Aqua Trading Company Luoyang tells you: Fittings graphics current national standard GB / T 6567.5-2008 Graphical symbols Technical drawings pipeline piping systems, fittings and valves symbol isometric drawing method GB / T 11618.1-2008 copper pipe fittings - Part 1: brazed tube GB / T 12772-2008 flexible interface with cast iron drainage pipes, fittings and accessories GB / T 3420-2008 gray cast iron pipe fittings Luoyang Aqua Trading Company tells you: Fittings existing national standards cement mortar lining GB / T 24596-2009 ductile iron pipes and fittings polyurethane coating GB / T 24672-2009 sprinkler metal thin-walled tube and pipe fittings GB / T 17457-2009 ductile iron pipes and fittings GB / T 5135.19-2010 automatic sprinkler systems - Part 19: Plastic pipes and pipe fittings GB / T 26002-2010 gas transport stainless steel corrugated hose and fittings threaded fittings fire tube, pipe fittings, water rhyme Traders factory outlets provided by the Luoyang Aqua Trading Company. Luoyang Aqua Trading Company (www.lyhpgj.com) (www.lyhpgj.com) strong, credible, in Luoyang, Henan Province plumbing hardware industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Aqua-commerce into the brilliant and you work for a better future!