SMYS Rating Prefix

[phllp581]

Can someone explain the prefix letter on SMYS ratings. For example I have always seen pipe with an X (i.e. X42, X52). But I have seen fittings listed as F52 or Y60. What is the difference between the prefixes?

 

[bimr]

The American Petroleum Institute specification API 5L covers seamless and welded steel line pipe. This is steel pipe for pipeline transportation systems in the petroleum and natural gas industries. API 5L is suitable for conveying gas, water, and oil. Size range is limited only by manufacturer’s capabilities.

Specifications for API 5L adhere to the International Organization for Standardization ISO 3183, which standardizes pipeline transportation systems within the materials, equipment and offshore structures for petroleum, petrochemical, and natural gas industries. The technical committee authoring the standards recognized that there are two basic Product Specifications Levels (PSL) of technical requirements and therefore developed PSL 1 and PSL 2. PSL 1 is a standard quality for line pipe where PSL 2 contains additional chemical, mechanical properties, and testing requirements.

Grades covered by this specification are A25 ,A ,B (and the following "X" Grades), X42, X46, X52, X56, X60, X65, X70, X80. The two digit number following the "X" indicates the Minimum Yield Strength (in 000's psi) of pipe produced to this grade.

- See more at:

http://www.fedsteel.com/products/ca...-seamless-line-pipe.html#sthash.OJdxh939.dpuf

http://www.pdhonline.org/courses/m184/Material Data Sheets for piping M-630.pdf

 

[LittleInch]

Fittings for higher strength pipe are actually made to a different specification, in this case astm a694. The F is a grade which probably stands for forging.

The Y will be to a different specification, probably some sort of plate

Pipe to 3183 is now referred to by the yield strength in MPa, so X52 should now be called L360. 3183 has a number of letter designations for pipe strength which means different things.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[BigInch]

See page 2

https://law.resource.org/pub/us/cfr/ibr/004/mss.sp-44.1996.pdf