Petroleum and natural gas industries. Drilling and production equipment. Subsurface barrier valves and related equipment1 Scope This International Standard provides the requirements for subsurface barrier valves and related equipment as they are defined herein for use in the petroleum and natural gas industries. Included are the requirements for design, design validation, manufacturing, functional evaluation, repair, redress, handling and storage. Subsurface barrier valves provide a means of isolating the formation or creating a barrier in the tubular to facilitate the

and withdrawn documents for handling modifications of technical documents for railways

Why should you use BS EN 13282-1 - HRB conformity criteria

BS EN 4811 for 4 holes gasket seal with fluorocarbon seal on aluminium plate is helpful for:

It is not the purpose of this European Standard to standardise the end user classification or to conflict with the concept systems embedded in national practice and languages

cross wall constructions

you can efficiently conduct the flame atomic absorption spectrometric method for the zinc and zinc alloys

Test for flammability of anaesthetic agents

using nomadic and portable devices for:

This standard aims to help users by:

BS EN 2540 provides you guidance on chemical composition

2 mg/100 g (α-tocopherol)

Owners of offshore cranes