This specification of our fittings covers very dark and hot-dipped galvanized hot-formed welded and seamless carbon steels which are circular, rectangular, or exceptional shape structure. Exceptional form and dimensions of tubing are allowed to be supplied so that such tubing obeys all other obligations of this specification. Test specimens will be in agreement with other ASTM articles.

The tubing will be manufactured either by seamless, furnace-butt welding. Testing of the experiment specimens will include one stress check from an extent of each of the tubing comprising each lot. If any lot fails the mechanical check, it will be turned down or retested utilizing added tubing of twice the original number of allotment .The allotment will be acceptable if the outcomes of all such retests conform to the specified obligations. Pan China Company is the leading pipe fittings manufacturer of the time. They have hundreds of varieties of pipe nipples available for sale.