RTJ Flange| ANSI/ASME B16.5 Ring Type Joint Flange

ASME B16.5, ASME B16.47 Series A and Series B RTJ Flange Supplier

A Ring Type Joint Flange is a specialized flange designed for high-pressure, high-temperature applications where a strong, reliable seal is crucial. These flanges feature a groove in the face that accommodates a ring-shaped gasket, typically made from metal, which forms a tight seal when the flanges are bolted together. RTJ flanges are commonly used in industries such as oil and gas, petrochemical, and chemical processing, where they provide leak-proof connections in demanding environments. They are available in various sizes and materials, including carbon steel, stainless steel, and alloy steels, to suit specific system requirements. RTJ flanges are designed to meet rigorous international standards like ASME B16.5, ensuring their durability and performance under extreme conditions.

Ample Alloys is a leading Manufacturer, supplier of high-quality RTJ Flanges, offering reliable and durable solutions for industries that require secure, high-pressure connections. With years of expertise in the manufacturing and distribution of flanges, We ensures that all RTJ flanges are made with precision and meet international standards, including ASME B16.5. We are known for commitment to quality control, timely delivery, and customization options, making a trusted choice for customers looking for dependable RTJ flanges for applications. With an emphasis on customer satisfaction and technical expertise, Ample Alloys is the go-to supplier for premium RTJ flanges tailored to meet the toughest operational demands.

ASME/ANSI B16.5, B16.47 Ring Type Joint Flange

API Ring Type Joint Flange, RTJ Flange for high pressure, Forged Ring Type Joint Flange, Stainless Steel Ring Type Joint Flange, RTJ Flange welding, RTJ Flange API 6A, RTJ Flange with groove, Flange RTJ sealing surface finish

ASME/ANSI B16.5 RTJ Flange

Size Range

15mm ( 1/2" NPS ) up to 600mm ( 24" NPS ), For 2500# in sizes from NPS 1/2 to NPS 12

Flange Face Type

FF—Flat Face, RF—Raised Face, FM—Female Face, M—Male Face, T—Tongue Face, G—Groove Face, RJ—Ring Joint.

Stainless Steel

ASTM A182 F 304, 304L, 304H, 316, 316L, 316H, 317, 317L, 321, 321H, 310, 310S, 347, 904L, etc.

Standards / Dimension

ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN

Carbon Steel

ASTM A105/A105N (SA105N), LTCS A350 LF2, A694

Alloy Steel

ASTM A182 / SA182 - F1 / F5 / F9 / F11 / F12 / F22 / F91

Pressure Class

150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64.

Duplex & Super Duplex

ASTM A182 / ASME SA182 - S31803, S32205, 2205, S32750, S32760, S32950, 2507.

MTC

EN 10204 3.2 and EN 10204 3.1, Test Certificates certifying NACE MR0175, NACE MR0103

