Stainless Steel Flanges

Shaw Stainless & Alloy carries a large inventory of 304 and 316 stainless steel flanges in many types and sizes, from 1/2" to 36" and up. Class 150 and Class 300 dimension charts (1/2" to 24") follow the product table.

Get a price: choose a flange type below, call (800) 282-9694, or send us a message.

Select from stainless pipe flanges such as: stainless steel blind plate flanges, stainless raised face blind flanges, stainless lap joint flanges, stainless steel slip on plate flanges, raised face socket weld flanges, raised face threaded flanges, raised face weld neck flanges, and raised face slip-on flanges. We also carry a line of iron flanges and gaskets kits in a variety of materials including rubber, non-asbestos and Teflon.

Types: Weld Neck - Slip-On - Socket Weld - Threaded - Blind - RTJ - Lap Joint - Back-Up - Reducing - Orifice
Sizes: 1/2" - 36" +
Bores: S/5s - XXH
Pressures: 150 - 300 - 600
Alloys: Stainless - Carbon - Aluminum

Product Information Dimensional Data Standard Specifications Stainless Steel Grades Reference Catalog Additional Information FAQ

Filter Products

Size	Product Type	Pressure	Grade	Price	Quantity
1/2	Raised Face Blind	150#	304 Stainless Steel	$42.71	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Slip On	150#	304 Stainless Steel	$47.07	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Lap Joint	150#	304 Stainless Steel	$52.99	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Socket Weld	150#	304 Stainless Steel	$52.99	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Threaded	150#	304 Stainless Steel	$52.99	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Weld Neck	150#	304 Stainless Steel	$52.99	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Blind	150#	316 Stainless Steel	$61.22	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Slip On	150#	316 Stainless Steel	$61.22	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Slip On	300#	304 Stainless Steel	$70.59	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Lap Joint	150#	316 Stainless Steel	$74.15	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Threaded	150#	316 Stainless Steel	$74.15	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Blind	300#	304 Stainless Steel	$74.15	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Socket Weld	150#	316 Stainless Steel	$80.01	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Weld Neck	150#	316 Stainless Steel	$80.01	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Lap Joint	300#	304 Stainless Steel	$83.60	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Threaded	300#	304 Stainless Steel	$83.60	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Socket Weld	300#	304 Stainless Steel	$89.46	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Weld Neck	300#	304 Stainless Steel	$89.46	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Slip On	300#	316 Stainless Steel	$94.12	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Lap Joint	300#	316 Stainless Steel	$114.16	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Blind	300#	316 Stainless Steel	$114.16	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Threaded	300#	316 Stainless Steel	$114.16	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Socket Weld	300#	316 Stainless Steel	$124.81	Max: Min: 1 Step: 1	View	Add to Cart
1/2	Raised Face Weld Neck	300#	316 Stainless Steel	$124.81	Max: Min: 1 Step: 1	View	Add to Cart
3/4	Raised Face Slip On	150#	304 Stainless Steel	$48.32	Max: Min: 1 Step: 1	View	Add to Cart

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Product Info

We have an extensive inventory of multiple stainless steel flanges and aluminum flanges to compliment our pipe products. Most of our high quality, flanges and gasket kits are ready to ship upon request. Speak to one of our specialists and find out which flange products are available to meet your flange and piping specifications. View an overview of our stainless steel product offerings.

Dimensions

The charts below list Class 150 and Class 300 flange dimensions, drilling, bolt sizes and approximate weights from our ANSI B16.5 data sheets. Each flange type also has its own chart:

Dimensions in inches; weights are approximate, in pounds each. A dash means no value is listed.

* On raised face flanges, these dimensions include the 1/16" raised face, as on our data sheets; current ASME B16.5 tables list them 1/16" smaller. Lap joint flanges have no raised face; their thickness Q is the same as in current ASME B16.5 tables.

‡ ASME B16.5 sets socket depth only for sizes up to 3"; above that it is up to the manufacturer.

Class 150 threaded flanges need no counterbore. B1 is the standard bore; ask us about other bores. Call us for stud and machine bolt lengths.

