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Flanges

We are a renowned name in manufacturing of pipe flanges, forged pipe flanges. We use latest technology and comprehensive quality control systems in manufacturing our products so that our customers get exactly what they want on customised requests.

ANSI Standard Flanges | DIN Standard Flanges | JIS Stadard Flanges | BS Standard Flanges

Summary of material used for flanges
MATERIAL	ASME/ANSI B16.5	ASME B16.47 SERIES A (MSS SP-441	ASME B16.47 SERIES B (or API 6052)	BS 4504	BS 3293	BS 10³
Forging(ASTM A182)	-	-	-	-	-	-
Plate (ASTM A240)⁴	-	-	-	-	-	-
Bar⁵	-	-	-	-	-	-
Casting⁶	-	-	-	-	-	-

Note :

MSS SP-44 flanges are designated series A flanges in ASME B16.47.
API 605 has been cancelled. API 605 flanges are designated series B flanges in ASME B16.47.
BS 10, although obsolete, remains in use for light weight economy stainless steel flanges.
Within specification ANSI B16.5, plate can only be used to provide blind flanges.
Most small BS 10 flanges are made from bar.
Castings are not included in this manual.

Materials:
Most standard specify the material from which the flanges is produced. The purchaser should specify the exact requirements.

Flange Size:
All sizes and grades compatible to standard pipe flanges and wall thicknesses (pressure ratings) are available. The table bellow provides a summary.

Flange Face:
There are various face configurations for flanges. Typically: flat face, raised face, tongue and groove, and ring joint.

Face Finish:
The finish on the face of a flange is measured as an Arithmetical Average Roughness Height (AARH). The finish is determined by the standard used. For example, ANSI B16.5 specifies face finishes within a range 125AARH - 500AARH (3.2 Ra to 12.5 Ra). Other finishes are available on request, for example 1.6 Ra Max. 1.6/3.2 Ra, 3.2/6.3 Ra or 6.3/12.5 Ra. The range 3.2/6.3 is most common.

Summary of flanges size specified by common standards
FLANGE TYPE	ASME/ANSI B16.5	ASME B16.47 Series A (or MSS SP-441)	ASME B16.47 Series B (or API 6052)	BS 4504 (ISO 7005-1)	BS 3293
	Nominal Pipe Sizes
	Class (lb)	Class (lb)	Class (lb)	PN (bar)	Class (lb)
Weld Neck	150 - 2500	150 - 900	75 - 900	2.5 - 40	150 - 600
Slip-on	150 - 2500	-	-	2.5 - 40	150 - 600
Blind	150 - 2500	300 - 900	300-900	2.5 - 40	-
Lap Joint	150 - 2500	-	-	2.5 - 40	-
Socket Weld	150 - 2500	-	-	N/A	-
Threaded	150 - 2500	-	-	6 - 40	-
Flat/Raise Facings	As above	As above	As above	As above	As above
Ring Joint Facings	150 - 2500	300 - 900	300 - 900	2.5 - 40	300 - 600
Other Facings	150 - 2500	-	-	2.5 - 40	-

Note :

MSS SP-44 flanges are designated series A flanges in ASME B16.47. It also covers flanges in the range NPS 12 to 24, these being equivalent to ASME /ANSI B16.5 flanges in the same range (except for the addition of NPS 22 in MSS SP-44).
API 605 has been cancelled. API 605 flanges are designated series B flanges in ASME B16.47. Ranges quoted are based on ASME B16.47 series B.
Dimension not covered in this summary.