ASME/ANSI B16.5, B16.47 RTJ Flange Dimensions

ASME B16.5 Weld Neck RTJ Flange ( Class 150 ) - Dimensions & Weight

Size in Inch	Size in mm	Outer Dia.	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	RTJ RF Dia	RTJ RF Height	PCD	RTJ Pitch dia	RTJ Depth	RTJ Width	Bore
		A	B	C	D	E	F	G	H	I	J	K	L
1/2	15	90	9.6	30	21.3	46	N/A	N/A	60.3	N/A	N/A	N/A	Welding Neck bore is derived from the pipe schedule
3/4	20	100	11.2	38	26.7	51	N/A	N/A	69.9	N/A	N/A	N/A
1	25	110	12.7	49	33.4	54	63.5	6.35	79.4	47.63	6.35	8.74
1 1/4	32	115	14.3	59	42.2	56	73	6.35	88.9	57.15	6.35	8.74
1 1/2	40	125	15.9	65	48.3	60	82.5	6.35	98.4	65.07	6.35	8.74
2	50	150	17.5	78	60.3	62	102	6.35	120.7	82.55	6.35	8.74
2 1/2	65	180	20.7	90	73	68	121	6.35	139.7	101.6	6.35	8.74
3	80	190	22.3	108	88.9	68	133	6.35	152.4	114.3	6.35	8.74
3 1/2	90	215	22.3	122	101.6	70	154	6.35	177.8	131.78	6.35	8.74
4	100	230	22.3	135	114.3	75	171	6.35	190.5	149.23	6.35	8.74
5	125	255	22.3	164	141.3	87	194	6.35	215.9	171.45	6.35	8.74
6	150	280	23.9	192	168.3	87	219	6.35	241.3	193.68	6.35	8.74
8	200	345	27	246	219.1	100	273	6.35	298.5	247.65	6.35	8.74
10	250	405	28.6	305	273	100	330	6.35	362	304.8	6.35	8.74
12	300	485	30.2	365	323.8	113	406	6.35	431.8	381	6.35	8.74
14	350	535	33.4	400	355.6	125	425	6.35	476.3	396.88	6.35	8.74
16	400	595	35	457	406.4	125	483	6.35	539.8	454.03	6.35	8.74
18	450	635	38.1	505	457.2	138	546	6.35	577.9	517.53	6.35	8.74
20	500	700	41.3	559	508	143	597	6.35	635	558.8	6.35	8.74
24	600	815	46.1	663	610	151	711	6.35	749.3	673.1	6.35	8.74

ASME B16.5 Weld Neck RTJ Flange ( Class 300 ) - Dimensions & Weight

Size in Inch	Size in mm	Outer Dia.	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	RTJ RF Dia	RTJ RF Height	PCD	RTJ Pitch dia	RTJ Depth	RTJ Width	Bore
		A	B	C	D	E	F	G	H	I	J	K	L
1/2	15	95	12.7	38	21.3	51	51	5.54	66.7	34.14	5.54	7.14	Welding Neck bore is derived from the pipe schedule
3/4	20	115	14.3	48	26.7	56	63.5	6.35	82.6	42.88	6.35	8.74
1	25	125	15.9	54	33.4	60	70	6.35	88.9	50.8	6.35	8.74
1 1/4	32	135	17.5	64	42.2	64	79.5	6.35	98.4	60.33	6.35	8.74
1 1/2	40	155	19.1	70	48.3	67	90.5	6.35	114.3	68.27	6.35	8.74
2	50	165	20.7	84	60.3	68	108	7.92	127	82.55	7.92	11.91
2 1/2	65	190	23.9	100	73	75	127	7.92	149.2	101.6	7.92	11.91
3	80	210	27	117	88.9	78	146	7.92	168.3	123.83	7.92	11.91
3 1/2	90	230	28.6	133	101.6	79	159	7.92	184.2	131.78	7.92	11.91
4	100	255	30.2	146	114.3	84	175	7.92	200	149.23	7.92	11.91
5	125	280	33.4	178	141.3	97	210	7.92	235	180.98	7.92	11.91
6	150	320	35	206	168.3	97	241	7.92	269.9	211.12	7.92	11.91
8	200	380	39.7	260	219.1	110	302	7.92	330.2	269.88	7.92	11.91
10	250	445	46.1	321	273	116	356	7.92	387.4	323.85	7.92	11.91
12	300	520	49.3	375	323.8	129	413	7.92	450.8	381	7.92	11.91
14	350	585	52.4	425	355.6	141	457	7.92	514.4	419.1	7.92	11.91
16	400	650	55.6	483	406.4	144	508	7.92	571.5	469.9	7.92	11.91
18	450	710	58.8	533	457	157	575	7.92	628.6	533.4	7.92	11.91
20	500	775	62	587	508	160	635	9.53	685.8	584.2	9.53	13.49
24	600	915	68.3	702	610	167	749	11.13	812.8	692.15	11.13	16.66

