3.1.8 Protection against pressure related hazards
The Pressure Equipment Directive [13] applies to most pressure-containing equipment. The directive requires the following aspects to be addressed:
- Strength of equipment;
- Provisions to ensure safe handling and operation;
- Means of examination;
- Means of draining and venting;
- Materials for pressure vessels.
- Wear
- Assemblies
- Provisions for filling and discharge
- Protection against exceeding the allowable limits of pressure equipment
- Safety accessories
- Manufacturing procedures
- Marking and labelling
- Operating instructions
At elevated temperatures and pressures, hydrogen attacks mild steels severely, causing decarburisation and embrittlement. This is a serious concern in any situation involving storage or transfer of hydrogen gas under pressure. Proper material selection, e.g. special alloy steels, and technology is required to prevent embrittlement [7].