Blind Flange Archives | Quality Manufacturer of Industrial Pipe Fittings

ASME B16.5 Blind Flange: Specification & Weight Reference

zhao77jie — Thu, 26 Feb 2026 08:34:58 +0000

An ASME B16.5 blind flange is a solid, flat disc used to close the end of a pipe, valve, or pressure vessel. Also known as a blank flange or flange cover, it has no center opening and is designed to block fluid flow, enable pressure testing, or provide a permanent pipe termination.

ASME B16.5 is the most widely used international standard for pipe flanges and flanged fittings in industrial piping systems. It defines dimensions, pressure ratings, materials, tolerances, and testing requirements for flanges used in oil and gas, petrochemical, power plants, and general industrial applications.

A blind flange helps isolate sections of a pipeline, simplify system maintenance, and ensure safe operation under pressure. It is installed using bolts, gaskets, and matching flanges to create a tight, leak-proof seal.

ASME B16.5 blind flanges are manufactured according to standard pressure classes that indicate their maximum allowable working pressure. The pressure rating depends on material, temperature, and size.

Common pressure classes for ASME B16.5 blind flanges include:

Class 150: Used for low-pressure applications
Class 300: Suitable for medium-pressure systems
Class 600, 900, 1500, 2500: Designed for high-pressure and extreme-service conditions

Each class follows strict dimensional and performance requirements under the ASME B16.5 standard. Selecting the correct pressure class is critical to avoid failure, leakage, or safety risks in piping systems.

The sealing face of a blind flange is one of its most important features, as it directly creates the pressure-tight seal needed for pipe closure and isolation. Under ASME B16.5 standard, blind flanges are produced with three common facing types to fit different working conditions.

Raised Face (RF)

The raised face is the most popular choice for blind flanges. A small, raised surface helps concentrate compression on the gasket, delivering strong and reliable sealing. This type is widely used for general blind flange applications such as pipeline closing, pressure testing, and routine maintenance.

Flat Face (FF)

Flat face blind flanges have a full, flat sealing surface across the flange. This design distributes bolt loading evenly, making it ideal when connecting blind flanges to cast iron or brittle flanges. It is commonly used in low-pressure piping systems.

Ring Type Joint (RTJ)

RTJ blind flanges use a precision-machined groove to hold metal ring gaskets. This structure provides an extremely strong seal under high pressure and high temperature. For this reason, RTJ blind flanges are widely used in oil, gas, petrochemical, and heavy industrial applications.

Matching the facing type with the correct gasket is essential to ensure the blind flange operates safely and without leakage. For more comprehensive learning, please click.

NPS	150LB	300LB	400LB	600LB	900LB	1500LB	2500LB
1/2	0.91	0.91	0.91	0.91	1.82	1.82	3.18
3/4	0.91	1.16	1.36	1.36	2.72	2.72	4.54
1	0.91	1.82	1.82	1.82	4.09	4.09	5.45
1 1/4	1.36	2.72	2.72	2.72	4.54	4.54	8.17
1 1/2	1.58	3.18	3.63	3.63	6.36	6.36	11.35
2	2.39	3.63	4.54	4.54	11.35	11.35	17.71
2 1/2	4.07	5.45	6.81	6.81	15.89	15.89	25.42
3	4.92	7.26	9.08	9.08	19.53	21.79	39.04
3 1/2	5.9	9.53	13.17	13.17	/	/	/
4	7.72	12.71	14.98	18.61	24.52	33.14	60.38
5	9.08	16.8	19.98	30.87	39.5	64.47	101.24
6	12.26	21.79	27.69	39.04	51.3	72.19	156.63
8	21.34	35.87	45.4	63.11	89.44	137.11	241.98
10	30.42	55.39	70.37	104.87	131.66	230.18	465.35
12	45	83.48	102.6	133.93	187.5	351.85	644.66
14	63.11	109.41	140.74	148.91	224.28	/	/
16	84.9	143.01	180.69	239.26	281.03	/	/
18	98.52	187.96	227.91	301.91	399.52	/	/
20	128.48	233.81	281.93	388.17	502.58	/	/
24	188.41	363.2	424.94	533.45	952.95	/	/

For more specific data or customized flange, please contact our team.

