BS 8701:2016

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Samples
8 Surface preparation
9 Procedure for test specimens with internal loading
10 Expression of results
Annexes
Annex A (normative) - Ultrasonic examination of pipe,
        plate and welds during accelerated laboratory
        tests
Annex B (normative) - Ring loading
Annex C (informative) - Typical internal and external
        load application rigs for use in the full ring test
Annex D (normative) - Chemistry of test solutions
Annex E (informative) - Analysis of test solution - iodimetric
        titration procedure
Annex F (informative) - Illustrated summary of the
        full ring test procedure
Annex G (informative) - Hydrogen sulfide (H[2]s)
        health and safety considerations
Annex H (informative) - Sample identification and
        test record, Form 1
Annex I (informative) - Sample identification and
        test record, Form 2
Annex J (informative) - Acceptance criteria
Annex K (informative) - Sulfide stress corrosion
        (SSC) and hydrogen induced cracking (HIC)
Annex L (informative) - Explanatory notes on test
        method: Galvanic Coupling
Annex M (informative) - Modified test procedure
        for externally loaded test
        specimens (Diameter <12 in. [305 mm])
Annex N (informative) - Magnetic particular inspection
        (MPI) procedure
Bibliography

Provides a method for determining the susceptibility to cracking of steel pipes in sour service.

This British Standard gives a method for determining the susceptibility to cracking of steel pipes in sour service.

This British Standard utilizes a tubular specimen comprising a full circumferential ring. The test method applies to any pipe with or without seam (longitudinal or spiral) or girth weld (with or without filler).

NOTE1 The specimen is usually a pipe but can also consist of flange neck or section of a bend, or other tubular component or a combination of the above.

This British Standard provides guidance on determination of specimen size to ensure it retains residual stresses from manufacture and welding.

NOTE2 See Clause7 for specimen sizes.

The method utilizes ovalization to simulate hoop stress, using mechanical loading on a tubular form. The specimen is subjected to single sided exposure to the sour test environment.

NOTE3 The test also allows measurement of hydrogen permeation rates which can provide useful information, such as highlighting the effects of galvanic coupling between materials of apparent compatibility.