How to make cheap butt welding fittings ANSI B16.9?
60% of the factories buy pipes from small
factories, price about 5% cheaper.
These pipes don’t have even wall thickness,
the result is the fittings wall thickness will go below the minus tolerance
requested by ANSI B16.9.
Moreover, fittings made from these pipes
may have defects, such as lamination, external spirals, cracks and other
problems. After grinded and painted, these defects are invisible; but there is
big risk during service.
Another 35% of the factories buy used pipe,
wasted pipes, broken pipes or pipe ends to produce fittings. Price about 15%
Fittings made from these material are not
qualified: neither chemical composition nor mechanical properties are good. For
this reason, the fittings may fail to be welded to pipeline; or fittings are
broken easily; or leakage due to invisible defects.
Qingdao LOLO only buys
pipes from first-class pipe plants in China, such as Baosteel,Baotou Steel, Tsingshan, etc.
We control fittings quality from the beginning: all pipes are tested and
guaranteed excellent physical and chemical properties and even wall thickness.
We supply mill test certificate issued by
pipe plants to our clients’ requirement.