ASME B16.5 blind flanges are available in various forged materials to suit different temperatures, pressures, and corrosive environments.

Carbon Steel

ASTM A105
Used for general-purpose, low-to-medium temperature applications

Stainless Steel

ASTM A182 F304, F316
Corrosion-resistant, ideal for chemical, food, and marine applications

Alloy Steel

A182 F11, F22, F91
Used in high-temperature and high-pressure service such as power plants

Most blind flanges are forged for better structural integrity, density, and pressure resistance compared to cast products.

Installation & Maintenance

Proper installation and maintenance extend the service life of ASME B16.5 blind flanges and prevent leakage.

Installation Tips

Clean flange faces and remove dirt or scratches
Use a compatible gasket matching the facing type
Tighten bolts evenly in a cross pattern to avoid distortion
Follow torque specifications based on flange size and class

Maintenance

Regularly inspect for leaks, corrosion, or deformation
Replace worn gaskets during system shutdowns
Check bolt tightness after initial operation and temperature changes
Protect flange surfaces from mechanical damage and harsh environments

Safe installation and routine maintenance ensure reliable performance in industrial piping systems.

The post ASME B16.5 Blind Flange: Specification & Weight Reference appeared first on Quality Manufacturer of Industrial Pipe Fittings.

SS304 Blind Flange

zhao77jie — Fri, 29 Aug 2025 02:00:00 +0000

On August 12, 2025, our long-standing domestic client placed an order for SS304 blind flange. Having collaborated with us on multiple occasions, this customer consistently values our product quality and delivery efficiency. For this order, we strictly adhered to ASME/ASTM standards throughout production and inspection, ensuring each flange met project specifications in dimensions, performance, and surface treatment.

To facilitate the client’s project progress, we optimized our production schedule and ultimately delivered the order one week ahead of the contractual deadline, earning high praise from the client once again.

For more flange orders, please click

Product Inspection

We provide customers with Mill Test Certificates (MTC) for flanges to ensure every product meets international standards and client specifications. The MTC details chemical composition, mechanical properties, heat treatment conditions, dimensional tolerances, and relevant inspection results. By delivering comprehensive certification documentation, customers gain clear insight into flange materials and performance while receiving robust support for project quality management and third-party audits. This exemplifies our unwavering commitment to quality-first, transparent, and traceable service.

Sealing Face	RF, FF, FTJ
Size Range	1/2” – 48” / DN15 – DN1200
Pressure Rating	Class 150, 300, 600, 900, 1500, 2500lb
Standard	ASME / ANSI B16.5, ASME B16.47 Series A/B
Carbon Steel	ASTM A105 / A105N
Low Temp Carbon Steel	ASTM A350 LF2/LF3
Pipeline Steel	ASTM A694 F42 / 46 / 56 / 60 / 65
Alloy Steel	ASTM A182 F11 / 12 / 5 / 9 / 91 / 92
Stainless Steel	ASTM A182 F304/304L/304H, 316/316L, 310S, 317,347,904L
Duplex Stainless Steel	ASTM A182 F51, F53, F44

ASTM A182 F304 Flange Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A182 F304	MIN						8.0	18.0
ASTM A182 F304	MAX	0.08	2.00	0.045	0.030	1.00	11.0	20.0		0.10
ASTM A182 F304H	MIN	0.04					8.00	18.00
ASTM A182 F304H	MAX	0.10	2.00	0.045	0.030	1.00	11.00	20.00

ASTM A182 F304 Flange Mechanical Property

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	R/A %
ASTM A182 F304	515 min	205 min	30 min	50 min
ASTM A182 F304L	485 min	170 min	30 min	50 min

