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Fitting stamped WPL6, is it A420?

Fitting stamped WPL6, is it A420?

Fitting stamped WPL6, is it A420?

(OP)
We often order ASTM A420 WPL6 butt-weld pipe fittings for low temp service.  Lately, we have received fittings from pipe vendors that are only stamped with the heat # and WPL6.  There is no A420 designation on the fitting.  These are often import fittings (the fittings I looked at were from Taiwan and Austria).

My question is this.  Does the WPL6 stamp imply that the fitting was made under ASTM A420 guidelines?  I realize that there are different WPL grades for impact toughness, but is the WPL designation specific to A420?

Thanks

RE: Fitting stamped WPL6, is it A420?

Yes.

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