Skip to main content

ISO 23251:2019

Current Date published:

Petroleum, petrochemical and natural gas industries — Pressure-relieving and depressuring systems

This document is applicable to pressure-relieving and vapour depressuring systems. Although intended for use primarily in oil refineries, it is also applicable to petrochemical facilities, gas plants, Liquefied Natural Gas (LNG) facilities and oil and gas production facilities. The information provided is designed to aid in the selection of the system that is most appropriate for the risks and circumstances involved in various installations.

This document supplements API Std 521, 6th edition (2014), the requirements of which are applicable with the exceptions specified in this document.

Get this standard Prices exclude GST
PDF ( Single user document)
$79.13 NZD
Networkable PDF
Price varies
Preview only close
Prev {{ page }}/ {{ numPages }} Next
Preview only close
Prev {{ page }}/ {{ numPages }} Next
Pages: 5

Previous versions

Keep me up-to-date

Sign up to receive updates when there are changes to this standard

Related Information

Similar Standards

  • BS EN ISO 10437:2003

    Petroleum, petrochemical and natural gas industries. Steam turbines. Special-purpose applications

  • BS EN ISO 10438-1:2007

    Petroleum, petrochemical and natural gas industries. Lubrication, shaft-sealing and control-oil systems and auxiliaries, General requirements

  • BS EN ISO 10438-2:2007

    Petroleum, petrochemical and natural gas industries. Lubrication, shaft-sealing and control-oil systems and auxiliaries, Special-purpose oil systems

  • BS EN ISO 10438-3:2007

    Petroleum, petrochemical and natural gas industries. Lubrication, shaft-sealing and control-oil systems and auxiliaries, General-purpose oil systems

Preview only close
Prev {{ page }}/ {{ numPages }} Next
Preview only close
Prev {{ page }}/ {{ numPages }} Next
Pages: 5

Previous versions

ISO 23251:2019

Get this standard Prices exclude GST
PDF ( Single user document)
$79.13 NZD
Networkable PDF
Price varies

Request to add this standard to your subscription

ISO 23251:2019

Price varies
Online library subscription

Your organisation’s Account Administrator must approve a request to add a standard to your subscription.

You may add a comment to the administrator below.

Cancel