HONGWUGAS™ is a corrugated stainless steel pliable tubing complying with EN15266 “Stainless steel pliable corrugated tubing kits in buildings for gas”. Manufacturing materials are: EN1.4404 type 316L corrugated stainless steel tubing with a minimum wall thickness of .3mm, jacketing of UV resistant polyethylene meeting the requirements of EN13501 for flame spread and smoke density. All mechanical tube fittings are DZR brass with our unique designed fittings. HONGWUGAS™ CSSPT (Corrugated Stainless Steel Pliable Tubing) is used for natural gas and propane installations. HONGWUGAS™ CSSPT is currently in use for gas piping systems in single and multi-family residential as well as commercial and industrial buildings. The HONGWUGAS system is approved by DVGW under DIN EN15266:2007 with registration number CG-4602CS0403 .