Lap Joint Flange

Teshi Fittings, a premier manufacturer of pipe fittings, offers high-quality Lap Joint Flanges designed for various industries including Petroleum, Chemical, Hydraulic, Food, and more. Crafted with meticulous precision and adherence to international quality standards, our Lap Joint Flanges provide versatile and reliable solutions for piping systems requiring easy alignment and assembly. With a commitment to excellence and customer satisfaction, Teshi Fittings delivers superior performance and durability in every flange, offering tailored solutions to meet specific project requirements. Experience the difference with Teshi Fittings’ Lap Joint Flanges and trust in our expertise for all your piping needs.

Enquire Now

Specification
Material & Grades
Dimensions

Standard Specification of Lap Joint Flange

Dimensions	ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Size	1/2″ (15 NB) to 48″ (1200NB)
Flange Face Types / Connection Type	Flat Face Flange (FF), Raised Face Flange (RF), Ring Joint Flange (RTJ), Lap Joint Flange, Male and Female Flange (M&F), Large and Small Tongue-and-Groove Flange (T&G)
DIN	DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
BS	BS4504, BS4504, BS1560, BS10
Class	150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
Standard	ANSI B16.5, ANSI B16.47, ANSI B16.36, ANSI B16.48, BS 4504, EN1092, UNI 2277/2278, DIN, JIS, SABS1123, GOST-12820

Material & Grades of Lap Joint Flange

Stainless Steel	ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L
Duplex & Super Duplex Steel	S31803 / S32205 A182:- Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61/S32750 / S32760 A182:- Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Carbon Steel	ASTM/ASME A/SA105 A/SA105N and A/SA216-WCB, DIN 1.0460, DIN 1.0402, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, CS High Yield ASTM A694 / A694 (F52, F56, F60, F65, F70, F80)
Low Temperature Carbon Steel	ASTM A350 LF2, LF3, LF6
Alloy Steel	ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
Nickel Alloy	: Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Grade I & II)

Dimension of Lap Joint Flange

LAP JOINT FLANGE CLASS 150 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	Machine Bolt Length	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	90	30	16	22.9	60.3	11.2	3	4	1/2	50	55	5/8	M14	0.8
3/4	20	100	38	16	28.2	69.9	12.7	3	4	1/2	50	65	5/8	M14	0.9
1	25	110	49	17	34.9	79.4	14.3	3	4	1/2	55	65	5/8	M14	0.9
1 1/4	32	115	59	21	43.7	88.9	15.9	5	4	1/2	55	70	5/8	M14	1.4
1 1/2	40	125	65	22	50	98.4	17.5	6	4	1/2	65	70	5/8	M14	1.4
2	50	150	78	25	62.5	120.7	19.1	8	4	5/8	70	85	3/4	M16	2.3
2 1/2	65	180	90	29	75.4	139.7	22.3	8	4	5/8	75	90	3/4	M16	3.2
3	80	190	108	30	91.4	152.4	23.9	10	4	5/8	75	90	3/4	M16	3.7
3 1/2	90	215	122	32	104.1	177.8	23.9	11	8	5/8	75	90	3/4	M16	5
4	100	230	135	33	116.8	190.5	23.9	11	8	5/8	75	90	3/4	M16	5.9
5	125	255	164	36	144.4	215.9	23.9	11	8	3/4	85	95	7/8	M20	6.8
6	150	280	192	40	171.4	241.3	25.4	13	8	3/4	85	100	7/8	M20	8.6
8	200	345	246	44	222.2	298.5	28.6	13	8	3/4	90	110	7/8	M20	13.7
10	250	405	305	49	277.4	362	30.2	13	12	7/8	100	115	1	M24	19.5
12	300	485	365	56	328.2	431.8	31.8	13	12	7/8	100	120	1	M24	29
14	350	535	400	79	360.2	476.3	35	13	12	1	115	135	1 1/8	M27	41
16	400	595	457	87	411.2	539.8	36.6	13	16	1	115	135	1 1/8	M27	54
18	450	635	505	97	462.3	577.9	39.7	13	16	1 1/8	125	145	1 1/4	M30	59
20	500	700	559	103	514.4	635	42.9	13	20	1 1/8	140	160	1 1/4	M30	75
24	600	815	663	111	616	749.3	47.9	13	20	1 1/4	150	170	1 3/8	M33	100

LAP JOINT FLANGE CLASS 300 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	Machine Bolt Length	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	95	38	22	22.9	66.7	14.3	3	4	1/2	55	65	5/8	M14	1.2
3/4	20	115	48	25	28.2	82.6	15.9	3	4	5/8	65	75	3/4	M16	1.4
1	25	125	54	27	34.9	88.9	17.5	3	4	5/8	65	75	3/4	M16	1.4
1 1/4	32	135	64	27	43.7	98.4	19.1	5	4	5/8	70	85	3/4	M16	1.8
1 1/2	40	155	70	30	50	114.3	20.7	6	4	3/4	75	90	7/8	M20	2.7
2	50	165	84	33	62.5	127	22.3	8	8	5/8	75	90	3/4	M16	3.2
2 1/2	65	190	100	38	75.4	149.2	25.4	8	8	3/4	85	100	7/8	M20	4.6
3	80	210	117	43	91.4	168.3	28.6	10	8	3/4	90	110	7/8	M20	5.9
3 1/2	90	230	133	44	104.1	184.2	30.2	11	8	3/4	95	110	7/8	M20	7.7
4	100	255	146	48	116.8	200	31.8	11	8	3/4	95	115	7/8	M20	10
5	125	280	178	51	144.4	235	35	11	8	3/4	110	120	7/8	M20	12.7
6	150	320	206	52	171.4	269.9	36.6	13	12	3/4	110	120	7/8	M20	17.7
8	200	380	260	62	222.2	330.2	41.3	13	12	7/8	120	140	1	M24	26
10	250	445	321	95	277.4	387.4	47.7	13	16	1	140	160	1 1/8	M27	36
12	300	520	375	102	328.2	450.8	50.8	13	16	1 1/8	145	170	1 1/4	M30	52
14	350	585	425	111	360.2	514.4	54	13	20	1 1/8	160	180	1 1/4	M30	75
16	400	650	483	121	411.2	571.5	57.2	13	20	1 1/4	165	190	1 3/8	M33	86
18	450	710	533	130	462.3	628.6	60.4	13	24	1 1/4	170	195	1 3/8	M33	113
20	500	775	587	140	514.4	685.8	63.5	13	24	1 1/4	185	205	1 3/8	M33	143
24	600	915	702	153	616	812.8	69.9	13	24	1 1/2	205	230	1 5/8	M39	216

