IOGP will not directly or indirectly endorse, approve or accredit the content of any course, event or otherwise where this publication will be reproduced.

Copyright notice The contents of these pages are ? International Association of Oil & Gas Producers. Permission is given to reproduce this report in whole or in part provided (i) that the copyright of IOGP and (ii) the sources are acknowledged. All other rights are reserved. Any other use requires the prior written permission of IOGP. These Terms and Conditions shall be governed by and construed in accordance with the laws of England and Wales. Disputes arising here from shall be exclusively subject to the jurisdiction of the courts of England and Wales.

Supplementary Specification to API Standard 526 Flanged Steel Pressure-relief Valves

Foreword

This specification was prepared under Joint Industry Programme 33 (JIP33) "Standardization of Equipment Specifications for Procurement" organized by the International Oil & Gas Producers Association (IOGP) with the support from the World Economic Forum (WEF). Companies from the IOGP membership participated in developing this specification to leverage and improve industry level standardization globally in the oil and gas sector. The work has developed a minimized set of supplementary requirements for procurement, with life cycle cost in mind, resulting in a common and jointly agreed specification, building on recognized industry and international standards.

Recent trends in oil and gas projects have demonstrated substantial budget and schedule overruns. The Oil and Gas Community within the World Economic Forum (WEF) has implemented a Capital Project Complexity (CPC) initiative which seeks to drive a structural reduction in upstream project costs with a focus on industry-wide, non-competitive collaboration and standardization. The CPC vision is to standardize specifications for global procurement for equipment and packages. JIP33 provides the oil and gas sector with the opportunity to move from internally to externally focused standardization initiatives and provide step change benefits in the sector's capital projects performance.

This specification has been developed in consultation with a broad user and supplier base to realize benefits from standardization and achieve significant project and schedule cost reductions.

The JIP33 work groups performed their activities in accordance with IOGP's Competition Law Guidelines (November 2014).

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Supplementary Specification to API Standard 526 Flanged Steel Pressure-relief Valves

Table of Contents

Foreword ..................................................................................................................................................1 Introduction ...............................................................................................................................................4 1 Scope .......................................................................................................................................................6 2 Normative References..............................................................................................................................6 3 Terms, Definitions, Acronyms, Abbreviations and Symbols.....................................................................6 3.1 Terms and Definitions ....................................................................................................................7 3.2 Acronym, Abbreviations and Symbols ...........................................................................................7 4 Responsibility ...........................................................................................................................................8 6 Orifice Areas and Designations ................................................................................................................8 7 Design ......................................................................................................................................................8 7.1 General...........................................................................................................................................8 7.4 Dimensions...................................................................................................................................15 7.5 Lifting Levers ................................................................................................................................15 7.6 Special Construction Features .....................................................................................................16 7.7 Restricted Lift Pressure-Relief Valves .........................................................................................16 7.8 Threaded Auxiliary Connections ..................................................................................................16 7.9 Lifting............................................................................................................................................17 7.10 Surface Protection........................................................................................................................17 8 Material ...................................................................................................................................................18 8.1 General.........................................................................................................................................18 8.2 Spring-loaded Pressure-relief Valves ..........................................................................................18 8.3 Pilot-operated Pressure-relief Valves ..........................................................................................19 8.4 Welding ........................................................................................................................................20 9 Inspection and Shop Tests .....................................................................................................................20 9.1 Inspection .....................................................................................................................................20 9.2 Set Pressure Test ........................................................................................................................21 9.3 Seat Leakage Test .......................................................................................................................21 9.4 Hydrostatic Testing ......................................................................................................................21 9.5 Fugitive Emission Testing ............................................................................................................21 10 Identification and Preparation for Shipment ...........................................................................................22 10.1 Identification .................................................................................................................................22 10.2 Preparation for Shipment .............................................................................................................23 11 Pressure?temperature Tables................................................................................................................24 11.1 Materials.......................................................................................................................................24 11.3 Maximum Inlet Flange Pressure ..................................................................................................24 11.4 Outlet Pressure Limit....................................................................................................................24 Annex A (normative) Pressure-relief Valve Nameplate Nomenclature ............................................................25

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Supplementary Specification to API Standard 526 Flanged Steel Pressure-relief Valves

Annex F (normative) Material Selection Tables ...............................................................................................27 Annex G (normative) Supplementary Requirements for Inspection and Testing .............................................37 Annex H (informative) Fugitive Emissions Production Testing........................................................................41

List of Tables

Table 2--Spring Materials ................................................................................................................................19 Table A.1--PRV Nameplate Markings .............................................................................................................25 Table A.2--Pilot Nameplate markings..............................................................................................................26 Table F.1--Materials Selection Table Spring Loaded Type.............................................................................28 Table F.2--Material Selection table Pilot Operated Type ................................................................................33 Table F.3--Bolting Material Selection ..............................................................................................................36 Table G.1--NDE Requirements .......................................................................................................................37 Table G.2--Extent, Method, and Acceptance Criteria of NDE/Item Examination Code ..................................38

List of Figures

Figure 1a--Cross-section Drawing: Spring Loaded Pressure-relief Valve ........................................................9 Figure 1b--Typical Vent Screen.......................................................................................................................10 Figure 2--Cross-section: Pop Action Pilot .......................................................................................................11 Figure 3--Cross-section: Modulating Pilot with Piston.....................................................................................12 Figure 5--Cross-section: Pilot Valve Main Body..............................................................................................14 Figure 6--Cross-section: Accessory Lifting Lever ...........................................................................................15

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