ISO 19240:2017

Industrial valves - Lined metal quarter turn and check valves for chemical process and related industries

ISO 19240:2017 specifies requirements for design, dimensions, material, fabrication and production testing of lined metal quarter turns valves (plug valves, butterfly valves, ball valves) and check valves with flanged, wafer and wafer lug body types. It covers valves of the nominal sizes, DN: - 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 750, 800, 900, 1 000, 1 200; corresponding to nominal pipe sizes, NPS 1/2 to NPS 48, and applies to pressure designations: - PN 10, 16, 25, 40; - Class 150, 300.

Robinetterie industrielle — Robinets quart de tour et clapets de non-retour métalliques revêtus pour les industries de procédé chimique et industries connexes

General Information

• Status: Published
• Publication Date: 09-May-2017
• ICS: 23.060.01 - Valves in general
• ICS: 23.060.50 - Check valves
• Technical Committee: ISO/TC 153 - Valves
• Drafting Committee: ISO/TC 153 - Valves
• Current Stage: 9093 - International Standard confirmed
• Start Date: 07-Sep-2022
• Completion Date: 13-Dec-2025

Overview

ISO 19240:2017 - Industrial valves - Lined metal quarter turn and check valves for chemical process and related industries - defines design, dimensional, material, fabrication and production testing requirements for lined metal quarter-turn valves (plug, butterfly, ball) and check valves used in corrosive and chemical process applications. The standard covers flanged, wafer and wafer-lug body types for nominal sizes DN 15–1200 (NPS 1/2–48) and pressure designations PN 10, 16, 25, 40 and Class 150, 300.

Key topics and technical requirements

• Valve types covered: Lined metal plug, butterfly, ball (quarter-turn) valves and check valves.
• Sizes & ratings: DN 15 to DN 1200 (NPS 1/2 to NPS 48); PN 10/16/25/40 and ASME Class 150/300.
• Materials & linings: Valve linings shall be fluoropolymer or polymer materials; lining thickness minimum 2.5 mm on all media-wetted surfaces and end flange sealing faces.
• Liner anchoring: Liners must be mechanically anchored to body and closure elements to resist axial and radial flow forces.
• Pressure/temperature ratings: Assemblies must comply with pressure/temperature tables referenced to EN/ASME standards; limitations due to lining materials (e.g., fluoropolymers) must be marked.
• Design & construction details: Body wall thickness, shaft design (blow-out proof), continuation of shaft lining above primary shaft seal, face-to-face dimensions per ISO 5752, and flange compatibility with EN 1092 and ASME B16.x standards.
• Testing & inspection: Lining tests (visual, porosity, anti‑static), pressure testing (ISO 5208/EN 12266), allowable leakage rates, and additional examinations as required.
• Marking: PN-designated valves marked per ISO 5209; Class-designated valves per ASME B16.34. Required markings include differential pressure and any application restrictions.

Applications and who uses it

ISO 19240:2017 is intended for use in the chemical process and related industries where corrosion-resistant, lined metal valves are required. Typical users:

• Valve manufacturers and designers for product specification and compliance
• Plant engineers and piping designers selecting lined valves for corrosive services
• Procurement and specification writers creating tender documents and datasheets
• Quality, inspection and testing teams verifying production testing and marking
• EPC contractors and maintenance teams in chemical, petrochemical, pharmaceutical, water treatment and related facilities

Related standards

Key referenced standards for dimensions, testing and ratings:

• ISO 5752 (face-to-face dimensions)
• ISO 5208 (pressure testing of metallic valves)
• ISO 5209 (marking)
• EN 1092 series (flanges)
• EN 12516 series / ASME B16.34 (pressure/temperature and shell strength)
• EN 12266 (testing procedures)

ISO 19240:2017 provides a practical framework for specifying, manufacturing and testing lined metal quarter-turn and check valves to ensure compatibility, safety and performance in corrosive process environments.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 19240
First edition
2017-05
Industrial valves — Lined metal
quarter turn and check valves
for chemical process and related
industries
Robinetterie industrielle — Robinets quart de tour et clapets de non-
retour métalliques revêtus pour les industries de procédé chimique et
industries connexes
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
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Tel. [phone]
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www.iso.org
ii © ISO 2017 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Pressure/temperature ratings . 3
5 Design . 3
5.1 Body wall thickness . 3
5.2 Lining and seat materials . 4
5.3 Liner anchoring . 4
5.4 Minimum lining thickness . 4
5.5 Shaft . 4
5.6 Dimension and tolerances of body ends . 4
5.6.1 Dimensions of flanges . 4
5.6.2 Face-to-face dimensions . 4
5.6.3 Flange facing type and dimension . 4
6 Marking . 5
7 Inspection and testing . 6
7.1 Lining test . 6
7.1.1 Visual inspection . 6
7.1.2 Porosity test . 6
7.1.3 Anti-static test . 6
7.2 Pressure test . 6
7.3 Allowable closure test leakage rate . 6
7.4 Additional examination . 6
Bibliography . 7
Foreword
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URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 153, Valves.
iv © ISO 2017 – All rights reserved

Introduction
The purpose of this document is to establish requirements for lined metal quarter turn valves (butterfly
valves, ball valves, plug valves and check valves) in corrosive fluid applications and related industries.
It is intended that this document facilitates compatibility with flanged lined fittings and lined pipe.
INTERNATIONAL STANDARD ISO 19240:2017(E)
Industrial valves — Lined metal quarter turn and check
valves for chemical process and related industries
1 Scope
This document specifies requirements for design, dimensions, material, fabrication and production
testing of lined metal quarter turns valves (plug valves, butterfly valves, ball valves) and check valves
with flanged, wafer and wafer lug body types.
It covers valves of the nominal sizes, DN:
— 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 750, 800, 900,
1 000, 1 200;
corresponding to nominal pipe sizes, NPS 1/2 to NPS 48, and applies to pressure designations:
— PN 10, 16, 25, 40;
— Class 150, 300.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5208:2015, Industrial valves — Pressure testing of metallic valves
ISO 5209:1977, General purpose industrial valves — Marking
ISO 5752, Metal valves for use in flanged pipe systems — Face-to-face and centre-to-face dimensions
E N 10 92-1:20 07+A 1: 2013, Flanges and their joints — Circular flanges for pipes, valves, fittings and
accessories, PN designated — Part 1: Steel flanges
EN 1092-2, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 2: Cast iron flanges
EN 12266-2:2012, Industrial valves — Testing of metallic valves — Part 2: Tests, test procedures and
acceptance criteria — Supplementary requirements
EN 12516-1, Industrial valves — Shell design strength — Part 1: Tabulation method for steel valve shells
EN 12516-2, Industrial valves — Shell design strength — Part 2: Calculation method for steel valve shells
EN 12516-4, Industrial valves — Shell design strengt
...