LAP JOINT FLANGE CLASS 400 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	95	38	22	22.9	66.7	14.3	3	4	1/2	75	5/8	M14	1.3
3/4	20	115	48	25	28.2	82.6	15.9	3	4	5/8	90	3/4	M16	1.5
1	25	125	54	27	34.9	88.9	17.5	3	4	5/8	90	3/4	M16	1.8
1 1/4	32	135	64	29	43.7	98.4	20.7	5	4	5/8	95	3/4	M16	2.3
1 1/2	40	155	70	32	50	114.3	22.3	6	4	3/4	110	7/8	M20	3.2
2	50	165	84	37	62.5	127	25.4	8	8	5/8	110	3/4	M16	4.1
2 1/2	65	190	100	41	75.4	149.2	28.6	8	8	3/4	120	7/8	M20	5.9
3	80	210	117	46	91.4	168.3	31.8	10	8	3/4	125	7/8	M20	7.3
3 1/2	90	230	133	49	104.1	184.2	35	10	8	7/8	140	1	M24	9.6
4	100	255	146	51	116.8	200	35	11	8	7/8	140	1	M24	11.8
5	125	280	178	54	144.5	235	38.1	11	8	7/8	145	1	M24	14.1
6	150	320	206	57	171.4	269.9	41.3	13	12	7/8	150	1	M24	20
8	200	380	260	68	222.2	330	47.7	13	12	1	170	1 1/8	M27	31
10	250	445	321	102	277.4	387.4	54	13	16	1 1/8	190	1 1/4	M30	42
12	300	520	375	108	328.2	450.8	57.2	13	16	1 1/4	205	1 3/8	M33	59
14	350	585	425	117	360.2	514.4	60.4	13	20	1 1/4	210	1 3/8	M33	82
16	400	650	483	127	411.2	571.5	63.5	13	20	1 3/8	220	1 1/2	M36	107
18	450	710	533	137	462.3	628.6	66.7	13	24	1 3/8	230	1 1/2	M36	130
20	500	775	587	146	514.4	685.8	69.9	13	24	1 1/2	240	1 3/4	M39	157
24	600	915	702	159	616	812.8	76.2	13	24	1 3/4	265	1 7/8	M45	232

LAP JOINT FLANGE CLASS 600 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	95	38	22	22.9	66.7	14.3	3	4	1/2	75	5/8	M14	1.3
3/4	20	115	48	25	28.2	82.6	15.9	3	4	5/8	90	3/4	M16	1.4
1	25	125	54	27	34.9	88.9	17.5	3	4	5/8	90	3/4	M16	1.8
1 1/4	32	135	64	29	43.7	98.4	20.7	5	4	5/8	95	3/4	M16	2.3
1 1/2	40	155	70	32	50	114.3	22.3	6	4	3/4	110	7/8	M20	3.2
2	50	165	84	37	62.5	127	25.4	8	8	5/8	110	3/4	M16	4.1
2 1/2	65	190	100	41	75.4	149.2	28.6	8	8	3/4	120	7/8	M20	5.9
3	80	210	117	46	91.4	168.3	31.8	10	8	3/4	125	7/8	M20	7.3
3 1/2	90	230	133	49	104.1	184.2	35	11	8	7/8	140	1	M24	9.6
4	100	275	152	54	116.8	215.9	38.1	11	8	7/8	145	1	M24	16.8
5	125	330	189	60	144.4	266.7	44.5	11	8	1	165	1 1/8	M27	29
6	150	355	222	67	171.4	292.1	47.7	13	12	1	170	1 1/8	M27	36
8	200	420	273	76	222.2	349.2	55.6	13	12	1 1/8	190	1 1/4	M30	52
10	250	510	343	111	277.4	431.8	63.5	13	16	1 1/4	215	1 3/8	M33	77
12	300	560	400	117	328.2	489	66.7	13	20	1 1/4	220	1 3/8	M33	91
14	350	605	432	127	360.2	527	69.9	13	20	1 3/8	235	1 1/2	M36	105
16	400	685	495	140	411.2	603.2	76.2	13	20	1 1/2	255	1 5/8	M39	150
18	450	745	546	152	462.3	654	82.6	13	20	1 5/8	275	1 3/4	M42	182
20	500	815	610	165	514.4	723.9	88.9	13	24	1 5/8	285	1 3/4	M42	232
24	600	940	718	184	616	838.2	101.6	13	24	1 7/8	330	2	M48	332

