Three-way butt welding (SBY-IV) and Non-diameter three-way butt welding (SBY-IVD)

The company's products cover petrochemical, oil refining, and offshore oil companies affiliated to Sinopec Group Corporation, China National Petroleum Corporation, and China National Offshore Oil Corporation. It has a large number of customers in steel, food, medicine, environmental protection, electric power, coal chemical and other industries.

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The connection types of three-way butt welding (SBY IV) and Non-diameter three-way butt welding (SBY IVD) are shown in Figs. 17 and 18 and Table 9 (DN50-400, PN < 10.0 MPa).

Table 9 of SBY IV and SBY IV D

SBYⅣ type	SBYⅣD type		L1	SBYⅣ type SBYⅣD type
				PN1.6	PN2.5	PN4.0	PN2.0	PN5.0	PN10.0	N
DN	DN1×DN2	L2		L
50	50×40	60	64	198	198	198	214	222	226	R3/8
65	65×50	70	76	222	226	226	245	254	260
80	80×50	76	86	244	261	263	268	282	289
	80×65	83
100	100×65	95	105	284	304	314	312	330	352
	100×80	98
150	150×100	130	143	367	392	394	402	423	453	R3/4
	150×125	137
200	200×100	156	178	444	469	487	489	510	546
	200×150	168
250	250×150	194	216	530	550	579	566	599	649	M20x1.5
	250×200	208
	300×200	229	254	614	632	670	656	691	732
	300×250	241
	350×250	257	279	672	695	730	722	757	795
	350×300	270
	400×200	273	305	730	764	808	776	815	866
	400×250	283
	400×300	295
	400×350	305