ASME B16.5 Weld Neck RTJ Flange ( Class 400 ) - Dimensions & Weight

Size in Inch	Size in mm	Outer Dia.	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	RTJ RF Dia	RTJ RF Height	PCD	RTJ Pitch dia	RTJ Depth	RTJ Width	Bore
		A	B	C	D	E	F	G	H	I	J	K	L
1/2	15	95	14.3	38	21.3	52	51	5.54	66.7	34.14	5.54	7.14	Welding Neck bore is derived from the pipe schedule
3/4	20	115	15.9	48	26.7	57	63.5	6.35	82.6	42.88	6.35	8.74
1	25	125	17.5	54	33.4	62	70	6.35	88.9	50.8	6.35	8.74
1 1/4	32	135	20.7	64	42.2	67	79.5	6.35	98.4	60.33	6.35	8.74
1 1/2	40	155	22.3	70	48.3	70	90.5	6.35	114.3	68.27	6.35	8.74
2	50	165	25.4	84	60.3	73	108	7.92	127	82.55	7.92	11.9
2 1/2	65	190	28.6	100	73	79	127	7.92	149.2	101.6	7.92	11.9
3	80	210	31.8	117	88.9	83	146	7.92	168.3	123.83	7.92	11.9
3 1/2	90	230	35	133	101.6	86	159	7.92	184.2	131.78	7.92	11.9
4	100	255	35	146	114.3	89	175	7.92	200	149.23	7.92	11.91
5	125	280	38.1	178	141.3	102	210	7.92	235	180.98	7.92	11.91
6	150	320	41.3	206	168.3	103	241	7.92	269.9	211.12	7.92	11.91
8	200	380	47.7	260	219.1	117	302	7.92	330	269.88	7.92	11.91
10	250	445	54	321	273	124	356	7.92	387.4	323.85	7.92	11.91
12	300	520	57.2	375	323.8	137	413	7.92	450.8	381	7.92	11.91
14	350	585	60.4	425	355.6	149	457	7.92	514.4	419.1	7.92	11.91
16	400	650	63.5	483	406.4	152	508	7.92	571.5	469.9	7.92	11.91
18	450	710	66.7	533	457	165	575	7.92	628.6	533.4	7.92	11.91
20	500	775	69.9	587	508	168	635	9.53	685.8	584.2	9.53	13.49
24	600	915	76.2	702	610	175	749	11.13	812.8	692.15	11.13	16.66

ASME B16.5 Weld Neck RTJ Flange ( Class 600 ) - Dimensions & Weight

Size in Inch	Size in mm	Outer Dia.	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	RTJ RF Dia	RTJ RF Height	PCD	RTJ Pitch dia	RTJ Depth	RTJ Width	Bore
		A	B	C	D	E	F	G	H	I	J	K	L
1/2	15	95	14.3	38	21.3	52	51	5.54	66.7	34.14	5.54	7.14	Welding Neck bore is derived from the pipe schedule
3/4	20	115	15.9	48	26.7	57	63.5	6.35	82.6	42.88	6.35	8.74
1	25	125	17.5	54	33.4	62	70	6.35	88.9	50.8	6.35	8.74
1 1/4	32	135	20.7	64	42.2	67	79.5	6.35	98.4	60.33	6.35	8.74
1 1/2	40	155	22.3	70	48.3	70	90.5	6.35	114.3	68.27	6.35	8.74
2	50	165	25.4	84	60.3	73	108	7.92	127	82.55	7.92	11.91
2 1/2	65	190	28.6	100	73	79	127	7.92	149.2	101.6	7.92	11.91
3	80	210	31.8	117	88.9	83	146	7.92	168.3	123.83	7.92	11.91
3 1/2	90	230	35	133	101.6	86	159	7.92	184.2	131.78	7.92	11.91
4	100	275	38.1	152	114.3	102	175	7.92	215.9	149.23	7.92	11.91
5	125	330	44.5	189	141.3	114	210	7.92	266.7	180.98	7.92	11.91
6	150	355	47.7	222	168.3	117	241	7.92	292.1	211.12	7.92	11.91
8	200	420	55.6	273	219.1	133	302	7.92	349.2	269.88	7.92	11.91
10	250	510	63.5	343	273	152	356	7.92	431.8	323.85	7.92	11.91
12	300	560	66.7	400	323.8	156	413	7.92	489	381	7.92	11.91
14	350	605	69.9	432	355.6	165	457	7.92	527	419.1	7.92	11.91
16	400	685	76.2	495	406.4	178	508	7.92	603.2	469.9	7.92	11.91
18	450	745	82.6	546	457	184	575	7.92	654	533.4	7.92	11.91
20	500	815	88.9	610	508	190	635	9.53	723.9	584.2	9.53	13.49
24	600	940	101.6	718	610	203	749	11.13	838.2	692.15	11.13	16.66