LAP JOINT FLANGE CLASS 900 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	120	38	32	22.9	82.6	22.3	3	4	3/4	110	7/8	M20	1.8
3/4	20	130	44	35	28.2	88.9	25.4	3	4	3/4	115	7/8	M20	2.3
1	25	150	52	41	34.9	101.6	28.6	3	4	7/8	125	1	M24	3.6
1 1/4	32	160	64	41	43.7	111.1	28.6	5	4	7/8	125	1	M24	4.1
1 1/2	40	180	70	44	50	123.8	31.8	6	4	1	140	1 1/8	M27	5.5
2	50	215	105	57	62.5	165.1	38.1	8	8	7/8	145	1	M24	11.5
2 1/2	65	245	124	64	75.4	190.5	41.3	8	8	1	160	1 1/8	M27	16.5
3	80	240	127	54	91.4	190.5	38.1	10	8	7/8	145	1	M24	12
4	100	290	159	70	116.8	235	44.5	11	8	1 1/8	170	1 1/4	M30	24
5	125	350	190	79	144.4	279.4	50.8	11	8	1 1/4	190	1 3/8	M33	38
6	150	380	235	86	171.4	317.5	55.6	13	12	1 1/8	190	1 1/4	M30	50
8	200	470	298	114	222.2	393.7	63.5	13	12	1 3/8	220	1 1/2	M36	78
10	250	545	368	127	277.4	469.9	69.9	13	16	1 3/8	235	1 1/2	M36	112
12	300	610	419	143	328.2	533.4	79.4	13	20	1 3/8	255	1 1/2	M36	148
14	350	640	451	156	360.2	558.8	85.8	13	20	1 1/2	275	1 5/8	M39	182
16	400	705	508	165	411.2	616	88.9	13	20	1 5/8	285	1 3/4	M42	193
18	450	785	565	190	462.3	685.8	101.6	13	20	1 7/8	325	2	M48	258
20	500	855	622	210	514.4	749.3	108	13	20	2	350	2 1/8	M52	317
24	600	1040	749	267	616	901.7	139.7	13	20	2 1/2	440	2 5/8	M64	608

LAP JOINT FLANGE CLASS 1500 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	120	38	32	22.9	82.6	22.3	3	4	3/4	110	7/8	M20	1.8
3/4	20	130	44	35	28.2	88.9	25.4	3	4	3/4	115	7/8	M20	2.3
1	25	150	52	41	34.9	101.6	28.6	3	4	7/8	125	1	M24	3.7
1 1/4	32	160	64	41	43.7	111.1	28.6	5	4	7/8	125	1	M24	4.1
1 1/2	40	180	70	44	50	123.8	31.8	6	4	1	140	1 1/8	M27	5.5
2	50	215	105	57	62.5	165.1	38.1	8	8	7/8	145	1	M24	9.8
2 1/2	65	245	124	64	75.4	190.5	41.3	8	8	1	160	1 1/8	M27	16.4
3	80	265	133	73	91.4	203.2	47.7	10	8	1 1/8	180	1 1/4	M30	21.8
4	100	310	162	90	116.8	241.3	54	11	8	1 1/4	195	1 3/8	M33	33
5	125	375	197	105	144.4	292.1	73.1	11	8	1 1/2	250	1 5/8	M39	59
6	150	395	229	119	171.4	317.5	82.6	13	12	1 3/8	260	1 1/2	M36	75
8	200	485	292	143	222.2	393.7	92.1	13	12	1 5/8	290	1 3/4	M42	118
10	250	585	368	178	277.4	482.6	108	13	12	1 7/8	335	2	M48	198
12	300	675	451	219	328.2	571.5	123.9	13	16	2	375	2 1/8	M52	264
14	350	750	495	241	360.2	635	133.4	13	16	2 1/4	405	2 3/8	M56	341
16	400	825	552	260	411.2	704.8	146.1	13	16	2 1/2	445	2 5/8	M64	454
18	450	915	597	276	462.3	774.7	162	13	16	2 3/4	495	2 7/8	M72	590
20	500	985	641	292	514.4	831.8	177.8	13	16	3	540	3 1/8	M76	792
24	600	1170	762	330	616	990.6	203.2	13	16	3 1/2	615	3 5/8	M90	1248

LAP JOINT FLANGE CLASS 2500 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	135	43	40	22.9	88.9	30.2	3	4	3/4	120	7/8	M20	3.2
3/4	20	140	51	43	28.2	95.2	31.8	3	4	3/4	125	7/8	M20	3.7
1	25	160	57	48	34.9	108	35	3	4	7/8	140	1	M24	5
1 1/4	32	185	73	52	43.7	130.2	38.1	5	4	1	150	1 1/8	M27	7.5
1 1/2	40	205	79	60	50	146	44.5	6	4	1 1/8	170	1 1/4	M30	10
2	50	235	95	70	62.5	171.4	50.9	8	8	1	180	1 1/8	M27	17.5
2 1/2	65	265	114	79	75.4	196.8	57.2	8	8	1 1/8	195	1 1/4	M30	23
3	80	305	133	92	91.4	228.6	66.7	10	8	1 1/4	220	1 3/8	M33	37.8
4	100	355	165	108	116.8	273	76.2	11	8	1 1/2	255	1 5/8	M39	57
5	125	420	203	130	144.4	323.8	92.1	11	8	1 3/4	300	1 7/8	M45	95
6	150	485	235	152	171.4	368.3	108	13	8	2	345	2 1/8	M52	148
8	200	550	305	178	222.2	438.2	127	13	12	2	380	2 1/8	M52	221
10	250	675	375	229	277.4	539.8	165.1	13	12	2 1/2	490	2 5/8	M64	425
12	300	760	441	254	328.2	619.1	184.2	13	12	2 3/4	540	2 7/8	M72	500

