API Spec 20F PDF

API Spec 20F – Corrosion Resistant Bolting for Use in the Petroleum and Natural Gas Industries, Second Edition, Includes Errata 1 (2020) and Addendum 1 (2021)

This standard specifies requirements for the qualification,production, and documentation of corrosion-resistantbolting used in the petroleum and natural gas industries.

This standard applies when referenced by an applicableAPI equipment standard or otherwise specified as arequirement for compliance.

This standard establishes requirements for two boltingspecification levels (BSL). These two BSL designationsdefine different levels of technical, quality, andqualification requirements: BSL-2 and BSL-3. The BSLsare numbered in increasing levels of requirements inorder to reflect increasing technical, quality, andqualification criteria. BSL-2 and BSL-3 are intended to becomparable to BSL-2 and BSL-3 as found in API 20E.BSL-1 is omitted from this standard.

This standard covers the following product forms,processes, and sizes:

a) machined studs;

b) machined bolts, screws, and nuts;

c) cold-formed bolts, screws, and nuts with cut orcold-formed threads;

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) nominaldiameter; i) hot-formed nuts ≥1.5 in. (38.1 mm) nominaldiameter.