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A stainless steel flange is a type of pipe fitting that is used to connect pipes, valves, pumps, and other equipment together. It is made of a durable and corrosion-resistant alloy of steel that contains chromium and other metals. Stainless steel flanges are designed to withstand extreme temperatures, pressures, and chemical exposure, making them ideal for use in industrial and commercial settings. They come in different shapes, sizes, en typen, including weld-neck, slip-on, threaded, socket weld, and blind flanges. Stainless steel flanges are commonly used in the oil and gas, chemisch, food and beverage, and pharmaceutical industries, among others.

A flange is a ring of steel (forged, cut from plate, or rolled) designed to connect sections of pipe, or to join pipe to a pressure vessel, valve, pump or other integral flanged assembly.

Flanges are joined to each other by bolting, and are joined to the piping system by welding or threading

(or loose when stub ends are used).

The basic types of flanges are:

Slip-on Flange

Blind Flange

Weld neck Flange

Threaded Flange

Socket weld Flange

Lap joint Flange

Orifice Flange

stainless steel flange drawing

ASME SA182 Stainless Steel Flanges Specification, Maat, Grades, Standards:

Stainless Steel Flanges	Specifications
Flanges Types	Slip-On, Weld Neck, Long Weld Neck, Threaded, Blind, Companion, Lap Joint
Class	150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS ASA 150, ASA 300, PN 6,10,16,25, 40,64,100,160 ETC. available with NACE MR 01-75
Maat	1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Type	Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Lap-Joint Face (LJF), Large Male-Female (LMF), Small Male-Female (SMF), Large Tongue & Groove, Small Tongue, Groove
Grades
Roestvrij staal	ASTM / ASME 201, 202, 301, 304, 304L, 310, 310S, 316L, 316TI, 317, 317L, 321, 347, 409, 409M, 409L, 410, 410S, 420, 430, 431, 441, 444, 446, 17.4PH, 904L

Class 150 Roestvrij staal Flange Dimensions and Weight in KG

NOMINAL SIZE		DIMENSIONS		WEIGHT (KG)
NPS (Inches)	DN (mm)	FLANGE MM	FLANGE THICKNESS	SOW SW	WN	BLIND
1/2	15	88.9	11.2	0.4	0.5	0.4
3/4	20	98.6	12.7	0.6	0.7	0.6
1	25	108	14.2	0.8	1	0.9
1 1/4	32	117.3	15.7	1	1.3	1.2
1 1/2	40	127	17.5	1.3	1.7	1.5
2	50	152.4	19.1	2.1	2.6	2.4
2 1/2	65	177.8	22.4	3.3	4.1	3.9
3	80	190.5	23.9	3.9	4.9	4.9
3 1/2	90	215.9	23.9	4.8	6.1	6.2
4	100	228.6	23.9	5.3	6.8	7.0
5	125	254	23.9	6.1	8.6	8.6
6	150	279.4	25.4	7.5	10.6	11.3
8	200	342.9	28.4	12.1	17.6	19.6
10	250	406.4	30.2	16.5	24	28.6
12	300	482.6	31.8	26.2	36.5	43.2
14	350	533.4	35.1	34.6	48.4	58.1
16	400	596.9	36.6	44.8	60.6	76.1
18	450	635	39.6	48.9	68.3	93.7
20	500	698.5	42.9	61.9	84.5	122.0
24	600	812.8	47.8	86.9	115	185.0

