ISO 10434-2020 PDF

Full title and description

ISO 10434:2020 — Bolted bonnet steel gate valves for the petroleum, petrochemical and allied industries. Specifies requirements for a heavy-duty series of bolted-bonnet steel gate valves (outside-screw-and-yoke, rising stem or non-rising handwheel, single or double gate, wedge or parallel seating, metallic seats) including allowable sizes, end connections and pressure classes relevant to refinery and related applications.

Abstract

This International Standard sets out the design, materials, construction, inspection and testing requirements for bolted-bonnet steel gate valves intended for petroleum, petrochemical and allied industries where corrosion, erosion or severe service demand full-port openings, heavy wall sections and robust stem design. It covers flanged and butt-welding ends, metallic seating surfaces and applies to a defined range of nominal sizes and pressure classes.

General information

• Status: Published.
• Publication date: August 2020 (Edition 3, 2020-08).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 75.180.20 (Valves).
• Edition / version: 3 (2020).
• Number of pages: 38.

Scope

Applies to heavy-duty bolted-bonnet steel gate valves intended for petroleum refinery and related applications. The standard specifies constructional and performance requirements for valves with features such as bolted bonnet, outside screw and yoke, rising stems or non-rising handwheels, single or double gate, wedge or parallel seating, metallic seating surfaces, and flanged or butt-welding ends; it defines applicable nominal sizes (DN 25 up to DN 600 / NPS 1 to 24) and pressure class/PN designations covered by the standard.

Key topics and requirements

• Design and construction rules for bolted-bonnet steel gate valves (body, bonnet, bonnet joint, stem and gate design).
• Permitted valve configurations: outside-screw-and-yoke (OS&Y), rising-stem or non-rising handwheel operation, single and double gate designs, wedge and parallel-seat options.
• Material selection and trim options for metallic seating and corrosion/erosion resistance suitable for refinery service.
• Dimensional coverage: nominal sizes DN 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600 (NPS 1–24).
• Pressure ratings covered: Class designations 150, 300, 600, 900, 1500, 2500 and PN designations 16, 25, 40, 63, 100, 160, 250, 400.
• Inspection and testing requirements referenced to valve-testing practice (product-standard test requirements; manufacturers commonly apply valve pressure/leakage tests per recognized valve test standards).

Typical use and users

Used by valve manufacturers, procurement/specification engineers, piping designers, plant operators and inspection bodies in the oil & gas, petrochemical, refinery and allied heavy-industry sectors who require standardized heavy-duty gate valves for severe-service piping systems. Procurement teams use it to specify valve construction, materials, sizes and pressure classes; manufacturers use it to design, test and certify products for these markets.

Related standards

ISO 10434 is a product standard within ISO/TC 153 (valves) and is commonly referenced alongside other valve and testing standards. Commonly associated or comparable standards include API 600 (steel gate valves for petrochemical/pipeline service) and API/API-related product specifications, ASME B16.34 (general requirements for flanged, threaded and welding-end valves), and valve pressure-testing standards such as ISO 5208. ISO 10434 replaces earlier iterations (ISO 10434:2004 and ISO 10434:1998).

Keywords

bolted bonnet; gate valve; steel gate valve; petrochemical valves; OS&Y; rising stem; metal-seated; DN sizes; pressure class; flange; butt-weld; valve testing.

FAQ

Q: What is this standard?

A: ISO 10434:2020 is an International Standard that defines requirements for bolted-bonnet steel gate valves used in petroleum, petrochemical and allied industries, covering design, materials, sizes, pressure classes, testing and marking.

Q: What does it cover?

A: It covers heavy-duty bolted-bonnet gate valves (OS&Y, rising or non-rising stems), single/double gates, wedge/parallel seating, metallic seats, flanged and butt-weld ends, specific DN/NPS size ranges and pressure class/PN designations; it also sets inspection and testing expectations referenced to valve test standards.

Q: Who typically uses it?

A: Manufacturers, specification engineers, procurement/purchasing teams, plant operators, inspection bodies and third-party certifiers in oil & gas, refining, petrochemical and heavy industrial facilities.

Q: Is it current or superseded?

A: Current — ISO 10434:2020 is the active (third) edition published in 2020; it superseded ISO 10434:2004 and earlier editions. Confirmed status and revision history are recorded by ISO.

Q: Is it part of a series?

A: It is a product standard maintained under ISO/TC 153 (Valves) and is part of the family of international valve standards (other product and test standards include ISO 5208 for valve pressure testing and various ISO/and national valve specifications). For overall valve requirements users usually refer to multiple ISO and regional standards together.

Q: What are the key keywords?

A: Bolted bonnet, gate valve, steel valve, petrochemical, OS&Y, rising stem, flanged end, butt-weld end, metallic seat, DN/NPS, pressure class.