Stainless Steel 304 Flanges and ASTM A182 F304 Slip On/ Blind Flange

What is Stainless Steel 304 Flanges?

Stainless Steel 304 Flanges are an austenitic grade of components. These flanges have a chemical composition of 18% chromium and 8% nickel making them highly corrosion resistant in a range of environments. The flanges in the 304 range exhibit excellent forming properties and ensure a leak-proof sealing across the piping system. These flanges are designed to withstand high pressures and temperatures while managing to transport high volumes of fluids and gases.

Comparision A182 F304 SORF Flange and SS 304 WNRF Flange

The SORF and WNFR flanges are the two most popular flanges. These flanges have distinct characteristics, which differentiate them from each other.

SS 304 WNRF flanges are designed with a long protruding hub or head. SORF flanges are designed with a low-profile head.
A182 F304 SORF Flange is utilized for low pressure and temperature systems. The SS304 WNRF flange is a flange of choice in high pressure and temperature systems.
WNFR flanges are directly butt welded on the piping component. The SORF flange is slid on the component and welded using one or two filler welds.
SORF flanges are comparatively cheaper compared to standard WNFR flanges.

SS 304 Flanges Oil and Gas Application

Oil and gas systems emit corrosive by-products during their processing and refining. The SS 304 flanges are designed with a superior chemical composition of chromium and nickel. The composition creates a barrier and protects the flange against corrosion and oxidation. These flanges are very reliable and can transport oil and gas at high temperatures and pressures. The flanges within this grade ensure a smooth seal on these components thereby, preventing any leakage or spills.

DIN 1.4301 Blind Flange vs UNS S30400 Plate Flanges

DIN 1.4301 Blind Flange are special components, which don’t have a boring center or a hub. These flanges are designed to seal piping ends or act as blockages. They are generally bolted and allow the user to perform inspections or checks. Blind flanges resist high pressures and temperatures and securely seal the system.
UNS S30400 Plate Flange is a circular disc that is welded directly to a pipe bent allowing it to be bolted to another pipe. These plates are not suitable for high-pressure systems.

304 stainless steel Threaded Pipe Flange Features

The threaded pipe flanges are one of the versatile flanges in the 304 grade. Some of its features include

Threaded interior allowing it to correspond to different piping components.
Excellent corrosion resistance
Strong and secure seal
No requirement of welding
Provided with flat or raised face
Good choice for small size pipes
Useful in applications where post-weld treatment is not possible
Economical and time-saving
A flange of choice in explosive applications.

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15mm- 1500mm Gost 08Х18Н10 Stainless Steel 304 Blind Flange Specification and SA 182 Gr F304 Socket Weld Flange supplier in India

SS 304 Flanges Specification

Specifications List	ASME SA182 / ASTM A182
Class / Pressure Rating	PN64 2500#, PN6, 600#, PN40, 150#, PN25, PN16, PN10, 1500#, 300#, 900#, etc.
Size in Inches	1/2 (15 Nominal Bore) to 48 (1200 Nominal Bore)
ASTM Standards	ASME/ANSI B16.48, B16.5, BS4504, B 16.47 Series B & A, EN-1092, BS 10, DIN
Manufacturer Of Top 8 Flanges Types	Lap Joint Flange/ RTJ Flange/ Threaded Flange/ Blind Flange/ Reducing Flange/Slip On Flange/ Weld Neck Flange/ Socket Weld Flange

