... tube2) Norminal Diameter: 15, 16, 19, 22, 28, 35, 42, 54mm3) According to Europe EN1057 and ASTM B88M ... Copper pipeline:1) Healthy and non-toxic, bacteriological neutral, conforming to drinking waterstandards2) Resistant to high temperatures (110°), good ... For subterranean natural gas, coal gas and oxygen Pictures of Product Pictures of CompanyPictures of Certification Insulated Copper Tube, For ...