What is BS EN 13445‑4 about?

BS EN 13445‑4 is the fourth part of a series on unfired pressure vessels. BS EN 13445‑4 specifies requirements for the manufacture of unfired pressure vessels and their parts, made of steel. This includes their connections to non-pressure parts.

BS EN 13445‑4 also specifies requirements for material traceability, manufacturing tolerances, welding requirements, requirements for permanent joints other than welding, production tests, forming requirements, heat treatment, repairs, and finishing operations.

BS EN 13445‑4 specifies the materials used, manufacturing tolerance, weld details, welding, manufacture and testing of welds, production tests, forming of pressure parts, post weld heat treatment (PWHT), repairs, finishing operations, structural tolerances and specifications, and approval of expansion procedures and operators; for unfired pressure vessels.

Who is BS EN 13445‑4 for?

BS EN 13445‑4 on unfired pressure vessels is useful for organizations that commission, design, build and maintain pressure vessels, mainly in:

Oil and gas
Petrochemicals
Process plant
Energy generation (including nuclear)
Food and drink

Users:

Mechanical engineers
Pressure vessels designers and manufacturers
Inspectors and inspection bodies (notified bodies/approved bodies)

Why should you use BS EN 13445‑4?

If pressure vessels are expected to do their jobs successfully, they need to adhere to the highest quality standards. This keeps their contents intact and ensures the safety of those around.

Following the design guidelines and testing procedures in BS EN 13445‑4 ensures that volatile contents such as liquids and gases don’t corrode the container, even when subjected to extreme temperature changes.

Besides design and construction, BS EN 13445‑4 also offers guidelines to inspect and test in-service vessels, subject to appropriate adjustment.

What’s changed since the last update?

BS EN 13445‑4:2021 supersedes BS EN 13445‑4:2014+A1:2016. BS EN 13445‑4:2021 includes some technical changes with respect to BS EN 13445‑4:2014+A1:2016. These include:

The modification of 7.4 Qualification of welders and welding operators in order to consider EN ISO 9606-1:2017
Qualification testing of welders
Fusion welding
Part 1: Steels

BS EN 13445-4:2021

Unfired pressure vessels - Fabrication

Current, Under Review

Published:

31 May 2021