ASME B16.5 Weld Neck RTJ Flange ( Class 900 ) - Dimensions & Weight

Size in Inch	Size in mm	Outer Dia.	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	RTJ RF Dia	RTJ RF Height	PCD	RTJ Pitch dia	RTJ Depth	RTJ Width	Bore
		A	B	C	D	E	F	G	H	I	J	K	L
1/2	15	120	22.3	38	21.3	60	60.5	6.35	82.6	39.67	6.35	8.74	Welding Neck bore is derived from the pipe schedule
3/4	20	130	25.4	44	26.7	70	66.5	6.35	88.9	44.45	6.35	8.74
1	25	150	28.6	52	33.4	73	71.5	6.35	101.6	50.8	6.35	8.74
1 1/4	32	160	28.6	64	42.2	73	81	6.35	111.1	60.33	6.35	8.74
1 1/2	40	180	31.8	70	48.3	83	92	6.35	123.8	68.27	6.35	8.74
2	50	215	38.1	105	60.3	102	124	7.92	165.1	95.25	7.92	11.91
2 1/2	65	245	41.3	124	73	105	137	7.92	190.5	107.95	7.92	11.91
3	80	240	38.1	127	88.9	102	156	7.92	190.5	123.83	7.92	11.91
4	100	290	44.5	159	114.3	114	181	7.92	235	149.23	7.92	11.91
5	125	350	50.8	190	141.3	127	216	7.92	279.4	180.98	7.92	11.91
6	150	380	55.6	235	168.3	140	241	7.92	317.5	211.12	7.92	11.91
8	200	470	63.5	298	219.1	162	308	7.92	393.7	269.88	7.92	11.91
10	250	545	69.9	368	273	184	362	7.92	469.9	323.85	7.92	11.91
12	300	610	79.4	419	323.8	200	419	7.92	533.4	381	7.92	11.91
14	350	640	85.8	451	355.6	213	467	11.13	558.8	419.1	11.13	16.66
16	400	705	88.9	508	406.4	216	524	11.13	616	469.9	11.13	16.66
18	450	785	101.6	565	457	229	594	12.7	685.8	533.4	12.7	19.84
20	500	855	108	622	508	248	648	12.7	749.3	584.2	12.7	19.84
24	600	1040	139.7	749	610	292	772	15.88	901.7	692.15	15.88	26.97

