ASME B16.4-2021
Gray Iron Threaded Fittings classes 125 and 250

Standard No.

ASME B16.4-2021

Release Date

2022

Published By

American Society of Mechanical Engineers (ASME)

Latest

ASME B16.4-2021

Replace

ASME B16.4:2016

Scope

This Standard for gray iron threaded fittings, Classes 125 and 250, covers (a) pressure–temperature ratings (b) sizes and method of designating openings of reducing fittings (c) marking (d) material (e) dimensions and tolerances (f) threading (g) coatings 本标准适用于灰铁螺纹接头，等级 125 和 250，涵盖 （a） 压力-温度额定值 （b） 减速配件开口的尺寸和指定方法 （c） 标记 （d） 材料 （e） 尺寸和公差 （f） 螺纹加工 （g） 涂料

ASME B16.4-2021 Referenced Document

• ASME B1.20.1 Pipe Threads@ General Purpose (Inch)
• ASME B16.14 Ferrous Pipe Plugs@ Bushings@ and Locknuts with Pipe Threads
• ASTM A126-04(2019) Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings
• ASTM A153/A153M-16a Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware*， 2024-04-21 Update
• ASTM B633-19 Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel*， 2024-04-21 Update
• ASTM E29-13(2019) Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• ISO 9000:2015 Quality management systems - Fundamentals and vocabulary
• ISO 9001:2015 Quality management systems - Requirements
• ISO 9004:2018 Quality management and quality system elements — Part 3: Guidelines for processed materials

ASME B16.4-2021 history

• 2022 ASME B16.4-2021 Gray Iron Threaded Fittings classes 125 and 250
• 2016 ASME B16.4-2016 Gray Iron Threaded Fittings: Classes 125 and 150
• 2011 ASME B16.4-2011 Gray Iron Threaded Fittings: Classes 125 and 250
• 2006 ASME B16.4-2006 Gray Iron Threaded Fittings Classes 125 and 250
• 1998 ASME B16.4-1998 Gray iron threaded fittings; Classes 125 and 250
• 1992 ASME B16.4-1992 Gray iron threaded fittings

ASME B16.4-2021 -All Parts