LAP JOINT FLANGE CLASS 300 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	Machine Bolt Length	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	95	38	22	22.9	66.7	14.3	3	4	1/2	55	65	5/8	M14	1.2
3/4	20	115	48	25	28.2	82.6	15.9	3	4	5/8	65	75	3/4	M16	1.4
1	25	125	54	27	34.9	88.9	17.5	3	4	5/8	65	75	3/4	M16	1.4
1 1/4	32	135	64	27	43.7	98.4	19.1	5	4	5/8	70	85	3/4	M16	1.8
1 1/2	40	155	70	30	50	114.3	20.7	6	4	3/4	75	90	7/8	M20	2.7
2	50	165	84	33	62.5	127	22.3	8	8	5/8	75	90	3/4	M16	3.2
2 1/2	65	190	100	38	75.4	149.2	25.4	8	8	3/4	85	100	7/8	M20	4.6
3	80	210	117	43	91.4	168.3	28.6	10	8	3/4	90	110	7/8	M20	5.9
3 1/2	90	230	133	44	104.1	184.2	30.2	11	8	3/4	95	110	7/8	M20	7.7
4	100	255	146	48	116.8	200	31.8	11	8	3/4	95	115	7/8	M20	10
5	125	280	178	51	144.4	235	35	11	8	3/4	110	120	7/8	M20	12.7
6	150	320	206	52	171.4	269.9	36.6	13	12	3/4	110	120	7/8	M20	17.7
8	200	380	260	62	222.2	330.2	41.3	13	12	7/8	120	140	1	M24	26
10	250	445	321	95	277.4	387.4	47.7	13	16	1	140	160	1 1/8	M27	36
12	300	520	375	102	328.2	450.8	50.8	13	16	1 1/8	145	170	1 1/4	M30	52
14	350	585	425	111	360.2	514.4	54	13	20	1 1/8	160	180	1 1/4	M30	75
16	400	650	483	121	411.2	571.5	57.2	13	20	1 1/4	165	190	1 3/8	M33	86
18	450	710	533	130	462.3	628.6	60.4	13	24	1 1/4	170	195	1 3/8	M33	113
20	500	775	587	140	514.4	685.8	63.5	13	24	1 1/4	185	205	1 3/8	M33	143
24	600	915	702	153	616	812.8	69.9	13	24	1 1/2	205	230	1 5/8	M39	216

LAP JOINT FLANGE CLASS 400 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	95	38	22	22.9	66.7	14.3	3	4	1/2	75	5/8	M14	1.3
3/4	20	115	48	25	28.2	82.6	15.9	3	4	5/8	90	3/4	M16	1.5
1	25	125	54	27	34.9	88.9	17.5	3	4	5/8	90	3/4	M16	1.8
1 1/4	32	135	64	29	43.7	98.4	20.7	5	4	5/8	95	3/4	M16	2.3
1 1/2	40	155	70	32	50	114.3	22.3	6	4	3/4	110	7/8	M20	3.2
2	50	165	84	37	62.5	127	25.4	8	8	5/8	110	3/4	M16	4.1
2 1/2	65	190	100	41	75.4	149.2	28.6	8	8	3/4	120	7/8	M20	5.9
3	80	210	117	46	91.4	168.3	31.8	10	8	3/4	125	7/8	M20	7.3
3 1/2	90	230	133	49	104.1	184.2	35	10	8	7/8	140	1	M24	9.6
4	100	255	146	51	116.8	200	35	11	8	7/8	140	1	M24	11.8
5	125	280	178	54	144.5	235	38.1	11	8	7/8	145	1	M24	14.1
6	150	320	206	57	171.4	269.9	41.3	13	12	7/8	150	1	M24	20
8	200	380	260	68	222.2	330	47.7	13	12	1	170	1 1/8	M27	31
10	250	445	321	102	277.4	387.4	54	13	16	1 1/8	190	1 1/4	M30	42
12	300	520	375	108	328.2	450.8	57.2	13	16	1 1/4	205	1 3/8	M33	59
14	350	585	425	117	360.2	514.4	60.4	13	20	1 1/4	210	1 3/8	M33	82
16	400	650	483	127	411.2	571.5	63.5	13	20	1 3/8	220	1 1/2	M36	107
18	450	710	533	137	462.3	628.6	66.7	13	24	1 3/8	230	1 1/2	M36	130
20	500	775	587	146	514.4	685.8	69.9	13	24	1 1/2	240	1 3/4	M39	157
24	600	915	702	159	616	812.8	76.2	13	24	1 3/4	265	1 7/8	M45	232

LAP JOINT FLANGE CLASS 600 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	95	38	22	22.9	66.7	14.3	3	4	1/2	75	5/8	M14	1.3
3/4	20	115	48	25	28.2	82.6	15.9	3	4	5/8	90	3/4	M16	1.4
1	25	125	54	27	34.9	88.9	17.5	3	4	5/8	90	3/4	M16	1.8
1 1/4	32	135	64	29	43.7	98.4	20.7	5	4	5/8	95	3/4	M16	2.3
1 1/2	40	155	70	32	50	114.3	22.3	6	4	3/4	110	7/8	M20	3.2
2	50	165	84	37	62.5	127	25.4	8	8	5/8	110	3/4	M16	4.1
2 1/2	65	190	100	41	75.4	149.2	28.6	8	8	3/4	120	7/8	M20	5.9
3	80	210	117	46	91.4	168.3	31.8	10	8	3/4	125	7/8	M20	7.3
3 1/2	90	230	133	49	104.1	184.2	35	11	8	7/8	140	1	M24	9.6
4	100	275	152	54	116.8	215.9	38.1	11	8	7/8	145	1	M24	16.8
5	125	330	189	60	144.4	266.7	44.5	11	8	1	165	1 1/8	M27	29
6	150	355	222	67	171.4	292.1	47.7	13	12	1	170	1 1/8	M27	36
8	200	420	273	76	222.2	349.2	55.6	13	12	1 1/8	190	1 1/4	M30	52
10	250	510	343	111	277.4	431.8	63.5	13	16	1 1/4	215	1 3/8	M33	77
12	300	560	400	117	328.2	489	66.7	13	20	1 1/4	220	1 3/8	M33	91
14	350	605	432	127	360.2	527	69.9	13	20	1 3/8	235	1 1/2	M36	105
16	400	685	495	140	411.2	603.2	76.2	13	20	1 1/2	255	1 5/8	M39	150
18	450	745	546	152	462.3	654	82.6	13	20	1 5/8	275	1 3/4	M42	182
20	500	815	610	165	514.4	723.9	88.9	13	24	1 5/8	285	1 3/4	M42	232
24	600	940	718	184	616	838.2	101.6	13	24	1 7/8	330	2	M48	332

