Solicitações De Construção E Edificação / Turquia

piping materials, such as ASTM A106 Gr B, polyethylene, and ASTM A234 WPB if you can please direct me to the companies so i can send them the inquiries piping materials, such as ASTM A106 Gr B, polyethylene, and ASTM A234 WPB could you direct me to companies that manufacture these materials it doesnt have to be specific the description i provided above but regarding the piping materials