ANSI Standard Flanges

Size :

1/2" TO 16"

Type :

WNRF, SORF, BLRF, Threaded etc

Dimension :

ASME B 16.5

Material :

SS304, SS304L, SS316, SS316L, SS316Ti, SS321

Pressure Rating :

150#, 300#, 600#, 900#, 1500#, 2500# Class

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DIN Standard Flanges

Description	Rated Pressure / Presión Nominal / Nenndruck (in bar) (1 bar = 14.5 psi)
	1	2.5	6	10	16	25	40	64	100	160	250	320	400
	DIN
Blind Flanges			2527	2527	2527	2527	2527	2527	2527
Slipon Flanges			2573	2576
Welding neck flanges	2630	2630	2631	2632	2633	2634	2635	2636	2637	2638	2628	2629	2627
Threaded flanges with neck			2565	2566	2566	2567	2567	2568	2569
Material :-	1.4301, 1.4306, 1.4401, 1.4404, 1.4571, 1.4841, 1.4541

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JIS Stadard Flanges

JIS STANDARD, MATERIAL : SUS 304 & 316 MADE BY SAND CASTING OR FORGED THREAD CONFORM TO BS21, 1973 TAPER THREAD.
Unit : mm
DIM.\N.P.S.		15	20	25	32	40	50	65	80	100	125	150	200	250
A	5K	80	85	95	115	120	130	155	180	200	235	265	320	385
1
0	10K	95	100	125	135	140	155	175	185	210	250	280	330	400
B	5K	30	36	45	54	60	76	94	108	134	164	196	244	288
1.5
0	10K	30	36	45	54	60	76	94	108	134	164	196	244	288
C	5K	60	65	75	90	95	105	130	145	165	200	230	280	345
0.5	10K	70	75	90	100	105	120	140	150	175	210	240	290	355
D	5K	9	10	10	12	12	14	14	14	16	16	18	20	22
2
0	10K	12	14	14	16	16	16	18	18	18	20	22	22	24
E	5K	22.2	27.7	34.5	43.2	49.1	61.1	77.1	90	115.4	141.2	166.6	218	269.5
1
0	10K	22.2	27.7	34.5	43.2	49.1	61.1	77.1	90	115.4	141.2	166.6	218	269.5
F	5K	1	1	1	2	2	2	2	2	2	2	2	2	2
0.2	10K	1	1	1	2	2	2	2	2	2	2	2	2	2
R	5K	48	52	62	72	78	88	112	125	145	180	210	255	320
1	10K	52	58	70	80	85	100	120	130	155	185	215	265	325
N	5K	4	4	4	4	4	4	4	4	8	8	8	12	12
	10K	4	4	4	4	4	4	4	8	8	8	8	12	12
	5K	12	12	12	15	15	15	15	19	19	19	19	23	23
0.5
0	10K	15	15	19	19	19	19	19	19	19	23	23	23	23
Y	5K	16	18	18	21	21	22	26	30	35	35	38	40	44
1.5	10K	16	18	18	21	21	22	26	30	35	35	38	40	44

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BS Standard Flanges

Size :

10 NB to 400 NB

Type :

Slipon, Weldneck, Blind etc

Dimension :

BS4504, BS 10 T - D, E, F etc.

Material :

SS304, SS304L, SS316, SS316L, SS316Ti, SS321

Pressure Rating :

PN5, PN10, PN16, etc.

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Our Product Range

Tube Fittings	Elbow Fittings \| Straight Fittings \| Tee Fittings \| Union Fittings
Valve Fittings	Ball Valves \| Needle Valves \| 2 Way Manifold Valves \| 3 Way Manifold Valves \| 5 Way Manifold Valves
Flanges	ANSI Standard Flanges \| BS Standard Flanges \| DIN Standard Flanges \| JIS Stadard Flanges
Syphon Tube \| Condensate POT / Seal POT
We Are Stockist of	Pipes and Tubes \| Forged Fittings \| Butt-Weld Fittings \| Fasteners \| Round Bars \| Plates / Sheets

Tube Fittings	Elbow Fittings \| Straight Fittings \| Tee Fittings \| Union Fittings
Valve Fittings	Ball Valves \| Needle Valves \| 2 Way Manifold Valves \| 3 Way Manifold Valves \| 5 Way Manifold Valves
Flanges	ANSI Standard Flanges \| BS Standard Flanges \| DIN Standard Flanges \| JIS Stadard Flanges
Syphon Tube \| Condensate POT / Seal POT
We Are Stockist of	Pipes and Tubes \| Forged Fittings \| Butt-Weld Fittings \| Fasteners \| Round Bars \| Plates / Sheets