LAP JOINT FLANGE CLASS 900 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	120	38	32	22.9	82.6	22.3	3	4	3/4	110	7/8	M20	1.8
3/4	20	130	44	35	28.2	88.9	25.4	3	4	3/4	115	7/8	M20	2.3
1	25	150	52	41	34.9	101.6	28.6	3	4	7/8	125	1	M24	3.6
1 1/4	32	160	64	41	43.7	111.1	28.6	5	4	7/8	125	1	M24	4.1
1 1/2	40	180	70	44	50	123.8	31.8	6	4	1	140	1 1/8	M27	5.5
2	50	215	105	57	62.5	165.1	38.1	8	8	7/8	145	1	M24	11.5
2 1/2	65	245	124	64	75.4	190.5	41.3	8	8	1	160	1 1/8	M27	16.5
3	80	240	127	54	91.4	190.5	38.1	10	8	7/8	145	1	M24	12
4	100	290	159	70	116.8	235	44.5	11	8	1 1/8	170	1 1/4	M30	24
5	125	350	190	79	144.4	279.4	50.8	11	8	1 1/4	190	1 3/8	M33	38
6	150	380	235	86	171.4	317.5	55.6	13	12	1 1/8	190	1 1/4	M30	50
8	200	470	298	114	222.2	393.7	63.5	13	12	1 3/8	220	1 1/2	M36	78
10	250	545	368	127	277.4	469.9	69.9	13	16	1 3/8	235	1 1/2	M36	112
12	300	610	419	143	328.2	533.4	79.4	13	20	1 3/8	255	1 1/2	M36	148
14	350	640	451	156	360.2	558.8	85.8	13	20	1 1/2	275	1 5/8	M39	182
16	400	705	508	165	411.2	616	88.9	13	20	1 5/8	285	1 3/4	M42	193
18	450	785	565	190	462.3	685.8	101.6	13	20	1 7/8	325	2	M48	258
20	500	855	622	210	514.4	749.3	108	13	20	2	350	2 1/8	M52	317
24	600	1040	749	267	616	901.7	139.7	13	20	2 1/2	440	2 5/8	M64	608

LAP JOINT FLANGE CLASS 1500 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	120	38	32	22.9	82.6	22.3	3	4	3/4	110	7/8	M20	1.8
3/4	20	130	44	35	28.2	88.9	25.4	3	4	3/4	115	7/8	M20	2.3
1	25	150	52	41	34.9	101.6	28.6	3	4	7/8	125	1	M24	3.7
1 1/4	32	160	64	41	43.7	111.1	28.6	5	4	7/8	125	1	M24	4.1
1 1/2	40	180	70	44	50	123.8	31.8	6	4	1	140	1 1/8	M27	5.5
2	50	215	105	57	62.5	165.1	38.1	8	8	7/8	145	1	M24	9.8
2 1/2	65	245	124	64	75.4	190.5	41.3	8	8	1	160	1 1/8	M27	16.4
3	80	265	133	73	91.4	203.2	47.7	10	8	1 1/8	180	1 1/4	M30	21.8
4	100	310	162	90	116.8	241.3	54	11	8	1 1/4	195	1 3/8	M33	33
5	125	375	197	105	144.4	292.1	73.1	11	8	1 1/2	250	1 5/8	M39	59
6	150	395	229	119	171.4	317.5	82.6	13	12	1 3/8	260	1 1/2	M36	75
8	200	485	292	143	222.2	393.7	92.1	13	12	1 5/8	290	1 3/4	M42	118
10	250	585	368	178	277.4	482.6	108	13	12	1 7/8	335	2	M48	198
12	300	675	451	219	328.2	571.5	123.9	13	16	2	375	2 1/8	M52	264
14	350	750	495	241	360.2	635	133.4	13	16	2 1/4	405	2 3/8	M56	341
16	400	825	552	260	411.2	704.8	146.1	13	16	2 1/2	445	2 5/8	M64	454
18	450	915	597	276	462.3	774.7	162	13	16	2 3/4	495	2 7/8	M72	590
20	500	985	641	292	514.4	831.8	177.8	13	16	3	540	3 1/8	M76	792
24	600	1170	762	330	616	990.6	203.2	13	16	3 1/2	615	3 5/8	M90	1248

LAP JOINT FLANGE CLASS 2500 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	135	43	40	22.9	88.9	30.2	3	4	3/4	120	7/8	M20	3.2
3/4	20	140	51	43	28.2	95.2	31.8	3	4	3/4	125	7/8	M20	3.7
1	25	160	57	48	34.9	108	35	3	4	7/8	140	1	M24	5
1 1/4	32	185	73	52	43.7	130.2	38.1	5	4	1	150	1 1/8	M27	7.5
1 1/2	40	205	79	60	50	146	44.5	6	4	1 1/8	170	1 1/4	M30	10
2	50	235	95	70	62.5	171.4	50.9	8	8	1	180	1 1/8	M27	17.5
2 1/2	65	265	114	79	75.4	196.8	57.2	8	8	1 1/8	195	1 1/4	M30	23
3	80	305	133	92	91.4	228.6	66.7	10	8	1 1/4	220	1 3/8	M33	37.8
4	100	355	165	108	116.8	273	76.2	11	8	1 1/2	255	1 5/8	M39	57
5	125	420	203	130	144.4	323.8	92.1	11	8	1 3/4	300	1 7/8	M45	95
6	150	485	235	152	171.4	368.3	108	13	8	2	345	2 1/8	M52	148
8	200	550	305	178	222.2	438.2	127	13	12	2	380	2 1/8	M52	221
10	250	675	375	229	277.4	539.8	165.1	13	12	2 1/2	490	2 5/8	M64	425
12	300	760	441	254	328.2	619.1	184.2	13	12	2 3/4	540	2 7/8	M72	500

