prEN 1515-4 rev

Flanges and their joints - Bolting - Part 4: Selection of bolting for equipment subject to the Pressure Equipment Directive 97/23/EC prEN 1515-4 rev

Scope

This European Standard is applicable to the selection of bolting for equipment subject to the Pressure
Equipment Directive 97/23/EC.
It specifies standards and additional requirements for dimensions, materials and technical conditions of
delivery for bolting.
The bolting selection covered by this European Standard is regarded to be used for combination with flanges
according to the series EN 1092 (PN designated flanges) and the series EN 1759 (Class designated flanges).
The selection is based on commonly used materials, bolts and nuts. It covers temperature ranges of the
general service of standard flanges (based on PN or Class).
When selecting bolting according to this European Standard it is essential to take into account other
parameters such as type of fluids, corrosion hazards and relaxation at elevated temperatures.
The purpose of this European Standard is to provide a selection of most commonly used bolting types and
bolting material combinations as well a tool for easy selection of suitable bolting for equipment.
It is not the intention to specify all possible applications but to give guidance on the most commonly
applications. According to this, e.g. application limits for material in the creep range are not explicitly covered
in this European Standard but some bolting materials listed (see Table 3, footnote h) are suitable to be used in
this temperature range. Wherever the starting material standard provides mechanical properties for this
temperature range respective reference is made in Table 3.

Related legislation

Legislation related to this standard