Product Name: HDPE Gas Pipes and Water-Supply Standard: BS4514; BS5255; GB/T5836; ISO 4435; GB/T10002. 3; ISO3633 Outside Diameter: From 20mm to 500mm Wall Thickness as per ISO standard. PE pipes and fittings: HDPE and LDPE. PE gas pipes and PE fresh water pipes. PE gas fittings and PE steel gas fittings. PE gas electro-fusion fittings. PE fresh water fitting. Properties: Light, erosion-resistant, easy and fast installation, high stability, the only and Best choice for gas pipes and modification of city gas piping system. Installation: Butt-fusion and electro-fusion welding are the main methods used for connecting gas pipes and fittings. It is safe, reliable and has no leakage. Standard: DIN, GB Unit Price/Payment: T/T,L/C