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SS 304 Flange Weight Chart

Pipe Normal Diam.		O.D. Flange	Thk. Of Flange Min	Diam. of Hub	Diameter of Raised Face	Length Hub.Y	Thread Length	Diam. of Bolt Circle	Diam. of Bolt Holes	Number of Bolts	Diam. of Bolts (inch)	KG	LB
inch	dn	O	C	X	G	Y	T	BC	BH	BN	BD
1/2"	15	89.00	11.20	30.20	35.10	15.70	15.70	60.50	15.80	4	1/2"	0.4	0.9
3/4"	20	98.50	12.70	38.10	42.90	15.70	15.70	69.90	15.80	4	1/2"	0.7	1.5
1"	25	108.00	14.20	49.30	50.80	17.50	17.50	79.30	15.80	4	1/2"	0.8	1.8
1-1/4"	32	117.50	15.70	58.70	63.50	20.60	20.60	88.90	15.80	4	1/2"	1.2	2.6
1-1/2"	40	127.00	17.50	65.00	73.20	22.40	22.40	98.60	15.80	4	1/2"	1.5	3.3
2"	50	152.50	19.10	77.70	91.90	25.40	25.40	120.70	19.10	4	5/8"	2.3	5.1
2-1/2"	65	178.00	22.40	90.40	104.60	28.40	28.40	139.70	19.10	4	5/8"	3.7	8.1
3"	80	190.50	23.90	108.00	127.00	30.20	30.20	152.40	19.10	4	5/8"	4.1	9
3-1/2"	90	216.00	23.90	122.20	139.70	31.80	31.80	177.80	19.10	8	5/8"	5.1	11.2
4"	100	228.50	23.90	134.90	157.20	33.30	33.30	190.50	19.10	8	5/8"	5.9	13
5"	125	254.00	23.90	163.60	185.70	36.60	36.60	215.90	22.40	8	3/4"	7	15.4
6"	150	279.50	25.40	192.00	215.90	39.60	39.60	241.30	22.40	8	3/4"	8.4	18.5
8"	200	343.00	28.40	246.10	269.70	44.50	44.50	298.50	22.40	8	3/4"	13	28.6
10"	250	406.50	30.20	304.80	323.90	49.30	49.30	362.00	25.40	12	7/8"	18	39.5
12"	300	482.50	31.80	365.30	381.00	55.60	55.60	431.80	25.40	12	7/8"	29	64
14"	350	533.50	35.10	400.10	412.80	57.20	57.20	476.30	28.50	12	1"	39	86
16"	400	597.00	36.60	457.20	469.90	63.50	63.50	539.80	28.50	16	1"	47	103
18"	450	635.00	39.60	505.00	533.40	68.30	68.30	577.90	31.80	16	1 1/8"	57	126
20"	500	698.50	42.90	558.80	584.20	73.20	73.20	635.00	31.80	20	1 1/8"	76	167
24"	600	813.00	47.80	663.40	692.20	82.60	82.60	749.30	35.10	20	1 1/4"	97	214

SS 304 Flanges Chemical Composition

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	N
SS 304	0.08 max	2 max	0.75 max	0.045 max	0.030 max	18 – 20	-	8 – 11	-

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1.4301 Material Equivalent

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN
SS 304	1.4301	S30400	SUS 304	304S31	08Х18Н10	Z7CN18‐09	X5CrNi18-10

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SS 304 Flange Price List

Description	Per Unit (INR)
FLANGE , PIPE; WELD NECK, 1IN, SS ASTM A182, F304, 10S, CL 150, RF, ASME B 16.5	3,733
PN 10 FLANGES IN SS 304 SIZE: 1.1/2	811
FLANGE, PIPE; BLIND, 1IN , SS ASTM A182, 304, CL 150, RF, ASME B16.5	7,200
PN 10 FLANGES IN SS 304 SIZE: 1.1/4	760
1 FLANGE SS 304 PIPE	642
ASA 150#FLANGES IN SS 304 SIZE :1.1/2	608

A182 F304 Mechanical Properties

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
8.0 g/cm3	1400 °C (2550 °F)	Psi – 75000 , MPa – 515	Psi – 30000 , MPa – 205	35 %

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304 Stainless Steel Flange Pressure Rating

ASME /ANSI B16.34	PRESSURE RATING OF 304L Flange
Temp. °F	150#	300#	400#	600#	900#	1500#	2500#
750	95	415	555	830	1245	2075	3460
800	80	405	540	805	1210	2015	3360
850	65	395	530	790	1190	1980	3300
900	50	390	520	780	1165	1945	3240
1300	20	85	115	170	255	430	715
1350	20	60	80	125	185	310	515
1400	20	50	65	95	145	240	400
1450	15	35	45	70	105	170	285
1500	10	25	35	55	80	135	230
950	35	380	510	765	1145	1910	3180
1000	20	320	430	640	965	1605	2675
1050	20	310	410	615	925	1545	2570
1100	20	255	345	515	770	1285	2145
1150	20	200	265	400	595	995	1655
-20 to 100	275	720	960	1440	2160	3600	6000
200	230	600	800	1200	1800	3000	5000
300	205	540	720	1080	1620	2700	4500
400	190	495	660	995	1490	2485	4140
500	170	465	620	930	1395	2330	3880
600	140	435	580	875	1310	2185	3640
650	125	430	575	860	1290	2150	3580
700	110	425	565	850	1275	2125	3540
1200	20	155	205	310	465	770	1285
1250	20	115	150	225	340	565	945

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ASTM A182 F304 Properties

Gr.	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (m/m/0C)			Thermal Conductivity(W/m.K)		Specific Heat 0-1000C(J/kg.K)	Electrical Resistivity (n.m)
Gr.	Density (kg/m3)	Elastic Modulus (GPa)	0-1000C	0-3150C	0-5380C	at 1000C	at 5000C	Specific Heat 0-1000C(J/kg.K)	Electrical Resistivity (n.m)
A182 304	8000	193	17.2	17.8	18.4	16.2	21.5	500	720

