M00044708
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API Spec 20E Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries, First Edition
standard by American Petroleum Institute, 08/01/2012
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API SPECIFICATION 20E FIRST EDITION, AUGUST 2012
ERRATA, OCTOBER 2014
API SPECIFICATION 20E FIRST EDITION, AUGUST 2012
ERRATA, OCTOBER 2014
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iii
page
Scope. 1
Purpose 1
Applicability 1
Bolting Specification Levels (BSL) 1
Bolting Types 1
Normative References 1
Terms, Definitions and Abbreviations 3
Terms and Definitions 3
Abbreviations 4
Qualification Bolting 4
General 4
Qualification Testing. 4
Materials and Dimensions 5
Acceptance of Qualification Bolting 5
Records of Qualification 6
Limits of Bolting Qualification 6
Production of Qualified Bolting 7
Qualification of Procurement Sources for Raw Material 7
Material Specifications 8
Manufacturing Procedure Specification 8
Raw Material 9
Chemical Analysis 10
Mechanical Properties 10
Metallurgical Requirements 10
Examination and Test Requirements 12
Nondestructive Examination Requirements 13
Dimensional and Visual Inspection 14
Calibration Systems 14
Test Report 14
Marking Requirements 15
ASTM Product Marking 15
Marking Required by this Standard 15
Record Retention 15
Storage and Shipping 15
Annex A (normative) Supplementary Requirements 16
Annex B (informative) API Monogram Program 17
V
Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries
This standard specifies requirements for the qualification, production and documentation of alloy and carbon steel bolting used in the petroleum and natural gas industries.
This standard applies when referenced by an applicable API equipment standard or otherwise specified as a requirement for compliance. An annex for supplemental requirements that may be invoked by the pur- chaser is included.
This standard establishes requirements for three bolting specification levels (BSL). These three BSL des- ignations define different levels of technical, quality and qualification requirements, BSL-1, BSL-2, and BSL-3. The BSLs are numbered in increasing levels of severity in order to reflect increasing technical, quality and qualification criteria.
This standard covers the following finished product forms, processes, and sizes:
machined studs;
machined bolts, screws and nuts;
cold formed bolts, screws, and nuts (BSL-1 only);
hot formed bolts and screws < 1.5 in. (38.1 mm) nominal diameter;
hot formed bolts and screws ≥ 1.5 in. (38.1 mm) nominal diameter;
roll threaded studs, bolts, and screws < 1.5 in. (38.1 mm) diameter;
roll threaded studs, bolts, and screws ≥ 1.5 in. (38.1 mm) diameter;
hot formed nuts < 1.5 in. (38.1 mm) nominal diameter;
hot formed nuts ≥ 1.5 in. (38.1 mm) nominal diameter.
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the reference document (including amendments) applies.
API 6A, 20th Edition, Specification for Wellhead and Christmas Tree Equipment
1