What is BS EN 1515-4 about?
BS EN 1515-4 is the fourth part of the multi-series standard BS EN 1515. BS EN 1515-4 is applicable to the selection of bolting for flanged joints on equipment subject to the Pressure Equipment Directive 2014/68/EU.
BS EN 1515-4 specifies standards and additional requirements for dimensions, material properties and technical conditions of delivery for bolting.
BS EN 1515-4 takes into account environmental conditions and other parameters including type of fluids, corrosion hazards, sour service, low-temperature brittle failure and relaxation at elevated temperatures.
BS EN 1515-4 covers common temperature ranges of the general service of flanges.
Who is BS EN 1515-4 for?
BS EN 1515-4 on flanges and their joints is relevant to:
- Manufacturers of bolts, screws and flanges
- Fabricators
- Welders
- Mechanical engineer
- Quality testing departments
Why should you use BS EN 1515-4?
Bolted joints are one of the most common elements in construction and machine design. They consist of fasteners that capture and join other parts and are secured with the mating of screw threads. BS EN 1515-4 sets standards and requirements for dimensions, material properties and technical conditions of flanges and bolts.
BS EN 1515-4 provides you with information about the selection of bolting types and bolting material combinations for a certain application of the equipment for which the bolting is intended to be used. The technical conditions of bolting and related material’s delivery, and the marking requirements are included in this standard. It covers all major parameters such as maximum/minimum allowable temperature, required bolt load, tightening method and resultant stresses, type of fluids, corrosion hazards and type and material of gasket.
Best industry guidance in BS EN 1515-4 will enable you to make better decisions regarding the bolting types and bolting material combinations as per your specific application need. This will not only provide the end-user with assurance on quality but also enhance product development initiatives.
What’s changed since the last update?
BS EN 1515-4:2021 supersedes EN 1515-4:2009. BS EN 1515-4:2021 includes some technical changes with respect to EN 1515-4:2009. These include:
- Explanation of requirements for starting material in accordance to EN 10269:2013
- Some temperature ranges and assignment of material groups are amended in Table 3
- Option for traceability by means of lot identification marking instead of inspection documents
- Separate requirements have been given to bolting other than those in EN 10269:2013
- Requirements for prevention of brittle fracture have been updated