Welding Fabrication Standards - EWF

Welding Fabrication Standards Page 59
Figure 18 – Lining of a buried pipeline in the nearby of a chemical plant
Where buried piping subject to this standard connects to piping installed under other jurisdiction
such as pipelines, the transition should be made at a closing element e.g. an isolating or regulating
valve separating the two sections, that should be close to the boundary of the industrial site, but
may be inside or outside the boundary.
The standard reports therefore some additional requirements, as relates to:
− safety
− depth of installation;
− pipes marking and recording;
− design and calculation;
− installation (trenches, pipe laying and back filling);
− sleeves or casings;
− corrosion protection;
− examination and testing.
As concerns welding activities, no specific requirements are given.
5.7 CR 13445 – 7: Guidance on the use of conformity procedures
This Technical Report gives guidance on the use of conformity assessment procedures for
industrial piping and pipelines as covered by Article 1, § 2.1.1 of the Pressure Equipment Directive
(PED).
The PED requires all pressure equipment falling within its scope to have its design and
manufacture assessed for conformity in accordance with a series of conformity assessment
procedures given in Article 10 of the Directive, and in particular according to its Annex III.
Therefore the following information are given:
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