the pipe fitting rroduced by our company has smooth surface,high density, no white month, and high strength, which can be used to produce DIn19522/EN877,iso 6954,GB12772,ASTMA888,CISPI301and KSD4307standard products, the 2000edition of the DIN19522/EN877is administered, which is the modified edition of the 1993edition with some shortcoming , the 2000edition has the following characteristics: light weight, reasonable desigh in structure , beautiful externality, easy linkage and installation, and is extensively used in high building with high grade, the paint used in the coating part is environmentally sound , strength, corronsion-resistant , and totally meet the need of the EN877