LAP JOINT FLANGE CLASS 400 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	95	38	22	22.9	66.7	14.3	3	4	1/2	75	5/8	M14	1.3
3/4	20	115	48	25	28.2	82.6	15.9	3	4	5/8	90	3/4	M16	1.5
1	25	125	54	27	34.9	88.9	17.5	3	4	5/8	90	3/4	M16	1.8
1 1/4	32	135	64	29	43.7	98.4	20.7	5	4	5/8	95	3/4	M16	2.3
1 1/2	40	155	70	32	50	114.3	22.3	6	4	3/4	110	7/8	M20	3.2
2	50	165	84	37	62.5	127	25.4	8	8	5/8	110	3/4	M16	4.1
2 1/2	65	190	100	41	75.4	149.2	28.6	8	8	3/4	120	7/8	M20	5.9
3	80	210	117	46	91.4	168.3	31.8	10	8	3/4	125	7/8	M20	7.3
3 1/2	90	230	133	49	104.1	184.2	35	10	8	7/8	140	1	M24	9.6
4	100	255	146	51	116.8	200	35	11	8	7/8	140	1	M24	11.8
5	125	280	178	54	144.5	235	38.1	11	8	7/8	145	1	M24	14.1
6	150	320	206	57	171.4	269.9	41.3	13	12	7/8	150	1	M24	20
8	200	380	260	68	222.2	330	47.7	13	12	1	170	1 1/8	M27	31
10	250	445	321	102	277.4	387.4	54	13	16	1 1/8	190	1 1/4	M30	42
12	300	520	375	108	328.2	450.8	57.2	13	16	1 1/4	205	1 3/8	M33	59
14	350	585	425	117	360.2	514.4	60.4	13	20	1 1/4	210	1 3/8	M33	82
16	400	650	483	127	411.2	571.5	63.5	13	20	1 3/8	220	1 1/2	M36	107
18	450	710	533	137	462.3	628.6	66.7	13	24	1 3/8	230	1 1/2	M36	130
20	500	775	587	146	514.4	685.8	69.9	13	24	1 1/2	240	1 3/4	M39	157
24	600	915	702	159	616	812.8	76.2	13	24	1 3/4	265	1 7/8	M45	232

LAP JOINT FLANGE CLASS 600 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	95	38	22	22.9	66.7	14.3	3	4	1/2	75	5/8	M14	1.3
3/4	20	115	48	25	28.2	82.6	15.9	3	4	5/8	90	3/4	M16	1.4
1	25	125	54	27	34.9	88.9	17.5	3	4	5/8	90	3/4	M16	1.8
1 1/4	32	135	64	29	43.7	98.4	20.7	5	4	5/8	95	3/4	M16	2.3
1 1/2	40	155	70	32	50	114.3	22.3	6	4	3/4	110	7/8	M20	3.2
2	50	165	84	37	62.5	127	25.4	8	8	5/8	110	3/4	M16	4.1
2 1/2	65	190	100	41	75.4	149.2	28.6	8	8	3/4	120	7/8	M20	5.9
3	80	210	117	46	91.4	168.3	31.8	10	8	3/4	125	7/8	M20	7.3
3 1/2	90	230	133	49	104.1	184.2	35	11	8	7/8	140	1	M24	9.6
4	100	275	152	54	116.8	215.9	38.1	11	8	7/8	145	1	M24	16.8
5	125	330	189	60	144.4	266.7	44.5	11	8	1	165	1 1/8	M27	29
6	150	355	222	67	171.4	292.1	47.7	13	12	1	170	1 1/8	M27	36
8	200	420	273	76	222.2	349.2	55.6	13	12	1 1/8	190	1 1/4	M30	52
10	250	510	343	111	277.4	431.8	63.5	13	16	1 1/4	215	1 3/8	M33	77
12	300	560	400	117	328.2	489	66.7	13	20	1 1/4	220	1 3/8	M33	91
14	350	605	432	127	360.2	527	69.9	13	20	1 3/8	235	1 1/2	M36	105
16	400	685	495	140	411.2	603.2	76.2	13	20	1 1/2	255	1 5/8	M39	150
18	450	745	546	152	462.3	654	82.6	13	20	1 5/8	275	1 3/4	M42	182
20	500	815	610	165	514.4	723.9	88.9	13	24	1 5/8	285	1 3/4	M42	232
24	600	940	718	184	616	838.2	101.6	13	24	1 7/8	330	2	M48	332

LAP JOINT FLANGE CLASS 900 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	120	38	32	22.9	82.6	22.3	3	4	3/4	110	7/8	M20	1.8
3/4	20	130	44	35	28.2	88.9	25.4	3	4	3/4	115	7/8	M20	2.3
1	25	150	52	41	34.9	101.6	28.6	3	4	7/8	125	1	M24	3.6
1 1/4	32	160	64	41	43.7	111.1	28.6	5	4	7/8	125	1	M24	4.1
1 1/2	40	180	70	44	50	123.8	31.8	6	4	1	140	1 1/8	M27	5.5
2	50	215	105	57	62.5	165.1	38.1	8	8	7/8	145	1	M24	11.5
2 1/2	65	245	124	64	75.4	190.5	41.3	8	8	1	160	1 1/8	M27	16.5
3	80	240	127	54	91.4	190.5	38.1	10	8	7/8	145	1	M24	12
4	100	290	159	70	116.8	235	44.5	11	8	1 1/8	170	1 1/4	M30	24
5	125	350	190	79	144.4	279.4	50.8	11	8	1 1/4	190	1 3/8	M33	38
6	150	380	235	86	171.4	317.5	55.6	13	12	1 1/8	190	1 1/4	M30	50
8	200	470	298	114	222.2	393.7	63.5	13	12	1 3/8	220	1 1/2	M36	78
10	250	545	368	127	277.4	469.9	69.9	13	16	1 3/8	235	1 1/2	M36	112
12	300	610	419	143	328.2	533.4	79.4	13	20	1 3/8	255	1 1/2	M36	148
14	350	640	451	156	360.2	558.8	85.8	13	20	1 1/2	275	1 5/8	M39	182
16	400	705	508	165	411.2	616	88.9	13	20	1 5/8	285	1 3/4	M42	193
18	450	785	565	190	462.3	685.8	101.6	13	20	1 7/8	325	2	M48	258
20	500	855	622	210	514.4	749.3	108	13	20	2	350	2 1/8	M52	317
24	600	1040	749	267	616	901.7	139.7	13	20	2 1/2	440	2 5/8	M64	608

