Product Overview

PP hot melt elbows are common pipe fittings primarily used to change the direction of piping systems. Made of polypropylene (PP), they connect to other pipes or fittings via hot-melt welding, forming a well-sealed and high-strength piping system. These elbows are widely used in water supply and drainage, chemical, and agricultural irrigation fields.

Product Features

They are made of polypropylene, a material known for its corrosion resistance, acid and alkali resistance, and lightweight. Because PP is non-conductive and does not react with most chemicals, it is suitable for transporting various liquids and gases. The hot-melt welding method ensures a seamless connection, reducing the risk of leakage.
Elbow angles are typically available in 45-degree and 90-degree angles, allowing selection based on specific needs. The smooth inner wall of the PP hot-melt elbow minimizes fluid resistance, reduces sediment buildup, and maintains high flow efficiency even after long-term use.

Production Process

The production of PP hot-melt elbows mainly involves two steps: injection molding and subsequent processing. Polypropylene granules are heated and melted, then injected into a mold, and cooled to form the basic shape of the elbow. Next, the ends of the elbow are machined to ensure flatness and dimensional accuracy, so that they can fit tightly with other pipe fittings during hot-melt welding.
Quality control is crucial during production. A qualified elbow should be free of bubbles and cracks, with flat ends and uniform wall thickness. Inferior products may experience weak welds or poor sealing during welding, affecting their performance.

PP45°elbow main connection size//connection method:hot melt socket

Nominal diameter DN(mm)	Diameter OD(mm)	Thickness S(mm)	External diameter D(mm)	Internal diameter Z(mm)	Height L(mm)	Hot melt width J(mm)
DN15	φ20	5.5	30	19	60	18
DN20	φ25	4	32	24	55	18.5
DN25	φ32	4.5	39	30	63	20
DN32	φ40	5	49	39	73	22
DN40	φ50	6	61	49	82	25
DN50	φ63	7	75	61	128	40
DN65	φ75	8.5	90	75	138	40
DN80	φ90	10.5	108	87	156	40
DN100	φ110	12	130	107	183	45

PP90°elbow main connection size//connection method:hot melt socket

Nominal diameter DN(mm)	Diameter OD(mm)	Thickness S(mm)	External diameter D(mm)	Internal diameter Z(mm)	Height L(mm)	Hot melt width J(mm)
DN15	φ20	3.5	26	19	41	17
DN20	φ25	3.9	32	24.2	47	18
DN25	φ32	3.5		31	61	33
DN32	φ40	5	48	38	71	25
DN40	φ50	7	63	48	84	25
DN50	φ63	8	77	61	104	30
DN65	φ75	9.5	91	72	123	40
DN80	φ90	10	106	86	141	40
DN100	φ110	11.5	130	107	168	40

PP90°elbow main connection size//connection method:ordinary socket

Nominal diameter DN(mm)	Diameter OD(mm)	Thickness S(mm)	External diameter D(mm)	Internal diameter Z(mm)	Height L(mm)	Socket width J(mm)
DN25	φ32	3.5	40	32	68	35
DN32	φ40	4	50	42	80	30
DN40	φ50	5.5	63	52	82	25
DN50	φ63	6.5	77	64	105	30
DN65	φ75	7.5	92	77	125	35
DN80	φ90	7	106	92	143	45
DN100	φ110	9.5	130	111	170	40
DN100	φ125	10	145	126	200	50
DN125	φ140	9	158	141	225	51
DN150	φ160	10	180	161	246	52
DN150	φ180	11	203	181	281	72
DN200	φ200	11	225	203	302	72
	φ218	11.5	242	219	326	72
	φ218Molding	15	250	220	370	65
	φ225	12	250	226	330	73
DN250	φ250	9	270	252	350	69
	φ250Molding	14	285	253	405	60
	φ280	13	309	283	388	76
	φ280Molding	15	315	283	515	60
DN300	φ315	10	340	320	410	74
DN300	φ315Molding	15	345	316	495	60
DN350	φ355	10	381	362	442	68
DN350	φ355Molding	20	390	356	540	70
DN400	φ400	10	423	403	494	75
DN400	φ400Molding	16	438	402	600	60
DN450	φ450Molding	19	485	451	670	80
DN500	φ500	12	527	505	622	95
	φ500Thick	18	540	508	745	96
	φ500Molding	19	540	503	740	100
	φ560Molding	18	585	560	720	90
DN600	φ630	14	660	635	750	100
DN600	φ630Molding	22	682	638	850	98
DN700	φ710Molding	18	754	717	854	90
DN800	φ800Molding	20	854	810	978	82
DN900	φ900Molding	20	950	902	1060	70

PP90°elbow main connection size //connection method:butt welding

Nominal diameter DN(mm)	Diameter OD(mm)	Thickness S(mm)	External diameter D(mm)	Internal diameter Z(mm)	Height L(mm)
DN20	φ25	4	25	18	48
DN25	φ32	3	32	26	60
DN32	φ40	4	40	32	65
DN40	φ50	5	50	40	80
DN50	φ63	6	63	51	103
DN65	φ75	9	75	57	116
DN80	φ90	10	90	70	135
DN100	φ110	11	110	88	162
DN100	φ125	10	125	105	195
DN125	φ140	11	140	117	220
DN150	φ160	12	160	134	243
DN150	φ180	14	180	150	273
DN200	φ200	17	200	165	300
DN200	φ225	18.7	225	187	344
DN250	φ250	20	250	210	415
DN250	φ280	25	280	225	425
DN300	φ315	25	315	260	450
DN350	φ355	23	355	305	505
DN400	φ400	28	400	344	535
DN450	φ450	25	450	400	600
DN500	φ500	27	500	445	665
--	φ560	30	560	502	700
DN600	φ630	30	630	560	810
DN700	φ710	30	710	640	910
DN800	φ800	25	800	750	1020
DN900	φ900	47	900	806	1023
DN1000	φ1000	22	1000	956	1169

Nominal diameter DN(mm)	Diameter OD(mm)	Thickness S(mm)	External diameter D(mm)	Internal diameter Z(mm)	Height L(mm)
DN100	φ100 Right-angle bend	12	110	85	180
DN125	φ140 Right-angle bend	12	140	115	217
DM150	φ160 Right-angle bend	15	160	131	234
DN200	φ225 Right-angle bend	20	224	184	339
DN250	φ280 Right-angle bend	25	280	230	392
DN300	φ315 Right-angle bend	30	315	255	423