HDPE Electro Fusion Stub End (Flange Adapter)

HDPE Electro Fusion Stub End, PN10 / PN16, PE100, to ISO 4427 / EN 12201, for PE water and gas networks.

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Category: HDPE Electro Fusion Fittings

HDPE Electro Fusion Fittings

Product Overview

The HDPE electro fusion stub end terminates a PE100 pipeline with a flanged connection. One end is fused to the pipe through an electro fusion socket, while the plain stub face is ready for a backing ring and gasket so the HDPE line can be bolted to pumps, valves or steel pipework. Available from DN 50 to DN 315 mm with PN10 to PN16 ratings, the HDPE electro fusion stub end is the standard choice for pump rooms and valve chambers where a buried HDPE main has to meet metallic equipment.

Quick Information

Material: PE100 (HDPE)
Joint: Electro fusion to pipe, flanged face to equipment
Ring: Loose backing ring
Pressure rating: PN10 / PN16
Standard: ISO 4427 / EN 12201
Colour: Black

Specification Table


Specification	Φdn	L	A	Φd	PN16	PN10	PN20	PN25
50	50	78	71	4.7/4.0	√
63	63	77	71	4.7/4.0	√
75	75	77	70	4.7/4.0	√
90	90	85	77	4.7/4.0	√
110	110	104	95	4.7/4.0	√
125	125	105	95	4.7/4.0	√
140	140	107	94	4.7/4.0	√
160	160	125	113	4.7/4.0	√
200	200	123	110	4.7/4.0	√
225 (8 holes)	225	122	109	4.7/4.0	√
225 (12 holes)	225	122	109	4.7/4.0	√
250	250	150	140	4.7/4.0	√
280	280	150	145	4.7/4.0	√
315	315	155	145	4.7/4.0	√
355	355	155	135	4.7/4.0	√
400	400	155	133	4.7/4.0	√
450	450	155	140	4.7/4.0	√
500	500	190	170	4.7/4.0	√
560	560	205	180	4.7/4.0	√
630	630	205	190	4.7/4.0	√
Flange 355	355	150	132	4.7/4.0		√
Flange 400	400	150	135	4.7/4.0		√
Flange 500	500	190	170	4.7/4.0		√
Flange 560	560	205	180	4.7/4.0		√
Flange 630	630	205	190	4.7/4.0		√
Flange 710	710	270	245	4.7/4.0		√
Flange 800	800	273	250	4.7/4.0		√
Flange 900	900	300	285	4.7/4.0		√
Flange 1000	1000	342	325	4.7/4.0		√
110	110	105	95	4.7/4.0			√
160	160	125	112	4.7/4.0			√
200	200	125	105	4.7/4.0			√
250	250	150	137	4.7/4.0			√
315 (12 holes)	315	173	160	4.7/4.0			√
315 (16 holes)	315	173	160	4.7/4.0			√
Flange 50	50	75	29	4.7/4.0				√
Flange 63	63	76	32	4.7/4.0				√
Flange 75	75	82.5	37	4.7/4.0				√
Flange 90	90	83.5	40	4.7/4.0				√
Flange 110	110	110	71	4.7/4.0				√
Flange 160	160	114.5	80	4.7/4.0				√
Flange 200	200	120	67	4.7/4.0				√
Flange 250	250	150	133	4.7/4.0				√

Key Features

Machined Stub Face: The plain face is machined after moulding to stay square to the pipe axis, so gasket compression is even and the flanged joint seals first time.
Electro Fusion Socket: The PE side of the stub end uses a fused joint, so the connection to the buried main is permanent and leak tight.
Backing Ring Matched: The stub face is dimensioned to standard backing rings, so the HDPE electro fusion stub end bolts straight to steel or ductile iron flanges.
No Metal in Water Path: The electro fusion stub end keeps polyethylene in the water path, so there is no corrosion or galvanic risk at the transition point.
Dismountable Flange: The flanged joint can be opened for maintenance, so the HDPE electro fusion stub end is used where access matters.
Full PE100 Flexibility: After fusion the line stays flexible, so the buried HDPE main can absorb settlement without stressing the flanged connection.

Production

Raw Material

The HDPE electro fusion stub end is moulded from virgin PE100 compound rated MRS 10.0 per ISO 4427-3, with the resin lot recorded for full traceability from pellet to fitting.

Molding Process

Each electro fusion stub end is injection moulded in one shot with the resistance coil pre positioned in the socket wall; the plain stub face is machined after moulding so the sealing surface stays flat and parallel to the flange, and the backing ring register is held to the mating flange standard.

Quality Control

Every batch of HDPE electro fusion stub ends is gauged for socket diameter, ovality, coil resistance, stub face flatness and backing ring register, then sample welded and pressure tested to 1.5 times rated pressure before release; each fitting carries a batch code traceable to the raw resin lot.

Applications

Pump suction and discharge connections use the HDPE electro fusion stub end to bolt a buried HDPE main to a centrifugal pump without a separate flange adapter.
Connection to steel or ductile iron mains relies on the electro fusion stub end, because the flanged joint can be opened for line pigging or valve replacement.
Filter and strainer inlets choose the HDPE electro fusion stub end, because the plain face mates with standard backing rings and the PE100 body resists corrosion.
Valve chamber isolation points install the electro fusion stub end, where the flanged joint gives maintenance access to the buried HDPE main.