Welded Ring Lap Joint Flange (Butt Weld Ring Loose Flange) - Custom Titanium & Alloy Steel Flanges | Factory Direct Supply

Welded Ring Lap Joint Flange (Butt Weld Ring Loose Flange) — a free-rotating loose flange combined with a butt-weld stub end. It offers flexible connection, easy installation and disassembly, 内部技能lent sealing integrity and strong corrosion resistance. Suitable for chemical, marine, oil & gas, water treatment and industrial pipeline systems. Available in Titanium Gr2/Gr5, stainless steel, carbon steel and alloy steel; manufactured to ASME B16.5, DIN, GOST, PN and Class standards. Custom sizes, OEM, bulk wholesale and fast worldwide delivery. Factory-direct supply, stable quality and competitive pricing

Nominal Size		Conncetion Dimension											Welding Neck Collar
DN	NPS	Pipe Outer Diameter	Flange Outer Diameter	Bolt Hole Circle Diameter	Bolt Hole Diameter	Bolt Size	Number of Bolts (pcs)	Flange Thickness	Flange Bore	Flange Hub Diameter (Large End)	Flange Hub Height	Fillet Radius	Weld Ring Height	Weld Ring Outer Diameter
		A	D	K	L	Th	n	C	B	N	H	R1	h	d
15	1/2	21.3	95	66.7	16	M14	4	14.3	22.9	38	22	3	51	34.9
20	3/4	26.9	115	82.6	16	M16	4	15.9	28.2	48	25	3	51	42.9
25	1	33.7	125	88.9	18	M16	4	17.5	34.9	54	27	3	51	50.8
32	1-1/4	42.4	135	98.4	18	M16	4	19.1	43.7	64	27	5	51	63.5
40	1-1/2	48.3	155	114.3	22	M20	4	20.7	50	70	30	6	51	73
50	2	60.3	165	127	18	M16	8	22.3	62.5	84	33	8	64	92.1
65	2-1/2	76.1	190	149.2	22	M20	8	25.4	78.5	100	38	8	64	104.8
80	3	88.9	210	168.3	22	M20	8	28.6	91.4	117	43	10	64	127
100	4	114.3	255	200	22	M20	8	31.8	116.8	146	48	11	76	157.2
125	5	139.7	280	235	22	M20	8	35	144.4	178	51	11	76	185.7
150	6	168.3	320	269.9	22	M20	12	36.6	171.4	206	52	13	89	215.9
200	8	219.1	380	330.2	26	M24	12	41.3	222.2	260	62	13	102	269.9
250	10	273	445	387.4	30	M27	16	47.7	277.4	321	95	13	254	323.8
300	12	323.9	520	450.8	33	M30	16	50.8	328.2	375	102	13	254	381
350	14	355.6	585	514.4	33	M30	20	54	360.2	425	111	13	305	412.8
400	16	406.4	650	571.5	36	M33	20	57.2	411.2	483	121	13	305	469.9
450	18	457	710	628.6	36	M33	24	60.4	462.3	533	130	13	305	533.4
500	20	508	775	685.8	36	M33	24	63.5	514.4	587	140	13	305	584.2
600	24	610	915	812.8	42	M39×3	24	69.9	616	702	152	13	305	692.2

Titanium flanges, with their high strength-to-weight ratio, high-temperature resistance, corrosion resistance and

excellent fatigue performance,have become core components in six high-end sectors: Aerospace,Petrochemicals,

Marine Engineering, New Energy, Electronics and Environmental Protection.