ASME B16.5 Weld Neck RTJ Flange ( Class 1500 ) - Dimensions & Weight

Size in Inch	Size in mm	Outer Dia.	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	RTJ RF Dia	RTJ RF Height	PCD	RTJ Pitch dia	RTJ Depth	RTJ Width	Bore
		A	B	C	D	E	F	G	H	I	J	K	L
1/2	15	120	22.3	38	21.3	60	60.5	6.35	82.6	39.67	6.35	8.74	Welding Neck bore is derived from the pipe schedule
3/4	20	130	25.4	44	26.7	70	66.5	6.35	88.9	44.45	6.35	8.74
1	25	150	28.6	52	33.4	73	71.5	6.35	101.6	50.8	6.35	8.74
1 1/4	32	160	28.6	64	42.2	73	81	6.35	111.1	60.33	6.35	8.74
1 1/2	40	180	31.8	70	48.3	83	92	6.35	123.8	68.27	6.35	8.74
2	50	215	38.1	105	60.3	102	124	7.92	165.1	95.25	7.92	11.91
2 1/2	65	245	41.3	124	73	105	137	7.92	190.5	107.95	7.92	11.91
3	80	265	47.7	133	88.9	117	168	7.92	203.2	136.53	7.92	11.91
4	100	310	54	162	114.3	124	194	7.92	241.3	161.93	7.92	11.91
5	125	375	73.1	197	141.3	156	229	7.92	292.1	193.68	7.92	11.91
6	150	395	82.6	229	168.3	171	248	9.53	317.5	211.14	9.53	13.49
8	200	485	92.1	292	219.1	213	318	11.13	393.7	269.88	11.13	16.66
10	250	585	108	368	273	254	371	11.13	482.6	323.85	11.13	16.66
12	300	675	123.9	451	323.8	283	438	14.27	571.5	381	14.27	23.01
14	350	750	133.4	495	355.6	298	489	15.88	635	419.1	15.88	26.97
16	400	825	146.1	552	406.4	311	546	17.48	704.8	469.9	17.48	30.18
18	450	915	162	597	457	327	613	17.48	774.7	533.4	17.48	30.18
20	500	985	177.8	641	508	356	673	17.48	831.8	584.2	17.48	33.32
24	600	1170	203.2	762	610	406	794	20.62	990.6	692.15	20.62	36.53

ASME B16.5 Weld Neck RTJ Flange ( Class 2500 ) - Dimensions & Weight

Size in Inch	Size in mm	Outer Dia.	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	RTJ RF Dia	RTJ RF Height	PCD	RTJ Pitch dia	RTJ Depth	RTJ Width	Bore
		A	B	C	D	E	F	G	H	I	J	K	L
1/2	15	135	30.2	43	21.3	73	65	6.35	88.9	42.88	6.35	8.74	Welding Neck bore is derived from the pipe schedule
3/4	20	140	31.8	51	26.7	79	73	6.35	95.2	50.8	6.35	8.74
1	25	160	35	57	33.4	89	82.5	6.35	108	60.33	6.35	8.74
1 1/4	32	185	38.1	73	42.2	95	102	7.92	130.2	72.23	7.92	11.91
1 1/2	40	205	44.5	79	48.3	111	114	7.92	146	82.55	7.92	11.91
2	50	235	50.9	95	60.3	127	133	7.92	171.4	101.6	7.92	11.91
2 1/2	65	265	57.2	114	73	143	149	9.53	196.8	111.13	9.52	13.49
3	80	305	66.7	133	88.9	168	168	9.53	228.6	127	9.52	13.49
4	100	355	76.2	165	114.3	190	203	11.13	273	157.18	11.13	16.66
5	125	420	92.1	203	141.3	229	241	12.7	323.8	190.5	12.7	19.84
6	150	485	108	235	168.3	273	279	12.7	368.3	228.6	12.7	19.84
8	200	550	127	305	219.1	318	340	14.27	438.2	279.4	14.27	23.01
10	250	675	165.1	375	273	419	425	17.48	539.8	342.9	17.48	30.18
12	300	760	184.2	441	323.8	464	495	17.48	619.1	406.4	17.48	33.32

Ring Type Joint Flange Standards

Ring Type Joint (RTJ) flanges are designed according to several recognized international standards. Here are some of the key standards for RTJ flanges:

ASME/ANSI Standards (American):
- ASME B16.5 – Pipe Flanges and Flanged Fittings (NPS 1/2" to 24").
- ASME B16.47 – Large Diameter Steel Flanges (Series A & B, NPS 26" to 60").
- ASME B16.36 – Orifice Flanges.
- ASME B16.48 – Line Blanks (Spectacle, Spade, and Spacer Flanges).
- ANSI B16.1 – Cast Iron Flanges and Flanged Fittings.
- ANSI B16.42 – Ductile Iron Pipe Flanges and Flanged Fittings.
ISO Standards (International)
- ISO 7005-1 – Steel Flanges for General Applications.
- ISO 7005-2 – Cast Iron Flanges.
- ISO 7005-3 – Copper Alloy Flanges.
EN Standards (European)
- EN 1092-1 – Steel Flanges.
- EN 1092-2 – Cast Iron Flanges.
- EN 1092-3 – Copper Alloy Flanges.
- EN 1092-4 – Aluminium Alloy Flanges.
DIN Standards (German)
- DIN 2527 – Blind Flanges.
- DIN 2576 – Slip-On Flanges (PN 10).
- DIN 2633 – Weld Neck Flanges (PN 16).
- DIN 2634 – Weld Neck Flanges (PN 25).
- DIN 2635 – Weld Neck Flanges (PN 40).
JIS Standards (Japanese)
- JIS B2220 – Steel Pipe Flanges.
GOST Standards (Russian)
- GOST 12820 – Flat Flanges for Steel Pipe Joints.
- GOST 12821 – Steel Welded Flanges for High-Pressure Applications.
- GOST 33259 – Flange Connections for Industrial Equipment and Pipelines.
BS Standards (British)
- BS 4504 – Circular Flanges for Pipes, Valves, and Fittings.
- BS 10 – Specification for Flanges and Bolting.
API Standards (Oil & Gas)
- API 6A – Wellhead and Christmas Tree Equipment Flanges.
- API 605 – Large-Diameter Carbon Steel Flanges (merged into ASME B16.47 Series B).
AWWA Standards (Waterworks)
- AWWA C207 – Steel Ring Flanges for Waterworks Service.
MSS Standards (Manufacturer's Standardization Society)
- MSS SP-44 – Steel Pipe Flanges (merged into ASME B16.47 Series A).
- MSS SP-51 – Flanges for Glass-Lined Equipment.
Material-Specific Standards (ASTM)
- ASTM A105 – Carbon Steel Forged Flanges.
- ASTM A182 – Alloy and Stainless Steel Forged Flanges.
- ASTM A350 – Carbon and Low-Alloy Steel Flanges for Low-Temperature Service.
- ASTM A694 – High-Strength Carbon and Alloy Steel Flanges for High-Pressure Applications.
Other Regional and Specialized Standards
- KS B1511 – Korean Standard Flanges.
- NF E29-206 – French Standard Flanges.
- SANS 1123 – South African Standard for Steel Flanges.

Why Ample Alloys For RTJ Flanges!

Ample Alloys are often preferred for Ring Type Joint (RTJ) flanges due to several reasons related to their material properties and suitability for demanding applications. Here’s why Ample Alloys are commonly used for RTJ flanges:

Strength and Durability

They can withstand high pressures and temperatures commonly encountered in industrial applications.

Fatigue Resistance

Ample Alloys can endure cyclic loads and vibrations, making them suitable for dynamic systems.

Compatibility with Standards

They comply with industry standards like ASME, API, and DIN, ensuring reliable performance.

Temperature Stability

Ample Alloys maintain structural integrity at both high and low temperatures, which is vital for high-temperature applications.

What types of RTJ gaskets are used?

RTJ flanges commonly use oval, octagonal, or spiral wound gaskets, which fit into the grooves of the flanges for a tight seal under high pressure and temperature.

How do RTJ flanges work?

The flange faces have grooves that house a gasket. When the flange bolts are tightened, the gasket is compressed, creating a secure and leak-tight seal between the flange faces, even under extreme pressure conditions.

How are RTJ flanges different from flat face or raised face flanges?

RTJ flanges differ in their sealing mechanism. Unlike flat face or raised face flanges, which use non-metallic gaskets, RTJ flanges rely on a metallic ring gasket that fits into a groove, providing a more robust seal for high-pressure and high-temperature environments.