Class 300 Roestvrij staal Flange Dimensions and Weight in KG

NOMINAL SIZE		DIMENSIONS		WEIGHT (KG)
NPS (Inches)	DN (mm)	FLANGE VAN A MM	FLANGE THICKNESS D MM	SOW SW	WN	BLIND
1/2	15	95.3	14.2	0.6	0.8	0.6
3/4	20	117.3	15.7	1.1	1.3	1.1
1	25	124	17.5	1.4	1.5	1.4
1 1/4	32	133.4	19.1	1.7	2.0	1.8
1 1/2	40	155.5	20.6	2.5	2.9	2.7
2	50	165.1	22.4	2.9	3.4	3.2
2 1/2	65	190.5	25.4	4.3	5.2	4.9
3	80	215.9	28.4	5.9	6.9	6.8
3 1/2	90	228.6	30.2	7.3	8.7	8.7
4	100	254	31.8	9.6	11.2	11.5
5	125	279.4	35.1	12.3	15.1	15.6
6	150	317.5	36.6	15.6	19.1	20.9
8	200	381	41.1	24.2	29.9	34.3
10	250	444.5	47.6	34.1	42.7	53.3
12	300	520.7	50.8	49.8	61.8	78.8
14	350	584.2	53.8	69.9	85.8	105.0
16	400	647.7	57.2	88.1	106.0	137.0
18	450	711.2	60.5	109.0	131.0	175.0
20	500	774.7	63.5	134.0	158.0	221.0
24	600	914.4	70.0	201.0	230.0	339.0

Class 600 SS Flange Dimensions and Weight in KG

NOMINAL SIZE		DIMENSIONS		WEIGHT (KG)
NPS (Inches)	DN (mm)	FLANGE VAN A MM	FLANGE THICKNESS D MM	SOW SW	WN	BLIND
1/2	15	95.3	14.2	0.7	0.9	0.8
3/4	20	117.3	15.7	1.3	1.5	1.3
1	25	124.0	17.5	1.5	1.8	1.6
1 1/4	32	133.4	20.6	2	2.5	2.2
1 1/2	40	155.4	22.4	3	3.5	3.3
2	50	165.1	25.4	3.6	4.4	4.2
2 1/2	65	190.5	28.4	5.3	6.4	6.1
3	80	209.6	31.8	7	8.5	8.4
3 1/2	90	228.6	35.1	8.8	10.7	11
4	100	273.1	38.1	14.5	17.4	17.3
5	125	330.2	44.5	24.4	29.2	29.4
6	150	355.6	47.8	28.7	34.9	36.1
8	200	419.1	55.6	43.4	53.9	58.9
10	250	508	63.5	70.3	86.5	97.5
12	300	558.8	66.5	84.2	103.0	124
14	350	603.3	69.9	98.7	122.0	151
16	400	685.8	76.2	142.0	170.0	214
18	450	743	82.6	173.0	204.0	272
20	500	812.8	88.9	220.0	254.0	349.0
24	600	939.8	101.6	312.0	358.0	533.0

Class 900 Roestvrij staal Flange Dimensions and Weight in KG

NOMINAL SIZE		DIMENSIONS		WEIGHT (KG)
NPS (Inches)	DN (mm)	FLANGE VAN A MM	FLANGE THICKNESS D MM	SOW SW	WN	BLIND
1/2	15	120.7	22.4	1.8	1.9	1.8
3/4	20	130	25.4	2.4	2.6	2.4
1	25	149.4	28.4	3.6	3.7	3.6
1 1/4	32	158.8	28.4	4	4.3	4.1
1 1/2	40	177.8	31.8	5.5	5.9	5.8
2	50	215.9	38.1	10.2	10.8	10
2 1/2	65	244.3	41.1	13.9	15	14
3	80	241.3	38.1	11.6	13.7	13.1
4	100	292.1	44.5	19.7	22.5	26.9
5	125	349.3	50.8	31.9	37.4	36.5
6	150	381	55.6	41.1	47.7	47.4
8	200	469.9	63.5	70.7	81.3	82.5
10	250	546.1	69.9	101.0	119	122.0
12	300	609.6	79.2	133.0	157.0	173.0
14	350	641.4	85.6	153.0	180.0	206.0
16	400	704.9	88.9	185.0	217.0	259.0
18	450	787.4	101.6	258.0	292.0	367.0
20	500	857.3	108.0	317.0	362.0	463.0
24	600	1041.4	139.7	606.0	665.0	876.0

