Piping Related Abbreviations (X)

XH is an abbreviation of EXtra Heavy
and stands for the wall thickness (schedule) of pipes, fittings, and some flanges.

XS is an abbreviation of EXtra Strong
and stands for the wall thickness (schedule) of pipes, fittings, and some flanges.

XXH

XXH is an abbreviation of Double Extra Heavy
and stands for the wall thickness (schedule) of pipes, fittings, and some flanges.

XXS

XXS is an abbreviation of Double EXtra Strong
and stands for the wall thickness (schedule) of pipes, fittings, and some flanges.

Other Abbreviations

Abbreviations Y

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