Nominal Pipe Size		A	C	G	H	I	J	Weight
inch	mm	mm	mm	mm	Holes	mm	mm	kg / piece
1/2	21.3	95.2	14.2	35.1	4	15.7	66.55	0.64
3/4	26.7	117.3	15.7	42.9	4	19	82.5	1.11
1	33.4	123.9	17.5	50.8	4	19	88.9	1.39
11/4	42.2	133.3	19	63.5	4	19	98.5	1.79
11/2	48.3	155.4	20.6	73.15	4	22.3	114.3	2.66
2	60.3	165. 1	22.3	91.9	8	19. 10	127	3.18
21/2	73.0	190.5	25.4	104.6	8	22.3	1.493	4.85
3	88.9	209.5	28.4	127	8	22.3	168.1	6.81
31/2	101.6	228.6	30.2	139.7	8	22.3	184.1	8.71
4	114.3	254	31.7	157.2	8	22.3	200.1	11.5
5	141.3	279.4	35	185.7	8	22.3	234.9	15.6
6	168.3	317.5	36.5	215.9	12	22.3	269.7	20.9
8	219. 1	381	1.620 41.10	269.7	12	25.4	330.2	34.3
10	273.0	444.5	47.7	323.9	16	28.4	387.3	53.3
12	323.8	520.7	50.8	381	16	31.7	450.8	78.8
14	355.6	584.2	53.8	412.8	20	31.7	514.3	105
16	406.4	647.7	57.15	469.9	20	35	571.5	137
18	457.2	711.2	60.45	533.4	24	35	628.6	175
20	508.0	774.7	63.5	584.2	24	35	685.8	221
24	609.6	914.4	69.85	692.2	24	41. 10	812.8	339

Different Face Types

Similar to other flanges, blind flanges can have different face types to match the mating flange and gasket:

Raised Face (RF): The most common type, featuring a raised ring around the bore to concentrate sealing pressure.

Flat Face (FF): Has a flat sealing surface, typically used with flat face mating flanges, often in low-pressure applications or with fragile flanges.

Ring Joint (RTJ): Features a groove to accommodate a metal ring gasket, designed for high-pressure and high-temperature service.

Characteristic of 304 Stainless Steel

304 stainless steel is one of the most widely used austenitic stainless steels. Its standard composition contains approximately 18% chromium (Cr) and 8% nickel (Ni), hence it is often referred to as “18-8” stainless steel. This material is highly favored for its outstanding comprehensive properties.

Superior Corrosion Resistance: The chromium in 304 stainless steel forms a dense oxide film on its surface, effectively resisting corrosion from air, water, weak acids, and weak alkalis. This makes it highly suitable for long-term use in general corrosive environments.

Excellent Workability: It possesses good plasticity, making it easy to process through stamping, bending, welding, and other methods. It can be readily formed into products of various shapes and specifications.

Strong Strength and Toughness: While not a high-strength steel, 304 stainless steel possesses sufficient yield strength and tensile strength to meet the demands of most engineering applications.

Hygienic and Non-Toxic: Its smooth surface facilitates easy cleaning and prevents chemical reactions with media, making it widely used in industries with stringent hygiene requirements, such as food processing and pharmaceuticals.

Carbon steel: economical and practical, suitable for common working conditions (such as water and oil).

Stainless steel (304/316): strong corrosion resistance, suitable for chemical and marine environments.

Alloy steel: resistant to high temperature and high pressure, used in power and petrochemical industries.

Applications:

Oil & Gas pipelines

Chemical and Petrochemical plants

Food & Pharmaceutical industry

Water Treatment systems

Any industrial piping requiring temporary or permanent closure

The post SS304 Blind Flange appeared first on Quality Manufacturer of Industrial Pipe Fittings.

904L Weld Neck & Blind Flange Order

zhao77jie — Tue, 10 Jun 2025 02:01:14 +0000

On April 25, 2025, we received a special order from an old customer – a batch of high-performance 904L weld neck & blind flanges. This is not just a deal, but another confirmation of the long-term trust and tacit understanding between us and our customers.

This customer has always been very demanding on product quality and material performance, and this time chose 904L flanges because of its excellent performance and extraordinary durability in extremely corrosive environments. We are well aware that these flanges will become an indispensable “connection point” in their key projects, carrying the safe transportation of fluids and the stable operation of equipment.

904L is a high alloy austenitic stainless steel, known for its excellent corrosion resistance, especially in dealing with strong acidic environments (such as sulfuric acid, phosphoric acid) and chloride corrosion (pitting, crevice corrosion and stress corrosion cracking). Therefore, 904L flanges are important components for connecting critical piping systems to ensure long-term stable operation under harsh conditions.

