Pipe Flanges and Flanged Fittings

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Sectional Committee B16 was formed in 1920 by the American Engineering Standards Committee [becoming the American Standards Associations (ASA)] to unify and produce standards for pipe flanges and fittings (and later for valves and gaskets). ASME, the Heating and Piping Contractors National Association [now the Mechanical Contractors Association of America (MCAA)], and the Manufacturers Standardization Society of the Valves and Fittings Industry were all co-sponsors of the B16 Committee (MSS). Cosponsoring organizations were eventually renamed secretariat organizations.

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The Standard's use revealed the necessity for companion flange hub measurements as well as other adjustments, such as the re-rating of 250-lb and 1,350-lb flanges and the invention of flanged fittings with integral bases. The factors that determine the rigidity of flanges and flange hubs were investigated. ASA B16E-1932 was assigned to the updated edition.

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Contents in Pipe Flanges and Flanged Fittings

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1 Scope 

2 Pressure–Temperature Ratings

3 Component Size

4 Marking

5 Materials

6 Dimensions 

7 Tolerances

8 Pressure Testing