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Background Information on the Bolt Tightening Qualification Procedure (BTQP)
Abstract The execution of preloaded stainless steel bolting assemblies is currently only permitted according to EN 1090-2 if procedure tests are carried out. Nevertheless, it has be shown in various previously and recently conducted studies that preloading of bolting assemblies and threaded rods made of stainless steel is in principle feasible and that reliable tightening procedures can be developed. Thus, there is an urgent need for clear guidance and normative implementation as EN 1090-2 does not give any procedure to qualify these bolting assemblies for preloading. This paper aims to present background information on the Bolt Tightening Qualification Procedure (BTQP) for stainless steel bolting assemblies, which was already implemented in the recently drafted ISO 17607-6.
Highlights EN 1090–2 only permits the use of stainless steel if procedure tests are carried out. EN 1090–2 does not give any guidance on how to perform procedure tests. The Bolt Tightening Qualification Procedure (BTQP) BTQP does give guidance on how to qualify bolting assemblies for preloading. The BTQP covers the initial parameters, determination of tightening parameters as wells as inspection requirements.
Background Information on the Bolt Tightening Qualification Procedure (BTQP)
Abstract The execution of preloaded stainless steel bolting assemblies is currently only permitted according to EN 1090-2 if procedure tests are carried out. Nevertheless, it has be shown in various previously and recently conducted studies that preloading of bolting assemblies and threaded rods made of stainless steel is in principle feasible and that reliable tightening procedures can be developed. Thus, there is an urgent need for clear guidance and normative implementation as EN 1090-2 does not give any procedure to qualify these bolting assemblies for preloading. This paper aims to present background information on the Bolt Tightening Qualification Procedure (BTQP) for stainless steel bolting assemblies, which was already implemented in the recently drafted ISO 17607-6.
Highlights EN 1090–2 only permits the use of stainless steel if procedure tests are carried out. EN 1090–2 does not give any guidance on how to perform procedure tests. The Bolt Tightening Qualification Procedure (BTQP) BTQP does give guidance on how to qualify bolting assemblies for preloading. The BTQP covers the initial parameters, determination of tightening parameters as wells as inspection requirements.
Background Information on the Bolt Tightening Qualification Procedure (BTQP)
Jungbluth, Dominik (author) / Abraham, Christoph (author) / Stranghöner, Natalie (author)
2023-07-13
Article (Journal)
Electronic Resource
English
ANCHOR BOLT TIGHTENING STRUCTURE, AND METHOD FOR TIGHTENING ANCHOR BOLT
| European Patent Office | 2019