304 SS Flanges For Sale

304 Stainless Steel Weld Neck Flange	ASTM A182 FStainless Steel 304 Threaded Flange
SA182 F304 SORF Flange	ASTM A182 F304 RTJ Flange
Stainless Steel F304 WNRF Flange	ASTM A182 Grade F304 SWRF Flange
ASTM A182 F304 Plate Flange	Stainless Steel ASTM A182 F304 Slip On Flange
ASTM A182 F304 Blind Flange	ASME SA182 F304 Weld Neck Flange

Types of Stainless Steel 304 Flanges

Stainless Steel 304 Flanges

SS 304 Flange

Stainless Steel 304 Weld Neck Flange

ASTM182 Uns S30400 Screwed Flanges

304 Stainless Steel Flanges

Flange 304

304 Flange

ASTM A182 F304 Flanges

ASTM A182 304 Lap Joint Flange

Flange SS304

Flange Sus 304

304 SS Flange

Stainless Steel 304 Threaded Flange

Stainless Steel 304 Blind Flange

Stainless Steel 304 Slip On Flange

AISI 304 Stainless Steel Flange

ASTM A182 F304

Flange Bs4504 Pn16 Plate Rf Stainless Steel 304

Stainless Steel 304 Pipe Flange

Stainless Steel 304 Forged Flange

Stainless Steel 304 Class 150lbs Lap Joint Pipe Flanges

ANSI B16.5 Class 150 6 Inch 304 Stainless Steel Pipe Flange Weld Neck Flange

SS 304 Welding Neck Orifice Flange

Stainless Steel 304 Socket Weld Flange

Stainless Steel 304 Weld Neck Flange Measurement

R For Diameter of raised face
Q For (Minimum) diameter of bolt circle
X For Hub Diameter at base
O For Outside Diameter of flange
C For Thickness of flange
Y For Length through hub
T For (Minimum) thread length

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Tolerance of Stainless Steel 304 Slip On Flange

Stainless Steel 304 Flanges	Type Of Diameter	Tolerance List
(A)	(O.D.) For Outside Diameter	When Outside Diameter is 24 Inch or less: ±1/16" (1.6 mm) When Outside Diameter is over 24": ±1/8" (3.2 mm)
(D)	(I.D.) For Inside Diameter	10 Inch and smaller: ±1/32" (0.8 in mm) 12 Inch thru 18": +1/8" (3.2 in mm) 20 Inch and larger: -1/16" (1.6 in mm)
(B)	Contact Face	1/16" (RF): ±1/32" (0.8 mm) 1/4" (RF), Tongue & Groove (male & female): ±1/64" (0.4 mm)
(J)	Hub At Base Diameter	When hub base is 24 inch or smaller: ±1/16" (1.6 mm) When hub base is over 24": ±1/8" (3.2 mm)
(H)	Diameter of hub at point of welding	5 inch and smaller: +3/32" (2.4 mm), -1/32" (0.8 mm) 6 inch and larger: +5/32" (4.0 mm), -1/32 (0.8 mm)
(P)	Drilling	Bolt circle (BC): ±1/16" (1.6 mill.) Bolt hole (BH) spacing: ±1/32" (0.8 mill.)
	Eccentricity of bolt circle (bc) with respect to facing	2 1/2" and smaller ±1/32" (0.8 mm) maximum 3" and larger ±1/16" (1.6 mm) maximum
(C)	Wall Thickness	18 inch and smaller: ±1/8" (3.2 mill.), -0" 20 inch and larger: ±3/16" (4.8 mill.), -0"
(K)	hub Length	10 Inch and smaller: ±1/16" (1.6 mm) 12 Inch and larger: ±1/8" (3.2 mm)

Stainless Steel 304 Flanges Marking

Flanges Type = (Blind)
Schedule = (SCH 40)
Material Designation = (ASTM A182 F304)
Name of Manufacturer = (SP Metals)
NPS = (2 Inch)
Class = (150)
Face Type = (RF)
Country Name = (Made In India)

Stainless Steel 304 Socket Weld Flange Density

Density g/cm3	8.03

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SS 304 Sorf Flange Dimensions

