PD 5500-2024 + A1-2024 PDF

Full title and description

STB PD 5500-2024 + A1-2024 — national publication (СТБ) of PD 5500:2024 together with Amendment A1:2024. This document is the specification for unfired pressure vessels covering requirements for design, materials, fabrication, inspection and testing used by manufacturers, fabricators and inspection bodies.

Abstract

PD 5500:2024 with Amendment A1:2024 specifies technical requirements for the safe design, manufacture and in-service inspection of unfired pressure vessels made from a range of metallic materials. The 2024 edition updated material tables, design and fabrication guidance and is maintained with annual amendments (A1:2024 being the Year‑1 amendment).

General information

• Status: Current / Definitive (national publication STB of PD 5500:2024 + A1:2024 available).
• Publication date: PD 5500:2024 — 31 January 2024; PD 5500:2024 + A1:2024 (Amendment 1) — September 2024 (published late September 2024).
• Publisher: British Standards Institution (BSI); this edition also appears distributed locally as STB PD 5500‑2024 + A1‑2024.
• ICS / categories: 23.020.30 (Pressure vessels / gas pressure vessels).
• Edition / version: 2024 edition with Amendment A1:2024 (PD 5500:2024 + A1:2024).
• Number of pages: Approximately 1,086 pages (published consolidated PD 5500:2024 + A1:2024 documents commonly listed at ~1,086 pages).

Scope

The standard applies to unfired welded pressure vessels and pressure parts constructed from carbon, ferritic alloy and austenitic steels and supplemented materials; it covers design rules, material selection, welding and fabrication procedures, non‑destructive examination, pressure testing, marking and documentation necessary to demonstrate safe construction and in‑service integrity. It does not replace specific regulatory conformity routes where harmonized standards are required but provides a comprehensive national code for design and manufacture.

Key topics and requirements

• Design rules for internal and external pressure, including calculation methods for shells, heads and nozzles.
• Material specifications, allowable stresses and material supplements (including duplex and special alloys updates in recent amendments).
• Welding procedure qualifications, welder/operatior qualification, and fusion‑welding requirements.
• Fabrication tolerances, supports (saddles, rings), local load treatment and nozzle reinforcement.
• Inspection and testing: NDE requirements, pressure testing, mechanical testing and in‑service inspection guidance.
• Documentation, certification and marking requirements for traceability and conformity evidence.
• Updates and annual amendments process (A1:2024 introduces targeted technical/material clarifications and errata handling).

Typical use and users

Used by pressure‑vessel designers, fabricators, welding and NDE engineers, third‑party inspection bodies, owners/operators in oil & gas, petrochemical, chemical processing, power generation and food & beverage industries who need a comprehensive national specification for unfired pressure vessels. It is also referenced by regulators and certification bodies where national adoption (STB) or contractual specification requires PD 5500 conformity.

Related standards

Commonly used alongside or compared with EN 13445 (Unfired pressure vessels — European harmonized standard) and the ASME BPVC Section VIII (Rules for construction of pressure vessels). Users often reference these standards when assessing conformity, cross‑checking material rules or selecting an alternative code for international projects.

Keywords

PD 5500, STB PD 5500, unfired pressure vessels, pressure vessel design, welding, inspection, non‑destructive examination, pressure testing, material supplements, BSI.

FAQ

Q: What is this standard?

A: PD 5500:2024 + A1:2024 is the specification for unfired pressure vessels — a UK code published by BSI and made available locally as STB PD 5500‑2024 + A1‑2024 in some jurisdictions. It sets technical requirements for design, manufacture and testing of unfired vessels.

Q: What does it cover?

A: It covers materials, design (internal and external pressure), welding and fabrication, inspection and testing (including NDE and pressure testing), supports and nozzles, documentation and marking for unfired welded pressure vessels.

Q: Who typically uses it?

A: Designers, fabricators, welders and NDE personnel, inspection bodies, plant owners/operators and regulatory/certification organisations in sectors that use pressure vessels (e.g., oil & gas, petrochemical, power generation, chemical and food industries).

Q: Is it current or superseded?

A: The 2024 edition with Amendment A1:2024 is current as a published PD 5500 release. PD 5500 is maintained on a rolling amendment cycle (annual amendments in September); subsequent amendments (for example A2:2025) have been published after A1, so users should check whether later amendments (A2, etc.) apply to their project.

Q: Is it part of a series?

A: Yes — PD 5500 is published as a base edition with periodic inter‑filed amendments (A1, A2, …) and is the UK national pressure‑vessel code maintained by committee PVE/1. It is one of the common national codes alongside EN 13445 (European) and ASME Section VIII (US/international).

Q: What are the key keywords?

A: Pressure vessel, unfired, PD 5500, welding, inspection, design, materials, NDE, pressure testing, BSI, STB.