Class 150 flange dimensions (inches)
Size	Flange OD	Thickness Q min.*	Hub dia. at base X	Raised face dia. F	Hub dia. at weld point H	Bore			Socket depth D	Thread length T, threaded (min.)	Corner radius r, lap joint	Length through hub Y
Size	Flange OD	Thickness Q min.*	Hub dia. at base X	Raised face dia. F	Hub dia. at weld point H	B1 weld neck, socket weld	B2 slip-on, socket weld (min.)	B3 lap joint (min.)	Socket depth D	Thread length T, threaded (min.)	Corner radius r, lap joint	Weld neck*	Slip-on, threaded, socket weld*	Lap joint
1/2"	3.50	0.44	1.19	1.38	0.84	0.62	0.88	0.90	0.38	0.62	0.12	1.88	0.62	0.62
3/4"	3.88	0.50	1.50	1.69	1.05	0.82	1.09	1.11	0.44	0.62	0.12	2.06	0.62	0.62
1"	4.25	0.56	1.94	2.00	1.32	1.05	1.36	1.38	0.50	0.69	0.12	2.19	0.69	0.69
1-1/4"	4.62	0.62	2.31	2.50	1.66	1.38	1.70	1.72	0.56	0.81	0.19	2.25	0.81	0.81
1-1/2"	5.00	0.69	2.56	2.88	1.90	1.61	1.95	1.97	0.62	0.88	0.25	2.44	0.88	0.88
2"	6.00	0.75	3.06	3.62	2.38	2.07	2.44	2.46	0.69	1.00	0.31	2.50	1.00	1.00
2-1/2"	7.00	0.88	3.56	4.12	2.88	2.47	2.94	2.97	0.75	1.12	0.31	2.75	1.12	1.12
3"	7.50	0.94	4.25	5.00	3.50	3.07	3.57	3.60	0.81	1.19	0.38	2.75	1.19	1.19
3-1/2"	8.50	0.94	4.81	5.50	4.00	3.55	4.07	4.10	0.88^‡	1.25	0.38	2.81	1.25	1.25
4"	9.00	0.94	5.31	6.19	4.50	4.03	4.57	4.60	0.94^‡	1.31	0.44	3.00	1.31	1.31
5"	10.00	0.94	6.44	7.31	5.56	5.05	5.66	5.69	0.94^‡	1.44	0.44	3.50	1.44	1.44
6"	11.00	1.00	7.56	8.50	6.63	6.07	6.72	6.75	1.06^‡	1.56	0.50	3.50	1.56	1.56
8"	13.50	1.12	9.69	10.62	8.63	7.98	8.72	8.75	1.25^‡	1.75	0.50	4.00	1.75	1.75
10"	16.00	1.19	12.00	12.75	10.75	10.02	10.88	10.92	1.31^‡	1.94	0.50	4.00	1.94	1.94
12"	19.00	1.25	14.38	15.00	12.75	12.00	12.88	12.92	1.56^‡	2.19	0.50	4.50	2.19	2.19
14"	21.00	1.38	15.75	16.25	14.00	13.25	14.14	14.18	1.63^‡	2.25	0.50	5.00	2.25	3.12
16"	23.50	1.44	18.00	18.50	16.00	15.25	16.16	16.19	1.75^‡	2.50	0.50	5.00	2.50	3.44
18"	25.00	1.56	19.88	21.00	18.00	17.25	18.18	18.20	1.94^‡	2.69	0.50	5.50	2.69	3.81
20"	27.50	1.69	22.00	23.00	20.00	19.25	20.20	20.25	2.12^‡	2.88	0.50	5.69	2.88	4.06
24"	32.00	1.88	26.12	27.25	24.00	23.25	24.25	24.25	2.50^‡	3.25	0.50	6.00	3.25	4.38

Class 150 flange drilling, bolts and approximate weights
Size	Drilling and bolts				Approx. weight each (lb)
Size	Bolt circle dia.	No. of holes	Hole dia.	Bolt dia.	Weld neck	Slip-on, threaded, socket weld	Lap joint	Blind
1/2"	2.38	4	0.62	1/2	1.25	1.00	1.00	1.25
3/4"	2.75	4	0.62	1/2	2.00	1.50	1.50	1.50
1"	3.12	4	0.62	1/2	2.50	2.00	2.00	2.00
1-1/4"	3.50	4	0.62	1/2	3.00	3.00	3.00	3.00
1-1/2"	3.88	4	0.62	1/2	4.50	3.00	3.50	4.00
2"	4.75	4	0.75	5/8	6.00	5.25	5.00	6.50
2-1/2"	5.50	4	0.75	5/8	10.00	8.00	7.00	9.50
3"	6.00	4	0.75	5/8	12.00	9.00	9.25	12.50
3-1/2"	7.00	8	0.75	5/8	12.00	11.00	11.00	13.00
4"	7.50	8	0.75	5/8	16.50	12.50	12.50	17.00
5"	8.50	8	0.88	3/4	19.00	15.00	15.00	20.00
6"	9.50	8	0.88	3/4	25.00	19.00	19.00	26.50
8"	11.75	8	0.88	3/4	39.00	30.00	30.00	45.00
10"	14.25	12	1.00	7/8	52.00	43.00	43.00	70.00
12"	17.00	12	1.00	7/8	80.00	64.00	64.00	110.00
14"	18.75	12	1.12	1	110.00	90.00	105.00	140.00
16"	21.25	16	1.12	1	140.00	98.00	140.00	180.00
18"	22.75	16	1.25	1-1/8	150.00	130.00	160.00	220.00
20"	25.00	20	1.25	1-1/8	180.00	165.00	195.00	285.00
24"	29.50	20	1.38	1-1/4	260.00	220.00	275.00	430.00

