How to use ASTM A234 WP11 pipe fitting?

ASTM A234 WP11 pipe fitting have butt welding pipe ends,which commonly used to be welded with the ASTM A335 P11 steel pipes,and ASTM A182 F11 forged flanges and pipe fittings.
ASTM A234 WP11 is the most widely used pipe fittings material in high temperature conditions,it have better performance for the abrasive resistance and corrosion resistance than carbon steel.

Grade WP11 have three classes,class1,class 2 and class3.They have different chemical compositions and mechanical properties. According to the standard,there are S and W marking for the WP11 pipe fittings,they means “seamless” and “welded”.
The ASTM A234 WP11 pipe fitting could be used in industry field,like oil&gas,power plant,water treatment,chemical-industry,steel construction,chemical industrial etc.
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