1) Engineering Standard "Code for Construction Quality Acceptance of Water Supply, Drainage and Heating Engineering" GB50242-2002 "Code for Acceptance of Construction Quality of Ventilation and Air Conditioning Engineering" GB 50243-2002 2), Product Standard "Common Valve Flange and Butt Weld Steel Ball Valves "GB / T12237-89" Iron and Steel Ball Valves "GB / T 15185-1994" Steel Valves General Requirements "GB / T 12224-2005" drinking water distribution equipment and protective materials safety evaluation criteria "GB / T17219-1998 Standard ID Number Chinese Name Standard English name sy / t5835-93 Wellhead valve fracturing gb / t12237-1989 General valve flange and butt welded steel ball valve general purpose industrial valves - flanged and butt- Welded endsteel ball valves gb / t15185-1994 iron and copper ball valves cast iron and copper alloy ball valves jb / t7745-1995 pipeline ball valve jb / t53167-1999 ball valve product quality classification jc / t783-2004 glass fiber reinforced phenolic Plastic ball valve jb / t8861-2004 ball valve static pressure life test procedures nf e29-350-2003 industrial valves. Steel ball valves, globe valves and check valves (industrial valves - globe and globe Industrial valves - Rotating valves - Brass ball valves - Specification. industrial valves - Brake ball valves - Cast iron globe valves.) nf e29-465-1986 Industrial valves. Rotary valves. Copper-aluminum ball valves. Specification Building valves - manually operated copper alloy and stainless steel ball valves for potable water supply in buildings - tests andrequirements.) Nf e29-335-2003 Petroleum and natural gas industries Size dn 100 and smaller steel gate valves, ball valves and check valves (steel gate, globe and check valves for sizes dn 100 and sler, for the petroleum and natural gas industries.) nf e29-139-1998 Building gas installations Manual operation Manually operated ball valves and closed bottom taper plugvalves for gas installations for buildings ) ansi / asse 1002-1979 metal closures flushing ball valve cocks ansi / api 608-2002 butt welds metal ball valves - flanged and butt - welding ends bs en 13709- Industrial valves - Globe and globe stop and checkvalves bs en 13789-2003 industrial valves - industrial valves - cast iron globe valves bs en iso 15761-2003 oil and gas industry with a size of dn 100 and smaller steel gate valve, ball valve and check valve