Class 1500 Roestvrij staal Flange Dimensions and Weight in KG

NOMINAL SIZE		DIMENSIONS		WEIGHT (KG)
NPS (Inches)	DN (mm)	FLANGE VAN A MM	FLANGE THICKNESS D MM	SOW SW	WN	BLIND
1/2	15	120.7	22.4	1.8	1.9	1.8
3/4	20	130	25.4	2.4	2.6	2.4
1	25	149.4	28.4	3.6	3.7	3.6
1 1/4	32	158.8	28.4	4	4.3	4.1
1 1/2	40	177.8	31.8	5.5	5.9	5.8
2	50	215.9	38.1	10.2	10.8	10.1
2 1/2	65	244.3	41.1	13.9	15	14
3	80	266.7	47.8		19.9	19.1
4	100	311.2	53.8		29.9	29.9
5	125	374.7	73.2		55.4	58.4
6	150	393.7	82.6		68.4	71.8
8	200	482.6	91.9		117	122
10	250	584.2	108		194.0	210.0
12	300	673.1	124		288.0	316.0
14	350	749.3	133.4		380.0	420
16	400	825.5	146.1		485.0	558.0
18	450	914.4	162.1		644.0	760.0
20	500	984.3	177.8		775.0	965.0
24	600	1168.4	203.2		1232.0	1558.0

Class 2500 SS Flange Dimensions and Weight in KG

NOMINAL SIZE		DIMENSIONS		WEIGHT (KG)
NPS (Inches)	DN (mm)	FLANGE VAN A MM	FLANGE THICKNESS D MM	WN	BLIND
1/2	15	133.4	30.2	3.1	3.0
3/4	20	139.7	31.8	3.7	3.5
1	25	158.8	35.1	5.2	5.0
1 1/4	32	184.2	38.1	7.7	7.4
1 1/2	40	203.2	44.5	10.9	10.4
2	50	235	50.8	16.2	15.6
2 1/2	65	266.7	57.2	23.7	22.6
3	80	304.8	66.5	36.2	34.8
4	100	355.6	76.2	55.3	53.9
5	125	419.1	91.9	92.5	90.8
6	150	482.6	108	143.0	141
8	200	552.5	127	215.0	214
10	250	673.1	165.1	406.0	411.0
12	300	762	184.2	572.0	592.0

Stainless Steel Flanges Price List

SS Pipe Flange Price List	Stainless Steel Screwed Flanges Per Unit (USD)	SS ASTM A182 Flange (Uae Dirham)	SS Flange Material (Saudi Riyal)
Flanges Ss A 182 Gr F304/304l Flange Wn 150 Rf 304/304l Ss Ios Bore Item Flange-Weld Neck-Asme Class(5pcs)	25	16.69	17.05
Ss Seamless Butt-Welded Flange / Fittings (Pipe Fittings) Grade 904l	200	69.05	70.53
Flanges Ss A 182 Gr F316/316 Flange Wn 150 Rf 304/304l Ss Ios Bore Item Flange-Weld Neck-Asme Class(50pcs)	112	19.90	20.32
Flange Ss Gr Sa182 F321 Ansi B16.5 Dn 20, 300#Sch 40s, Weld Neck Rf (10pcs)	95	24.60	25.13
Flanges Ss A 182 Gr F310/304l Flange Wn 150 Rf 20b462 40/S Bore Item Flange-Type-Weld Neck (5pcs)	102	41.92	42.81
Flange Ss Gr Sa182 F316 Ansi B16.5 Dn25,150#Sch10s, Weld Neck Rf (62pcs)	86	25.17	25.71

