EN ISO 228-2:2003 PDF

Name: EN ISO 228-2:2003 — Pipe threads where pressure-tight joints are not made on the threads - Part 2: Verification by means of limit gauges (ISO 228-2:1987)
SKU: EN ISO 228-2:2003
Price: 60.09 EUR
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Pipe threads where pressure-tight joints are not made on the threads - Part 2: Verification by means of limit gauges (ISO 228-2:1987)

Название (английский):

EN ISO 228-2:2003

Pipe threads where pressure-tight joints are not made on the threads - Part 2: Verification by means of limit gauges (ISO 228-2:1987)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 15
Дата публикации:: 19 февраля 2003 г.
Издание:: CEN EN 228 edition 1 version 1
ICS:: 21.040.30

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Описание (английский):

This second edition cancals and replaces the first edition (1980). Specifies the verification of cylindrical threads, the dimensions and tolerances of which are given in ISO 228-1. Since this 55o profile has different elements to be verified, it is necessary to provide for several GO and several NOT GO gouges.

Abstract

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Стандарты, упомянутые в описании

Overview

EN ISO 228-2:2003 (ISO 228-2:1987) titled Pipe threads where pressure‑tight joints are not made on the threads - Part 2: Verification by means of limit gauges specifies the verification methods for cylindrical pipe threads using limit gauges. This European adoption cancels and replaces the first edition and complements EN/ISO 228‑1, which defines the thread dimensions and tolerances. The standard addresses the particular needs of the 55° thread profile used for non pressure‑tight pipe connections and requires multiple GO and NOT GO gauges to verify different profile elements.

Key topics

Scope and purpose: Verification of cylindrical pipe threads (as defined in ISO 228‑1) by means of limit gauges rather than making pressure‑tight joints on the threads.

Gauge types and function:

GO threaded plug and ring gauges - check the maximum material limit (virtual pitch diameter) and ensure adequate flank/crest/root form.
NOT GO threaded plug and ring gauges - check the minimum material limit and prevent oversize pitch diameters.
Wear check plugs - confirm that GO/NOT GO gauges remain within allowable wear limits.

Verification principles: Gauging follows established metrological practices (Taylor principle for GO checks), and includes checks for pitch diameter, major/minor diameters, flank form and rounding at crest/root.

Multiple gauge requirements: Because the 55° thread profile has distinct elements to verify, several GO and several NOT GO gauges (and associated relief/clearance features) are required.

Use and control: Procedures for using gauges by hand (number of turns allowed when gauging), periodic control of gauge wear, and acceptance criteria for threaded parts and gauges.

Applications

Quality control and production inspection of threaded pipe fittings and connectors where sealing is achieved by a seal or gasket (not by the thread).

Manufacturers of pipes, fittings and valves who must ensure interchangeability and dimensional conformance to ISO 228 series.

Gauge manufacturers and calibration laboratories that produce and verify GO/NOT GO ring and plug gauges and wear check plugs.

Industrial sectors using threaded pipe connections in non‑pressure sealing applications (machinery, instrumentation, general plumbing and assembly), referencing ISO 1179 where applicable.

Related standards

EN/ISO 228‑1 - Designation, dimensions and tolerances for cylindrical pipe threads (complements Part 2).

ISO 1502 - General-purpose metric screw thread gauging practices referenced for Taylor principle and symbols.

ISO 1179 - Example industrial applications for pipe connections.

EN ISO 228‑2:2003 is essential for suppliers and inspectors who need consistent, repeatable verification of cylindrical pipe threads using limit gauges, ensuring interchangeability and compliance across international manufacturing and inspection processes.

EN ISO 228-2:2003 PDF

Abstract

Похожие стандарты

Overview

Key topics

Applications

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