API TR 21TR2
API TR 21TR2: S-N Fatigue Design Guidelines and Test Data for Bolts (Not Current)
CDN $186.00
Description
New API-backed research on the fatigue life of bolts used in underwater natural gas and oil infrastructure—including critical blowout prevention equipment—resulted in the publication of this technical report, a key advancement in industry’s continued efforts to protect workers and the environment from potential problems associated with bolting fatigue in subsea structures. The test program detailed in this technical report was developed to obtain bolting material fatigue data required to perform design verification analysis of fatigue-sensitive bolts to assure accurate design life estimation. The bolting fatigue testing program provided S-N fatigue curves for three alternating stress ranges in air and saltwater with cathodic protection (CP) and for bolt sizes of 1 in., 2 in. (Grade L7), and 3 in. (Grade L43). S-N curves are used to determine the number of cycles (N) required to test a product to failure at a given stress (S).
** Replaced with Second Edition **
Edition
1
Published Date
2022-03-08
Status
Not Current
Pages
32
Language
English
Format
Secure PDF
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Abstract
New API-backed research on the fatigue life of bolts used in underwater natural gas and oil infrastructure—including critical blowout prevention equipment—resulted in the publication of this technical report, a key advancement in industry’s continued efforts to protect workers and the environment from potential problems associated with bolting fatigue in subsea structures. The test program detailed in this technical report was developed to obtain bolting material fatigue data required to perform design verification analysis of fatigue-sensitive bolts to assure accurate design life estimation. The bolting fatigue testing program provided S-N fatigue curves for three alternating stress ranges in air and saltwater with cathodic protection (CP) and for bolt sizes of 1 in., 2 in. (Grade L7), and 3 in. (Grade L43). S-N curves are used to determine the number of cycles (N) required to test a product to failure at a given stress (S). ** Replaced with Second Edition **