Contact us

Purchase List

ITEM	Description	Quanitity	Unit
1	BLIND FLANGE, DN200 RF, PN16 ASTM A182 F-904L. FORGED.EN 1092	4	EA
2	BLIND FLANGE,DN100 RF, PN10 ASTM A182 F-904L. FORGED. EN 1092	6	EA
3	BLIND FLANGE, DN80 RF, PN10 ASTM A182 F-904L, FORGED, EN 1092	2	EA
4	BLIND FLANGE, DN50 RF, PN10 ASTM A182 F-904L. FORGED. EN 1092	2	EA
5	WNRF, DN100 SCh 10S, PN10 ASTM A182 F-904L, FORGED, EN 1092	6	EA
6	WNRF, DN80 SCh 10S, PN10 ASTM A182 F-904L, FORGED, EN 1092	34	EA

Dimensional Inspection of 904L Flange

Outer Diameter
Ensure overall compatibility: Verify that the flange can be properly installed within the reserved space in the piping system without interference from surrounding equipment or structures.
Thickness
Ensure pressure resistance: Flange thickness is a critical factor in determining its pressure-bearing capacity. Sufficient thickness ensures the flange will not deform or crack under rated pressure, maintaining system sealing performance.
Sealing Face Diameter
Ensure sealing integrity: This is one of the most critical inspection points. The sealing face diameter must precisely match the selected gasket size to ensure uniform compression under pressure and form an effective seal to prevent fluid leakage.
Bolt Circle Diameter (BCD)
Ensure bolt hole alignment: This is a decisive factor for proper flange connection. An accurate bolt circle diameter ensures full alignment with the mating flange’s bolt holes, allowing bolts to pass through smoothly and be evenly stressed, avoiding damage from forced installation.
Number and Diameter of Bolt Holes
Ensure connection strength: The number and diameter of bolt holes must meet the standard to ensure enough bolts are available to bear the stress at the flange connection and to apply uniform preload on the gasket.
Pipe End Outside Diameter
Ensure match with pipe OD: This is the core objective. The outside diameter of the weld neck portion of the flange must closely match the pipe’s outside diameter to ensure proper alignment during welding, reduce misalignment, and achieve a high-quality weld joint.

Specification of Forged Steel Flange

Shape Type	Regular and Long Neck
Sealing Face	RF, FF, FTJ
Size Range	1/2″ – 48″/ DN15 – DN1200
Pressure Rating	Class 150, 300, 600, 900, 1500, 2500lb
Standard	ASME B16.5, ASME B16.47 Series A/B
Stainless Steel	ASTM A182 F304/304L/304H, 316/316L, 310S, 317,347,904L

ASTM A182 F904L Flange Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N	Ti	Cu
ASTM A182 F904L (N08904)	MIN						23	19	4			1
ASTM A182 F904L (N08904)	MAX	0.02	2	0.04	0.03	1	28	23	5	0.1		2

ASTM A182 F904L Flange Mechanical Property

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %
ASTM A182 F904L	490 min	215 min	35 min

