MSS IBR Standards

	Below is a listing of MSS standards incorporated by reference in the Code of Federal Regulations. Click on “View Only” to access a read-only copy of a referenced MSS standard. Please note that prior to accessing the standards, you must install the FileOpen Plug-In. For more information, read the FAQ page.

MSS SP-44-2010 Steel Pipeline Flanges (incorporated by reference in 49 CFR §192)

ANSI/MSS SP-44-2019 Steel Pipeline Flanges (ANSI/MSS SP-44-2019 edition is PROPOSED to replace currently referenced 2010 edition in 49 CFR §192)

MSS SP-75-2008 Specification for High-Test, Wrought, Butt-Welding Fittings (incorporated by reference in 49 CFR §195)

MSS SP-75-2019 High-Strength, Wrought, Butt-Welding Fittings (MSS SP-75-2019 edition is PROPOSED to replace currently referenced 2008 edition in 49 CFR §195)

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