TwinPipes are produced after one of the following two methods:
1. Traditional process
2. Axial conti process
As one of the leading preinsulated pipes enterprises in China, we warmly welcome you to wholesale bulk preinsulated pipes from our factory. All 17Mn4, 14MoV63, X10CrMoVNb9-1, ASTM A182 F91, 15 Mo3, 13CrMo44, 19Mn5, SA 213 T91, SA 213 T92, A334 grade 7 pipes are with high quality and competitive price.