PN16 Forged Flange Dimensions

Table 13 — Dimensions of PN 16 flanges
Dimensions in millimetres
DN	Mating dimensions					Outside diameter of neck	Bore diameters			Flange thickness				Chamfer	Collar thickness				Centre portion	Length						Neck diameters			Corner radii	Wall thickness (see 5.6.1)
	Outside diameter	Diameter of bolt circle	Diameter of bolt hole	Bolting		Outside diameter of neck	Bore diameters			Flange thickness				Chamfer	Collar thickness				Centre portion	Length						Neck diameters			Corner radii	Wall thickness (see 5.6.1)
	D	K	L	Number	Size	A	B1	B2	B3	C1	C2	C3	C4	E	F				Gmax	H1	H2	H3	H4		H5	N1	N2	N3	R1	S
	Flange type
	01, 02, 04, 05, 11, 12, 13, 21					11 21 a 34 d 35 – 37	01 12 32	02	04	01 02 04	11 12 13	21	05	02 04	32 34 d	35	36	37	05	12 13	11 34 c,d	11 34 c,d	35	36	37	11 34 c, d	12 13	21	11 12 13 21, 34d	34 d	11, 35 to 37
10	90	60	14	4	M12	172	180	21	31	14	16	16	16	3	12	5	2	25		22	35	6	35	35	7	28	30	28	4	18	See Annex A
15	95	65	14	4	M12	213	220	25	35	14	16	16	16	3	12	5	2	25		22	38	6	38	38	7	32	35	32	4	20
20	105	75	14	4	M12	269	275	31	42	16	18	18	18	4	14	6	25	3		26	40	6	40	40	8	40	45	40	4	23
25	115	85	14	4	M12	337	345	38	49	16	18	18	18	4	14	7	25	3		28	40	6	40	40	10	46	52	50	4	26
32	140	100	18	4	M16	424	435	47	59	18	18	18	18	5	14	8	3	3		30	42	6	42	42	12	56	60	60	6	26
40	150	110	18	4	M16	483	495	53	67	18	18	18	18	5	14	8	3	3		32	45	7	45	45	15	64	70	70	6	26
50	165	125	18	4	M16	603	615	65	77	20	18	18	18	5	16	8	3	3		28	45	8	45	45	20	74	84	84	6	29
65	185	145	18	8b	M16	761	775	81	96	20	18	18	18	6	16	8	3	3	55	32	45	10	45	45	20	92	104	104	6	29
80	200	160	18	8	M16	889	905	94	108	20	20	20	20	6	16	10	3	3	70	34	50	10	50	50	25	105	118	120	6	32
100	220	180	18	8	M16	1,143	1,160	120	134	22	20	20	20	6	18	10	4	4	90	40	52	12	52	52	25	131	140	140	8	36
125	250	210	18	8	M16	1,397	1,415	145	162	22	22	22	22	6	18	10	4	4	115	44	55	12	55	55	25	156	168	170	8	40
150	285	240	22	8	M20	1,683	1,705	174	188	24	22	22	22	6	20	10	5	5	140	44	55	12	55	55	25	184	195	190	10	45
200	340	295	22	12	M20	2,191	2,215	226	240	26	24	24	24	6	20	11	6	6	190	44	62	16	62	62	30	235	246	246	10	63
250	405	355	26	12	M24	2,730	2,765	281	294	29	26	26	26	8	22	12	10		235	46	70	16	70	68		292	298	296	12	63
300	460	410	26	12	M24	3,239	3,275	333	348	32	28	28	28	8	24	14	10		285	46	78	16	78	68		344	350	350	12	71
350	520	470	26	16	M24	3,556	3,595	365	400	35	30	30	30	8	26	18	10		330	57	82	16	82	68		390	400	410	12	80

Sulfuric acid treatment and production

Seawater and brine treatment

Marine engineering and offshore platforms

Desalination plants

Coastal power plants

Pollution control equipment

Flue gas desulfurization (FGD) systems

Chemical and petrochemical industries:

Pharmaceutical industry

Food and beverage industry

Pulp and paper industry

The post 904L Weld Neck & Blind Flange Order appeared first on Quality Manufacturer of Industrial Pipe Fittings.

ASTM A182 F316L Blind Flanges Order

zhao77jie — Tue, 27 May 2025 07:31:05 +0000

This purchase is a repeat order from our valued customer for ASTM A182 F316L blind flanges, consisting of one 2″ Class 600 raised face (RF) blind flange and five 1″ Class 600 raised face (RF) blind flanges. All products will be supplied in strict accordance with ASME B16.5 standards. Our ASTM A182 F316L blind flanges offer outstanding corrosion resistance, excellent mechanical strength, and reliable performance under high-pressure and high-temperature conditions, making them the ideal choice for your application. We are a reliable and professional manufacturer of high-quality flange products, covering weld neck flanges, blind flanges, socket weld flanges, and more. These products are extensively used in petroleum, natural gas, chemical, and power sectors. We places great emphasis on product quality and customer service, offering a complete range of products. Custom solutions are available upon request. Please feel free to contact us.

