BS EN ISO 12628-2022 + A1-2025 PDF

Full title and description

BS EN ISO 12628:2022 + A1:2025 — Thermal insulating products for building equipment and industrial installations — Determination of dimensions, squareness and linearity of preformed pipe insulation. This combined designation indicates the ISO international standard (edition 2022) together with Amendment 1 published in 2025 and the British adoption as a BS/EN/ISO document for use in the UK market.

Abstract

This document specifies the equipment and procedures for determining the dimensions, squareness and linearity of preformed pipe insulation supplied in one piece, half sections or segments. It is applicable to thermal insulating products used for building equipment and industrial installations and provides the measurement methods and reporting requirements necessary to assess conformity to dimensional and geometric tolerances.

General information

• Status: Published / Current (ISO 12628:2022 with Amendment A1:2025; adopted as BS EN ISO 12628:2022+A1:2025).
• Publication date: ISO original edition: August 2022; Amendment 1 (A1): published June 2025; BS adoption published 23 June 2025.
• Publisher: International Organization for Standardization (ISO) — original text; Amendment published by ISO (2025); British Standards Institution (BSI) — UK/EN adoption (BS EN ISO 12628:2022+A1:2025).
• ICS / categories: 91.100.60 — Thermal and sound insulating materials / Thermal insulation products.
• Edition / version: Edition 2 (ISO 12628:2022) — amended by A1:2025; adopted as BS EN ISO 12628:2022+A1:2025.
• Number of pages: Combined BS/EN/ISO publication (with A1) published as BS EN ISO 12628:2022+A1:2025 — 18 pages (BS combined publication).

Scope

The standard covers the measurement methods, required equipment and procedural steps to determine the overall dimensions, squareness (right-angle conformity of sections) and linearity (straightness) of preformed pipe insulation pieces (including full sections, half sections and segmented pieces). It is intended for thermal insulating products used on piping and associated building and industrial installations and applies where dimensional conformity and geometric tolerances need to be assessed for production control, acceptance testing and product specification.

Key topics and requirements

• Definitions and terminology for preformed pipe insulation pieces (one-piece, half sections, segments).
• Required measurement equipment (calipers, templates, straightedges, squareness gauges and fixtures) and calibration/accuracy requirements.
• Specimen preparation and conditioning prior to measurement (environmental conditions and stabilization).
• Procedures for measuring outer/inner dimensions, wall thickness where applicable, squareness (perpendicularity of faces) and linearity (straightness over specified lengths).
• Sampling rules: selection of specimens from production batches for dimensional checks.
• Tolerances, acceptance criteria and reporting format — how to record measurements and report nonconformities.
• Information to be supplied with products (marking/identification and documentation of measured dimensions where required by purchaser/specification).

Typical use and users

Manufacturers of preformed pipe insulation, independent testing laboratories, product conformity assessors, quality managers in HVAC and industrial insulation supply chains, specifiers and procurement teams in construction and industrial projects, and installers who need to confirm parts fit and meet dimensional tolerances for reliable thermal and mechanical performance.

Related standards

Related documents and neighbouring standards include other ISO/CEN standards covering thermal insulating products and test methods (examples: ISO 18098 series for apparent density of preformed pipe insulation and other specific test standards for thermal insulation products). The BS/EN/ISO adoption replaces or updates previous national standards such as BS EN 13467:2018 in the UK context and supersedes earlier versions of ISO 12628 (for example ISO 12628:2011).

Keywords

preformed pipe insulation, thermal insulation, dimensions, squareness, linearity, measurement procedure, tolerances, HVAC insulation, insulation testing, ISO 12628, A1:2025, BS EN ISO.

FAQ

Q: What is this standard?

A: ISO 12628 (edition 2022) with Amendment A1 (2025) specifies methods to determine dimensions, squareness and linearity of preformed pipe insulation; the UK/EN adoption is published as BS EN ISO 12628:2022+A1:2025.

Q: What does it cover?

A: It covers required equipment, specimen conditioning, step‑by‑step measurement procedures for outer/inner dimensions, squareness and straightness, sampling and reporting practices applicable to preformed pipe insulation supplied as whole sections, half sections or segments.

Q: Who typically uses it?

A: Insulation manufacturers, quality and production engineers, independent test laboratories, product certifiers, procurers and specifiers in building services and industrial installations, and installers verifying fit and dimensional compliance.

Q: Is it current or superseded?

A: The ISO 2022 edition is current and was amended by A1 in 2025; the amended text has been adopted as BS EN ISO 12628:2022+A1:2025 (published in June 2025) and is the active document for measurement and dimensional conformity. Earlier national or international editions (for example ISO 12628:2011) have been superseded.

Q: Is it part of a series?

A: Yes — ISO 12628 is part of the family of standards addressing thermal insulating products for building equipment and industrial installations; other related standards in the field cover apparent density, thermal performance, fire behaviour and other test methods relevant to preformed insulation products.

Q: What are the key keywords?

A: Preformed pipe insulation, dimensions, squareness, linearity, measurement, tolerances, thermal insulating products, ISO 12628, amendment A1:2025, BS EN ISO.