Technical assistance: Use of PPH pipes
Thread Content
This post was last edited by hesonchang214 on 2010-7-9 at 15:25. When pipes are made of PPH material, how should valves be chosen? And how should pipes and valves be connected?
PPH is high-performance polypropylene. Plastic valves or valves made of other materials can be used, and flanges can be employed to connect the pipes to the valves.
This post was last edited by hesonchang214 on 2010-7-9 15:26; the hot-melting method is used. I remember there were many manufacturers on that side in Yangzhong!
PP-H is homopolymerized polypropylene, while PP-R is randomly polymerized polypropylene. Its pipe connections are made using heat fusion welding methods, including socket welding, butt welding, and infrared welding. For pipes made of PP-H, it is advisable to choose PP-H valves as well. For ball valves of small diameter, they can be directly welded to the pipe (their connections are socket-type or butt-weld type). In the case of valves with flange connections, a PP-H flange must first be welded to the pipe, after which the valve is attached to the pipe via that flange
This post was last edited by hesonchang214 on 2010-7-9 at 15:26. Reply to 4# zengheng: Our company has always used stainless steel valves; we have never used PPH valves, so I’m a bit worried!
Reply to 5# luoyangluoyan: Is PP-H used for the pipes, and stainless steel for the valves? What is your medium? What are the temperature and pressure? If PP-H can handle it, why use stainless steel? We have used PP-H pipe valves on many occasions.
Reply to 6# zengheng: The medium is solutions of sulfurous acid AN and sulfuric acid AN, the temperature is around 60-70 degrees, and the pressure does not exceed 0.1 Mpa.
Reply to 7# luoyangluoyan: If PP-H pipes can be used, then PP-H valves can certainly also be used!