Class 300 flange dimensions (inches)
Size	Flange OD	Thickness Q min.*	Hub dia. at base X	Raised face dia. F	Hub dia. at weld point H	Bore			Counterbore C, threaded (min.)	Socket depth D	Thread length T, threaded (min.)	Corner radius r, lap joint	Length through hub Y
Size	Flange OD	Thickness Q min.*	Hub dia. at base X	Raised face dia. F	Hub dia. at weld point H	B1 weld neck, socket weld	B2 slip-on, socket weld (min.)	B3 lap joint (min.)	Counterbore C, threaded (min.)	Socket depth D	Thread length T, threaded (min.)	Corner radius r, lap joint	Weld neck*	Slip-on, threaded, socket weld*	Lap joint
1/2"	3.75	0.56	1.50	1.38	0.84	0.62	0.88	0.90	0.93	0.38	0.62	0.12	2.06	0.88	0.88
3/4"	4.62	0.62	1.88	1.69	1.05	0.82	1.09	1.11	1.14	0.44	0.62	0.12	2.25	1.00	1.00
1"	4.88	0.69	2.12	2.00	1.32	1.05	1.36	1.38	1.41	0.50	0.69	0.12	2.44	1.06	1.06
1-1/4"	5.25	0.75	2.50	2.50	1.66	1.38	1.70	1.72	1.75	0.56	0.81	0.19	2.56	1.06	1.06
1-1/2"	6.12	0.81	2.75	2.88	1.90	1.61	1.95	1.97	1.99	0.62	0.88	0.25	2.69	1.19	1.19
2"	6.50	0.88	3.31	3.62	2.38	2.07	2.44	2.46	2.50	0.69	1.12	0.31	2.75	1.31	1.31
2-1/2"	7.50	1.00	3.94	4.12	2.88	2.47	2.94	2.97	3.00	0.75	1.25	0.31	3.00	1.50	1.50
3"	8.25	1.12	4.62	5.00	3.50	3.07	3.57	3.60	3.63	0.81	1.25	0.38	3.12	1.69	1.69
3-1/2"	9.00	1.19	5.25	5.50	4.00	3.55	4.07	4.10	4.13	–	1.44	0.38	3.19	1.75	1.75
4"	10.00	1.25	5.75	6.19	4.50	4.03	4.57	4.60	4.63	–	1.44	0.44	3.38	1.88	1.88
5"	11.00	1.38	7.00	7.31	5.56	5.05	5.66	5.69	5.69	–	1.69	0.44	3.88	2.00	2.00
6"	12.50	1.44	8.12	8.50	6.63	6.07	6.72	6.75	6.75	–	1.81	0.50	3.88	2.06	2.06
8"	15.00	1.62	10.25	10.62	8.63	7.98	8.72	8.75	8.75	–	2.00	0.50	4.38	2.44	2.44
10"	17.50	1.88	12.62	12.75	10.75	10.02	10.88	10.92	10.88	–	2.19	0.50	4.62	2.62	3.75
12"	20.50	2.00	14.75	15.00	12.75	12.00	12.88	12.92	12.94	–	2.38	0.50	5.12	2.88	4.00
14"	23.00	2.12	16.75	16.25	14.00	13.25	14.14	14.18	14.19	–	2.50	0.50	5.62	3.00	4.38
16"	25.50	2.25	19.00	18.50	16.00	15.25	16.16	16.19	16.19	–	2.69	0.50	5.75	3.25	4.75
18"	28.00	2.38	21.00	21.00	18.00	17.25	18.18	18.20	18.19	–	2.75	0.50	6.25	3.50	5.12
20"	30.50	2.50	23.12	23.00	20.00	19.25	20.20	20.25	20.19	–	2.88	0.50	6.38	3.75	5.50
24"	36.00	2.75	27.62	27.25	24.00	23.25	24.25	24.25	24.19	–	3.25	0.50	6.62	4.19	6.00

