API SPEC 20F-2018 pdf download

API SPEC 20F-2018 pdf download.Corrosion-resistant Bolting for Use in the Petroleum and Natural Gas Industries.
1 1.1 Scope Purpose This standard specifies requirements for the qualification, production, and documentation of corrosion-resistant bolting used in the petroleum and natural gas industries. 1.2 Applicability This standard applies when referenced by an applicable API equipment standard or otherwise specified as a requirement for compliance. 1.3 Bolting Specification Levels (BSL) This standard establishes requirements for two bolting specification levels (BSL). These two BSL designations define different levels of technical, quality, and qualification requirements: BSL-2 and BSL-3. The BSLs are numbered in increasing levels of requirements in order to reflect increasing technical, quality, and qualification criteria. BSL-2 and BSL-3 are intended to be comparable to BSL-2 and BSL-3, as found in API 20E. BSL-1 is omitted from this standard. 1.4 Bolting Types for Qualification This standard covers the following product forms, processes, and sizes: a) b) c) d) e) f) g) h) i) 2 machined studs; machined bolts, screws, and nuts; cold-formed bolts, screws, and nuts with cut or cold-formed threads; 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. Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document applies (including any addenda/errata). API Specification Q1 , Specification for Quality Management System Requirements for Manufacturing Organizations for the Petroleum and Natural Gas Industry
API 6A, Specification for Wellhead and Christmas Tree Equipment API 6HT, Heat Treatment and Testing of Carbon and Low Alloy Steel Large Cross Section and Critical Section Components API Standard 6ACRA, Age-hardened Nickel-based Alloys for Oil and Gas Drilling and Production Equipment ANSI/NCSL Z540.3 1 , Requirements for the Calibration of Measuring and Test Equipment ASTM A370 2 , Standard Test Methods and Definitions for Mechanical Testing of Steel Products ASTM A453, Standard Specification for High-Temperature Bolting, with Expansion Coefficients Comparable to Austenitic Stainless Steels ASTM A751 , Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products ASTM A962-1 7, Standard Specification for Common Requirements for Bolting Intended for Use at Any Temperature from Cryogenic to the Creep Range ASTM E1 0, Standard Test Method for Brinell Hardness of Metallic Materials ASTM E1 8, Standard Test Methods for Rockwell Hardness of Metallic Materials ASTM E354 Standard Method for Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel and Cobalt Alloys ASTM E1 476, Standard Guide for Metals Identification, Grade Verification, and Sorting ASTM F788, Standard Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series ASTM F81 2, Standard Specification for Surface Discontinuities of Nuts, Inch and Metric Series
4 4.1 Qualification Bolting General 4.1.1 This standard states the requirements for two bolting specification levels (BSL) and nine bolting types. The manufacturer may qualify to one or more of the bolting types listed in 1 .4 and to one or both BSLs. Each individual bolting type shall be qualified. Qualification to the higher BSL shall qualify to the lower BSL. The following paragraphs describe the conditions that, when met, allow the bolting to meet the appropriate bolting type and BSL classification level. 4.1.2 Qualification bolts and nuts shall be produced from raw material procured from an approved supplier as defined in 5.1 and manufactured in accordance with an applicable manufacturing process specification (MPS) for a bolting material. 4.2 4.2.1 Qualification Testing Qualification bolting shall be tested and evaluated by the bolting manufacturer in order to establish qualification to the bolting types listed in 1 .4 and a BSL. Qualification bolting shall meet all of the requirements indicated in Table 1 for the applicable sections of this standard. 4.2.2 All required tests, including those certified by the raw material supplier, shall be performed by a laboratory qualified in accordance with ISO/IEC 1 7025. For ultrasonic examination, magnetic particle inspection, and liquid penetrant inspection, qualification to ISO/IEC 1 7020 is an acceptable alternative to ISO/IEC 1 7025. 4.2.3 Qualification may be performed on parts specifically manufactured for qualification or random parts selected from a production lot. A sufficient number of parts shall be used to provide adequate material for all required tests.