Pipeline partial embrittlement has two main areas, namely the heat-affected zone CGHAZ embrittlement is due to over-grown grains overheated zone and the formation of undesirable tissue caused by the multi-layer welding CGHAZ critical embrittlement again that coarse grain zone again before the weld bead is heated by a subsequent two-phase region caused. This can be done by adding a certain amount in the steel Ti, Nb micro-alloying elements and control the cooling rate to obtain a suitable weld t8 / 5 to improve toughness. West-East Gas Pipeline Project with steel pipes, steel pipes for the West-East Gas Pipeline Project, Texas X70 grade pipeline steel production fiberglass duct, specifications for Φ1 016mm × 14.6 ~ 26.2mm, which accounted for about 80% of spiral welded pipe, LSAW about 20% of pipe, pipeline steel with about 1.7 million tons. Henderson, Texas conditioning plant FRP winding pipe is a lightweight, high-strength, corrosion-resistant non-metallic pipes. It is a resin-based weight fiberglass layer by layer according to process requirements wound on a rotating mandrel quality FRP duct and distance covered with quartz sand as evenly sand layer between the fibers. Its wall structure reasonably advanced FRP duct, give full play to the role of the material, to meet the intensity of use of the former title, improved rigidity, to ensure the stability and reliability of the product. GRP its excellent chemical resistance, lightweight, high strength fiberglass duct Which is good quality, no scaling, shock resistance, and long service life of ordinary steel, and lower total cost, quick installation, safe and reliable, been accepted by the majority of users. Dezhou, Shandong Hongxin air-conditioning plant Hongxin air-conditioning equipment, [Texas] production FRP duct, FRP duct is provided by Horizon Air conditioning equipment. Looking for "new air unit fresh air ventilator fan air pressure delivery outlet damper chassis outlet. .. ..." Reliable supplier network operators choose to have the whole alliance certification: Texas Horizon Air Conditioning Equipment Co., Ltd. (www.hxktsb . com), trustworthiness and reliability, "Business League call" on the page now click on live chat with us now!