Pipe fittings: Elbow, tee, reducer, flange etc. Till now, we have six spiral steel pipe production line, two hot rolled ERW steel pipe production line, four hot expand seamless steel pipe production line, with ??219-1820 spiral ssaw steel pipe annual capacity of 200 thousand tons, ??57-377 hot rolled ERW steel pipe 200 thousand tons, ??377-630 hot expand seamless steel pipe 60 thousand tons, acconding to the standard of GB/T8162-1999GB/T8163-1999GB3087-1999GB5310-1995ASMA5313ASTMA106BAPI5LB.