Class 300 flange drilling, bolts and approximate weights
Size	Drilling and bolts				Approx. weight each (lb)
Size	Bolt circle dia.	No. of holes	Hole dia.	Bolt dia.	Weld neck	Slip-on, threaded, socket weld	Lap joint	Blind
1/2"	2.62	4	0.62	1/2	2	2	2	2
3/4"	3.25	4	0.75	5/8	3	3	3	3
1"	3.50	4	0.75	5/8	4	3	3	3
1-1/4"	3.88	4	0.75	5/8	5	4	4	4
1-1/2"	4.50	4	0.88	3/4	7	6	6	6
2"	5.00	8	0.75	5/8	9	7	7	8
2-1/2"	5.88	8	0.88	3/4	12	10	10	12
3"	6.62	8	0.88	3/4	15	13	13	16
3-1/2"	7.25	8	0.88	3/4	18	17	17	21
4"	7.88	8	0.88	3/4	25	22	22	27
5"	9.25	8	0.88	3/4	32	28	28	35
6"	10.62	12	0.88	3/4	42	39	39	50
8"	13.00	12	1.00	7/8	67	58	58	81
10"	15.25	16	1.12	1	91	81	91	125
12"	17.75	16	1.25	1-1/8	140	115	140	185
14"	20.25	20	1.25	1-1/8	180	165	190	250
16"	22.50	20	1.38	1-1/4	250	190	250	295
18"	24.75	24	1.38	1-1/4	320	250	295	395
20"	27.00	24	1.38	1-1/4	400	315	370	505
24"	32.00	24	1.62	1-1/2	580	475	550	790

Standard Specifications

ANSI flanges meet ASTM-ASME A182 material specification and ASA B16.5 dimensional specification. View the standard specifications.

Stainless Steel Grades

Learn about our stainless steel inventory, functionality and application of our various grades of stainless steel.

Reference Catalog

We engineered our product Reference Catalog for you to easily identify all of our products. The catalog includes specification charts and general dimensional illustrations to help you identify available and needed products.

Additional Info

Many different types of stainless steel flanges can be incorporated into a piping system. Stainless steel flanges are highly resistant to rust, are much stronger and can out perform carbon steel flanges and provide much more corrosion resistance than your aluminum or steel flanges.

ASME (American Society of Mechanical Engineers) flanges are engineered to meet certain standards. These standards are specified by the ASME and by the American National Standards Institute (ANSI). There are certain specifications in all flanges, each depending on the certain type of flange. This similarity ensures consistency with the same types of flanges used and replaced now and in the future.

There are many different types of flanges. Shaw stocks a variety of 304 and 316 stainless steel flanges in including:
Blind Plate Flanges
Lap Joint Flanges
Raised Face Blind Flanges
Raised Face Slip On Flanges
Raised Face Socket Weld Flanges
Raised Face Threaded Flanges
Raised Face Weld Neck Flanges
Slip On Plate Flanges
Blind Plate Flanges
Lap Joint Flanges

Frequently Asked Questions

What types of stainless steel flanges are available?

Types include weld neck, slip-on, socket weld, threaded, blind, RTJ, lap joint, back-up, reducing and orifice flanges. We stock raised face weld neck, slip-on, socket weld, threaded and blind flanges, lap joint flanges, and blind plate and slip-on plate flanges.

What sizes and pressure classes are available?

Sizes run from 1/2" to 36" and up, with bores from S/5S to XXH. Pressure classes are 150, 300 and 600 lb; ask us which sizes are available in each class.

Where can I find flange dimensions?

The Dimensions section of this page has Class 150 and Class 300 charts: dimensions, drilling, bolt sizes and approximate weights. Each flange type's page has a chart with just its own columns.

What is the difference between Class 150 and Class 300 flanges?

Class 300 is the higher pressure class, so a Class 300 flange of the same size is larger and thicker, usually with more or bigger bolts. For example, a 4" Class 150 flange is 9.00" OD and 0.94" thick, with eight 5/8" bolts on a 7.50" bolt circle; a 4" Class 300 flange is 10.00" OD and 1.25" thick, with eight 3/4" bolts on a 7.88" bolt circle.

Does the flange thickness include the raised face?

Yes. On our charts, the thickness Q of raised face flanges, and the lengths through the hub of weld neck, slip-on, threaded and socket weld flanges, include the 1/16" raised face, as on our data sheets. Current ASME B16.5 tables list these dimensions 1/16" smaller. Lap joint flanges have no raised face.

What specifications do your ANSI flanges meet?

ANSI flanges meet the ASTM-ASME A182 material specification and the ASA B16.5 dimensional specification.

Do you carry flange gaskets?

Yes. We carry gasket kits in a variety of materials, including rubber, non-asbestos and Teflon.

Do you carry flanges in other materials?

Yes. Besides stainless steel, our flange alloys include carbon steel and aluminum, and we also carry a line of iron flanges.

How do I get a quote?

Choose a flange type from the list on this page, call (800) 282-9694, or send us a message.

Stainless Steel Flanges

Stainless Steel Flanges

Subcategories

Filter Products

Product Info

Dimensions

Standard Specifications

Stainless Steel Grades

Reference Catalog

Additional Info

Frequently Asked Questions

What types of stainless steel flanges are available?

What sizes and pressure classes are available?

Where can I find flange dimensions?

What is the difference between Class 150 and Class 300 flanges?

Does the flange thickness include the raised face?

What specifications do your ANSI flanges meet?

Do you carry flange gaskets?

Do you carry flanges in other materials?

How do I get a quote?