LAP JOINT FLANGE CLASS 1500 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	120	38	32	22.9	82.6	22.3	3	4	3/4	110	7/8	M20	1.8
3/4	20	130	44	35	28.2	88.9	25.4	3	4	3/4	115	7/8	M20	2.3
1	25	150	52	41	34.9	101.6	28.6	3	4	7/8	125	1	M24	3.7
1 1/4	32	160	64	41	43.7	111.1	28.6	5	4	7/8	125	1	M24	4.1
1 1/2	40	180	70	44	50	123.8	31.8	6	4	1	140	1 1/8	M27	5.5
2	50	215	105	57	62.5	165.1	38.1	8	8	7/8	145	1	M24	9.8
2 1/2	65	245	124	64	75.4	190.5	41.3	8	8	1	160	1 1/8	M27	16.4
3	80	265	133	73	91.4	203.2	47.7	10	8	1 1/8	180	1 1/4	M30	21.8
4	100	310	162	90	116.8	241.3	54	11	8	1 1/4	195	1 3/8	M33	33
5	125	375	197	105	144.4	292.1	73.1	11	8	1 1/2	250	1 5/8	M39	59
6	150	395	229	119	171.4	317.5	82.6	13	12	1 3/8	260	1 1/2	M36	75
8	200	485	292	143	222.2	393.7	92.1	13	12	1 5/8	290	1 3/4	M42	118
10	250	585	368	178	277.4	482.6	108	13	12	1 7/8	335	2	M48	198
12	300	675	451	219	328.2	571.5	123.9	13	16	2	375	2 1/8	M52	264
14	350	750	495	241	360.2	635	133.4	13	16	2 1/4	405	2 3/8	M56	341
16	400	825	552	260	411.2	704.8	146.1	13	16	2 1/2	445	2 5/8	M64	454
18	450	915	597	276	462.3	774.7	162	13	16	2 3/4	495	2 7/8	M72	590
20	500	985	641	292	514.4	831.8	177.8	13	16	3	540	3 1/8	M76	792
24	600	1170	762	330	616	990.6	203.2	13	16	3 1/2	615	3 5/8	M90	1248

LAP JOINT FLANGE CLASS 2500 DIMENSIONS

Size in Inch	Size in mm	Outer Diameter	Flange Thick.	Lapped Thick.	Lapped ID	PCD	Lapped Thick.	Lapped Radius	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	G
1/2	15	135	43	40	22.9	88.9	30.2	3	4	3/4	120	7/8	M20	3.2
3/4	20	140	51	43	28.2	95.2	31.8	3	4	3/4	125	7/8	M20	3.7
1	25	160	57	48	34.9	108	35	3	4	7/8	140	1	M24	5
1 1/4	32	185	73	52	43.7	130.2	38.1	5	4	1	150	1 1/8	M27	7.5
1 1/2	40	205	79	60	50	146	44.5	6	4	1 1/8	170	1 1/4	M30	10
2	50	235	95	70	62.5	171.4	50.9	8	8	1	180	1 1/8	M27	17.5
2 1/2	65	265	114	79	75.4	196.8	57.2	8	8	1 1/8	195	1 1/4	M30	23
3	80	305	133	92	91.4	228.6	66.7	10	8	1 1/4	220	1 3/8	M33	37.8
4	100	355	165	108	116.8	273	76.2	11	8	1 1/2	255	1 5/8	M39	57
5	125	420	203	130	144.4	323.8	92.1	11	8	1 3/4	300	1 7/8	M45	95
6	150	485	235	152	171.4	368.3	108	13	8	2	345	2 1/8	M52	148
8	200	550	305	178	222.2	438.2	127	13	12	2	380	2 1/8	M52	221
10	250	675	375	229	277.4	539.8	165.1	13	12	2 1/2	490	2 5/8	M64	425
12	300	760	441	254	328.2	619.1	184.2	13	12	2 3/4	540	2 7/8	M72	500

Manufacturing process and features of Lap Joint Flange

Manufacturing Process:

Material Selection : Choose suitable materials such as carbon steel, stainless steel, or alloy steel based on application requirements.
Cutting : Cut the raw material into the required shape and size using cutting machines or torches.
Forming the Flange Ring : Form the flange ring by bending or rolling the cut material to the desired diameter and shape.
Machining : Machine the flange ring to precise dimensions using CNC machines, ensuring smooth surfaces and accurate dimensions.
Lap Joint Stub End Preparation : Prepare the lap joint stub end separately, ensuring it matches the pipe size and flange dimensions.
Drilling Bolt Holes : Drill bolt holes into the flange ring and lap joint stub end according to standards like ANSI B16.5 for accurate alignment.
Assembly : Assemble the lap joint flange by sliding the lap joint stub end into the flange ring and aligning the bolt holes.
Welding : Weld the lap joint stub end to the flange ring at the inner edge, ensuring a secure joint that allows rotational adjustment.
Surface Finishing : Perform surface treatments such as grinding, polishing, or coating to improve corrosion resistance and aesthetics.
Inspection and Testing : Conduct rigorous inspection and testing, including dimensional checks and non-destructive testing (NDT) methods, to ensure quality and reliability.
Marking and Packaging : Mark the flange with relevant information such as material grade, size, pressure rating, and standards compliance. Package the flanges carefully to protect them during transportation.