Product Descriptions

Descriptions	Quantity	Unit
Model: FLBL; Material: F316L (ASTM A182); Flange Facing: Raised Face (RF); Pressure Rating: ASME Class 600; Size: 2″	100	pcs
Model: FLBL; Material: F316L (ASTM A182); Flange Facing: Raised Face (RF); Pressure Rating: ASME Class 600; Size: 1″	50	pcs

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	N
A182 F316L Blind Flanges	0.08 maximum	2.0 maximum	1.0 maximum	0.045 maximum	0.030 maximum	16.00 – 18.00	2.00 – 3.00	11.00 – 14.00	67.845 minimum

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 %

The marking on ASTM A182 F316L blind flanges plays a vital role in ensuring product reliability and integrity. It not only confirms compliance with international standards but also facilitates easy on-site identification and installation. Additionally, it enables full traceability of materials and supports effective quality control throughout the product’s lifecycle.

NPS	A	C	G	H	I	J	W
	inch	inch	inch	No. of holes	inch	inch	kg/pc
	mm	mm	mm	No. of holes	mm	mm	kg/pc
1/2	3.500	0.440	1.380	4	0.620	2.380	0.42
1/2	88.90	11.20	35.10	4	15.70	60.45	0.42
3/4	3.880	0.500	1.690	4	0.620	2.750	0.61
3/4	98.60	12.70	42.90	4	15.70	69.85	0.61
1	4.250	0.560	2.000	4	0.620	3.120	0.86
1	108.0	14.20	50.80	4	15.70	79.25	0.86
1-1/4	4.620	0.620	2.500	4	0.620	3.500	1.17
1-1/4	117.3	15.70	63.50	4	15.70	88.90	1.17
1-1/2	5.000	0.690	2.880	4	0.620	3.880	1.53
1-1/2	127.0	17.50	73.15	4	15.70	98.60	1.53
2	6.000	0.750	3.620	4	0.750	4.750	2.42
2	152.4	19.10	91.90	4	19.10	120.7	2.42
2-1/2	7.000	0.880	4.120	4	0.750	5.500	3.94
2-1/2	177.8	22.40	104.6	4	19.10	139.7	3.94
3	7.500	0.940	5.000	4	0.750	6.000	4.93
3	190.5	23.90	127.0	4	19.10	152.4	4.93
3-1/2	8.500	0.940	5.500	8	0.750	7.000	6.17
3-1/2	215.9	23.90	139.7	8	19.10	177.8	6.17
4	9.000	0.940	6.190	8	0.750	7.500	7.00
4	228.6	23.90	157.2	8	19.10	190.5	7.00
5	10.00	0.940	7.310	8	0.880	8.500	8.63
5	254.0	23.90	185.7	8	22.40	215.9	8.63
6	11.00	1.000	8.500	8	0.880	9.500	11.3
6	279.4	25.40	215.9	8	22.40	241.3	11.3
8	13.50	1.120	10.62	8	0.880	11.75	19.6
8	342.9	28.40	269.7	8	22.40	298.5	19.6
10	16.00	1.190	12.75	12	1.000	14.25	28.8
10	406.4	30.20	323.9	12	25.40	362.0	28.8
12	19.00	1.250	15.00	12	1.000	17.00	43.2
12	482.6	31.75	381.0	12	25.40	431.8	43.2
14	21.00	1.380	16.25	12	1.120	18.75	58.1
14	533.4	35.10	412.8	12	28.40	476.3	58.1
16	23.50	1.440	18.50	16	1.120	21.25	76.0
16	596.9	36.60	469.9	16	28.40	539.8	76.0
18	25.00	1.560	21.00	16	1.250	22.75	93.7
18	635.0	39.60	533.4	16	31.75	577.9	93.7
20	27.50	1.690	23.00	20	1.250	25.00	122
20	698.5	42.90	584.2	20	31.75	635.0	122
24	32.00	1.880	27.25	20	1.380	29.50	185
24	812.8	47.80	692.2	20	35.10	749.3	185

The post ASTM A182 F316L Blind Flanges Order appeared first on Quality Manufacturer of Industrial Pipe Fittings.

Blind Flange Archives | Quality Manufacturer of Industrial Pipe Fittings

ASME B16.5 Blind Flange: Specification & Weight Reference

What is an ASME B16.5 Blind Flange?

Pressure Classes & Ratings for ASME B16.5 Blind Flange

Facing Types of ASME B16.5 Blind Flange

ASME B16.5 Blind Flange Weight Reference (Carbon Steel)

Common Materials for ASME B16.5 Blind Flange