Normal Pipe Size For (NPS)	(Inside Diameter) For I.D.	O.D. For (Outside Diameter)	B.C. For (Circle Bolt)	Raised (R)	RF For (Raised Face)	H For (Hight)	Raised Face Wall Thickness	Thickness1	Flat Face (FF) (Thickness2)	Bolts Holes For (B.C.)	Number Of Bolt Hole (B.H.)
1/2	0.88	3.50	2.38	1.38	.063	1.19	.62	.38	.56	.62	4
3/4	1.09	3.88	2.75	1.69	.063	1.50	.62	.44	.56	.62	4
1	1.36	4.25	3.12	2.00	.063	1.94	.69	.50	.63	.62	4
1-1/4	1.70	4.62	3.50	2.50	.063	2.31	.81	.56	.75	.62	4
1-1/2	1.97	5.00	3.88	2.88	.063	2.56	.88	.62	.82	.62	4
2	2.44	6.00	4.75	3.62	.063	3.06	1.00	.69	.94	.75	4
2-1/2	2.94	7.00	5.50	4.12	.063	3.56	1.12	.82	1.06	.75	4
3	3.57	7.50	6.00	5.00	.063	4.25	1.19	.88	1.13	.75	4
3-1/2	4.07	8.50	7.00	5.50	.063	4.81	1.25	.88	1.19	.75	8
4	4.57	9.00	7.50	6.19	.063	5.31	1.31	.88	1.25	.75	8
5	5.66	10.00	8.50	7.31	.063	6.44	1.44	.88	1.38	.88	8
6	6.72	11.00	9.50	8.50	.063	7.56	1.56	.94	1.50	.88	8
8	8.72	13.50	11.75	10.62	.063	9.69	1.75	1.06	1.69	.88	8
10	10.88	16.00	14.25	12.75	.063	12.00	1.94	1.13	1.88	1.00	12
12	12.88	19.00	17.00	15.00	.063	14.38	2.19	1.19	2.13	1.00	12
14	14.14	21.00	18.75	16.25	.063	15.75	2.25	1.32	2.19	1.12	12
16	16.16	23.50	21.25	18.50	.063	18.00	2.50	1.38	2.44	1.12	16
18	18.18	25.00	22.75	21.00	.063	19.88	2.69	1.50	2.63	1.25	16
20	20.20	27.50	25.00	23.00	.063	22.00	2.88	1.63	2.83	1.25	20
22	22.22	29.50	27.25	25.25	.063	24.25	3.13	1.75	3.07	1.38	20
24	24.25	32.00	29.50	27.25	.063	26.12	3.25	1.82	3.19	1.38	20

AISI 304 Elastic Modulus

Elastic Modulus (GPa)	193

Stainless Steel 304 Pipe Flange Coefficient Of Thermal Expansion

Mean Coefficient of Thermal Expansion (m/m/0C)
0-1000C	0-3150C	0-5380C
17.2	17.8	18.4
Thermal Conductivity(W/m.K)
at 1000C	at 5000C
16.2	21.5

304 Stainless Flange Torque Chart

Flange Size in (Inches)	Flange Size in (Millimeter)	Radial Projection (Maximum)
Flange Size in (Inches)	Flange Size in (Millimeter)	No Deeper Than the Bottom In MM	Deeper Than the Bottom In MM
1/2	15	3.0	1.5
3/4	20	3.0	1.5
1	25	3.0	1.5
1 1/4	32	3.0	1.5
1 1/2	40	3.0	1.5
2	50	3.0	1.5
2 1/2	65	3.0	1.5
3	80	4.5	1.5
3 1/2	90	6.0	3.0
4	100	6.0	3.0
5	125	6.0	3.0
6	150	6.0	3.0
8	200	8.0	4.5
10	250	8.0	4.5
12	300	8.0	4.5
14	350	8.0	4.5
16	400	10.0	4.5
18	450	12.0	6.0
20	500	12.0	6.0
24	600	12.0	6.0

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1.4301 Steel Heat Treatment

Specific Heat	kJ/kg*K	0.50

Stainless Steel 304 Threaded Flange Electrical Properties

Electrical Resistivity (n.m)	720

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SS 304 Flange Standard

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SS 304 Flange HSN Code

HSN Code	Product Description
7318	coach- screws, Screws, nuts, bolts, screw hooks, cotters, rivets, cotter-pins, washers (including spring washers) and similar articles, of iron or steel
73181500	Other screws and bolts whether or not with their nuts or washers
8481	Taps, cocks, valves and similar appliances for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and thermostatically controlled valves
8481803	Moulds for rubber or plastics:
84818030	Industrial valves (excluding pressure-reducing valves and thermostatically controlled valves)
8455	Metal-rolling mills and rolls therefor
84559000	Other parts

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A182 F304 Hardness

Material Grade	SS304
Hardness	50-60 HRC

Stainless Steel 304 Flanges