Features of Lap Joint Flange :

Rotational Capability : Allows for easy alignment and adjustment of the flange face even after assembly, reducing installation time and complexity.
Cost-Effective Assembly : Facilitates cost savings by using a lower-cost lap joint stub end paired with a standard flange ring.
Easy Inspection : Simplifies inspection and maintenance by allowing the lap joint stub end to be easily removed for examination or replacement without disturbing the flange ring.
Corrosion Resistance : Available in materials with excellent corrosion resistance properties, ensuring longevity in corrosive environments.
Versatility : Suitable for applications where frequent dismantling or reassembly is required, such as in pipelines requiring periodic cleaning or inspection.
Pressure Rating : Manufactured in various pressure ratings to suit different industrial applications, from low to high-pressure systems.
Standards Compliance : Designed and manufactured in compliance with international standards (e.g., ANSI, ASME, ASTM) to ensure quality and reliability.
Wide Range of Sizes : Available in a wide range of sizes to accommodate different pipe diameters and system requirements.

Lap Joint Flanges are versatile components used in piping systems where easy assembly, rotational capability, and cost-efficiency are essential. They provide reliable connections, facilitate maintenance, and ensure efficient operation across various industrial applications.

Application Of Lap Joint Flange

Oil and Gas	Essential for connecting sections of pipelines where flexibility in alignment and maintenance is crucial, especially in offshore platforms and refineries.
Chemical Industry	Facilitates connections in chemical plants where frequent dismantling and reassembly for maintenance or product changes are necessary.
Power Generation	Used in power plants for connecting boiler and turbine systems, providing easy access for maintenance and inspection.
Water Treatment	Enables connections in water treatment facilities, allowing for easy installation and replacement of pipeline sections
Pulp and Paper Industry	Supports transitions in paper mills and pulp processing plants where varying pipe sizes and frequent maintenance are common.
Food and Beverage Processing	Used in processing facilities to facilitate sanitary connections and ease of maintenance for cleaning and inspection.
Pharmaceutical Industry	Critical in pharmaceutical manufacturing for connecting sterile pipelines with minimal contamination risk during assembly and maintenance.
Mining and Mineral Processing	Facilitates connections in mining operations for transporting ores and minerals, ensuring operational efficiency and ease of maintenance.
Construction and Infrastructure	Found in building HVAC systems and municipal infrastructure projects where flexibility and ease of assembly are essential for efficient fluid distribution.
Shipbuilding and Marine Applications	Used in shipbuilding for piping systems requiring easy alignment and maintenance access, crucial for operations at sea.

Lap Joint Flange Available Types

Lap Joint Flange	Lapped Joint(LJFF) Flange
ANSI B16.5 Lap Joint Flanges	Lap Joint Flange Dimensions
ASME B16.5 Lapped Joint Flanges	ANSI B16.5 Class 150 Lap Joint Flanges
Stainless Steel Lap Joint Flanges Suppliers	SS Lap Joint Flange
Lapped Joint Plate Flanges Dealer	ASME B16.47 Series A and B Lap Joint Flanges Exporters
ANSI B16.5 class 150 Lap Joint Flange	ANSI 150 Lap Joint Flange
Carbon Steel Lap Joint Flange	High Quality Lap Joint Flanges Manufacturers
ASTM A182 Stainless Steel Lap Joint Flange	Duplex Steel Lapped Joint Flange
Super Duplex Steel Lap Joint Forged Flange	Copper Nickel Lap Joint Pipe Flanges
High Nickel Alloy Lapped Joint Flanges	Hastelloy Flat Faced Lap Joint Flanges Stockists
Titanium ASME B16.47 Series A and B Lap Joint Flanges	Inconel Lap Joint Flanges

Others Products

Frequently Asked Questions

Most frequent questions and answers

A lap joint flange is a type of flange that consists of two parts: a loose flange and a backing flange. The loose flange slides over the end of the pipe, while the backing flange is welded to the pipe, allowing the loose flange to be bolted to it. This design allows for easy alignment and disassembly, making lap joint flanges ideal for applications requiring frequent maintenance or where alignment is critical.

Lap joint flanges are available in a range of sizes to match different pipe diameters. Standard sizes generally range from 1/2 inch to 24 inches or more. Custom sizes and specifications can also be manufactured to meet specific needs.

Lap joint flanges are installed by first welding the backing flange to the pipe. The loose flange is then placed over the backing flange and bolted into position. A gasket is typically used between the loose flange and the pipe to ensure a leak-proof seal. Proper alignment and tightening are crucial to ensure a secure connection.

Yes, we offer custom manufacturing solutions for lap joint flanges to meet specific requirements. Please contact us with your detailed specifications, and we will work with you to produce flanges tailored to your needs.

The lead time for lap joint flanges depends on the complexity and volume of the order. After reviewing your specifications, we will provide an estimated lead time. We are committed to delivering all projects on schedule while maintaining the highest quality standards.

Yes, lap joint flanges can be used for both liquid and gas applications, provided they are made from appropriate materials and installed correctly to handle the specific conditions of the system, including pressure and temperature.

Lap joint flanges are commonly made from materials such as carbon steel, stainless steel, alloy steel, and other metals. The choice of material depends on the specific application requirements, including the type of fluid or gas, temperature, pressure, and environmental conditions.

Lap joint flanges are used in various industries, including oil and gas, petrochemical, water treatment, and construction. They are particularly useful in applications where pipes need to be frequently disassembled for maintenance, or where alignment and adjustment are necessary. They also provide a smooth connection that minimizes turbulence in fluid flow.

Lap joint flanges are manufactured to comply with various industry standards, such as ASME B16.5, ASME B16.47, and API standards. These standards define the dimensions, tolerances, and material requirements to ensure compatibility and reliability in piping systems.

Lap joint flanges offer several advantages, including:

Ease of installation and removal: Allows for quick disassembly and maintenance.
Alignment flexibility: Enables easy adjustment and alignment of pipes.
Smooth flow: Minimizes turbulence in fluid flow due to the smooth connection.
High strength and durability: Made from robust materials to handle high-pressure and temperature conditions.
Compliance with standards: Ensures quality and reliability in piping systems.

Regular inspection of lap joint flanges involves checking for leaks and ensuring that the flanges remain securely bolted. It is important to inspect for any signs of corrosion, wear, or damage that could affect the integrity of the connection.