Product Overview

PPH welding flanges are necked pipe fittings made of PPH material that connect to pipelines via hot-melt welding. Specifically designed for large-diameter piping systems, they ensure high strength and sealing at the connection point.

Main Functions

First, PPH welding flanges play a crucial role in pipeline connections. Since piping systems require frequent maintenance, replacement, or expansion, the connections between pipes must be reliable and easy to operate. The design of PPH welding flanges allows for easy welding connections to pipelines, ensuring not only a strong connection but also facilitating subsequent maintenance and replacement.
Furthermore, they possess a certain pressure resistance. In piping systems, pipelines may be subjected to varying pressures due to different media and transportation conditions. They can withstand these pressures and ensure the safe operation of the piping system.
Finally, PPH welding flanges also offer corrosion resistance. In certain media environments, such as corrosive media like acids and alkalis, both pipes and flanges may be corroded. PPH welding flanges are made of materials with good corrosion resistance, providing a certain degree of resistance to media corrosion and extending the service life of the piping system.

Main connection dimensions of PPH flange//connection method:butt welding

Nominal diameter DN(mm)	Diameter OD(mm))	Nozzle thickness S(mm)	Flange thickness S1(mm)		Outer diameter of flange D1(mm)	Number of holes	Aperture F(mm)	Center hole spacing k(mm)	Nozzle height L(mm)
DN25	φ32	3.5	15		120	4-M12	14	85	60
DN32	φ40	4.5	17		140	4-M16	18	100	63
DN40	φ50	5.5	18		150	4-M16	18	110	57
DN50	φ63	5.5	22		160	4-M¹6	18	125	46
DN65	φ75	7	25		185	4-M16	18	145	60
DN80	φ90	8.5	23		200	4-M¹6	18	160	77
DN100	φ110	12.5	26		220	8-M16	18	180	59
DN100	φ125	10.5	18		220	8-M16	18	180	69
DN125	φ140	11	18		250	8-M16	18	210	67
DN150	φ160	14	18		285	8-M20	22	240	72
DN150	φ180	14	28		285	8-M20	22	240	67
DN200	φ200	18	32		340	8-M20	22	295	83
DN200	φ225	17.5	32		340	8-M20	22	295	73
DN250	φ250	20.5	32		395	8-M20	22	350	78
DN250	φ280	22.5	36		395	12-M20	22	350	74
DN300	φ315	24	42		444	12-M20	22	400	68
DN350	φ355	22	47		503	16-M20	22	460	76
DN400	φ400	21	51		561	16-M24	22	516	67
DN450	φ450	28	50		613	20-M24	24	560	65
DN500	φ500	28	50		668	20-M24	26	610	77
-	φ560	50	55		720	20-M27	26	670	25
DN600	φ630	30	57		775	20-M27	30	720	99
DN700	φ710	33	63		886	24	30	825	93
DN800	φ800	45	70		1025	24	34	945	150
DN900	φ900	90	50		1110	28	34	1040	170
DN1000	φ1000	90		50	1230	28	34	1160	200