ASTM A182 Stainless Steel Flanges Chemical Composition

Stainless Steel Flanges Materials Composition, %
ASTM A182 GRADE	C	Mn	P	S	Si	Ni	Cr	Mo	Nb	Van	Others
F304(1)	0.08	2.0	0.045	0.030	1.0	8.0-11.0	18.0-20.0
F304H	0.04-0.10	2.0	0.045	0.030	1.0	8.0-11.0	18.0-20.0
F304L(1)	0.030	2.0	0.045	0.030	1.0	8.0-13.0	18.0-20.0
F304N(2)	0.08	2.0	0.045	0.030	1.0	8.0-10.5	18.0-20.0
F304LN(2)	0.030	2.0	0.045	0.030	1.0	8.0-10.5	18.0-20.0
F309H	0.04-0.10	2.0	0.045	0.030	1.0	12.0-15.0	22.0-24.0
F310	0.25	2.0	0.045	0.030	1.0	19.0-22.0	24.0-26.0
F310H	0.04-0.10	2.0	0.045	0.030	1.0	19.0-22.0	24.0-26.0
F310MoLN	0.030	2.0	0.030	0.015	0.40	21.0-23.0	24.0-26.0	2.0-3.0			N 0.10-0.16
F316	0.08	2.0	0.045	0.030	1.0	10.0-14.0	16.0-18.0	2.0-3.0
F316H	0.04-0.10	2.0	0.045	0.030	1.0	10.0-14.0	16.0-18.0	2.0-3.0
F316L(1)	0.030	2.0	0.045	0.030	1.0	10.0-15.0	16.0-18.0	2.0-3.0
F316N(2)	0.08	2.0	0.045	0.030	1.0	11.0-14.0	16.0-18.0	2.0-3.0
F316LN(2)	0.030	2.0	0.045	0.030	1.0	11.0-14.0	16.0-18.0	2.0-3.0
F316Ti	0.08	2.0	0.045	0.030	1.0	10.0-14.0	16.0-18.0	2.0-3.0		(3)	N 0.10 max
F317	0.08	2.0	0.045	0.030	1.0	11.0-15.0	18.0-20.0	3.0-4.0
F317L	0.030	2.0	0.045	0.030	1.0	11.0-15.0	18.0-20.0	3.0-4.0
F321	0.08	2.0	0.045	0.030	1.0	9.0-12.0	17.0-19.0			(4)
F321H	0.04-0.10	2.0	0.045	0.030	1.0	9.0-12.0	17.0-19.0			(5)
F347	0.08	2.0	0.045	0.030	1.0	9.0-13.0	17.0-20.0		(6)
F347H	0.04-0.10	2.0	0.045	0.030	1.0	9.0-13.0	17.0-20.0		(7)
F348	0.08	2.0	0.045	0.030	1.0	9.0-13.0	17.0-20.0		(6)		Co 0.20 Ta 0.10
F348H	0.04-0.10	2.0	0.045	0.030	1.0	9.0-13.0	17.0-20.0		(7)		Co 0.20 Ta 0.10

ASTM A182 SS Flanges Mechanical Properties

ASTM A182 Grade	Minimum Tensile Strength in MPa	Minimum Yield point in Mpa	Minimum Elongation in %	Minimum Reduction of in min, %
ASTM A182 F304	515	205	30	50
ASTM A182 F304L	485	170	30	50
ASTM A182 F316	515	205	30	50
ASTM A182 F316L	485	170	30	50
ASTM A182 F321	515	205	30	50

RVS flens/

Stainless steel flange

ASME SA182 Stainless Steel Flanges Specification, Maat, Grades, Standards:

Class 150 Roestvrij staal Flange Dimensions and Weight in KG

Class 300 Roestvrij staal Flange Dimensions and Weight in KG

Class 600 SS Flange Dimensions and Weight in KG

Class 900 Roestvrij staal Flange Dimensions and Weight in KG

Class 1500 Roestvrij staal Flange Dimensions and Weight in KG

NOMINAL SIZE

DIMENSIONS

WEIGHT (KG)

NPS (Inches)

DN (mm)

FLANGE VAN A MM

FLANGE THICKNESS D MM

SOW SW

WN

BLIND

1/2

15

120.7

22.4

1.8

1.9

1.8

3/4

20

130

25.4

2.4

2.6

2.4

1

25

149.4

28.4

3.6

3.7

3.6

1 1/4

32

158.8

28.4

4

4.3

4.1

1 1/2

40

177.8

31.8

5.5

5.9

5.8

2

50

215.9

38.1

10.2

10.8

10.1

2 1/2

65

244.3

41.1

13.9

15

14

3

80

266.7

47.8

19.9

19.1

4

100

311.2

53.8

29.9

29.9

5

NPS
(Inches)

FLANGE
VAN
A
MM

FLANGE
THICKNESS
D
MM

SOW
SW