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Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries
Includes all amendments and changes through Errata , May 2022
Published by American Petroleum Institute, 05/01/2022
API 20E, 2nd Edition – Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries
API 20E specifies requirements for the qualification, production, and documentation of alloy and carbon steel bolting used in the petroleum and natural gas industries.
API 20E applies when referenced by an applicable API equipment standard or otherwise specified as a requirement for compliance.
Bolting Specification Levels
This standard establishes requirements for three bolting specification levels (BSLs). These three BSL designations define different levels of technical, quality, and qualification requirements, BSL-1, BSL-2, and BSL-3. The BSLs are numbered in increasing levels of requirements in order to reflect increasing technical, quality, and qualification criteria.
This standard covers the following finished product forms, processes, and sizes:
a) machined studs;
b) machined bolts, screws, and nuts;
c) cold formed bolts, screws, and nuts with cut or cold formed threads (BSL-1 only);
d) hot formed bolts and screws <1.5 in. (38.1 mm) nominal diameter;
e) hot formed bolts and screws ≥1.5 in. (38.1 mm) nominal diameter;
f) roll threaded studs, bolts, and screws <1.5 in. (38.1 mm) diameter;
g) roll threaded studs, bolts, and screws ≥1.5 in. (38.1 mm) diameter;
h) hot formed nuts <1.5 in. (38.1 mm) nominal diameter;
i) hot formed nuts ≥1.5 in. (38.1 mm) nominal diameter.
NOTE Alternate geometry components made in accordance with this specification may be specified by the purchaser.
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|Publisher||American Petroleum Institute (API)|