WeldneckflangeSupplierAndStockistInChina

Nerūdijančio plieno flanšas/

Weld neck flange

Name: Stainless steel Weld neck flange

Sizes: 1/2" (15 NB) to 48" (1200NB) DN10~DN5000

Material Types: Carbon, Alloy and Stainless Steel .

ClassClass 150, 300, 400, 600, 900, 1500, 2500(# or LB). PN 2.5 to PN 250.

Flange face type: Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove

Equipment:Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc

Application:Bitumen upgraders.Heavy oil refineries.Nuclear power (mostly seamless).Petrochemicals and acids.

Model number: KXSSWNF

Orignal: Wenzhou,Zhejiang

Standrad:ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, NUO, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092

Brand: Kaixin

Technics: Forged, Heat treated and machined

Package: Standard export package

Price: 2-500usd/pc

Delivery: Accord Quantity

Production ability: 20000pcs/month

  • Product Detail

A weld neck flange is a type of flange used for connecting pipelines in a variety of industries, including the oil and gas, chemical, and petrochemical industries. As the name suggests, the weld neck flange is welded to the end of a pipe, providing a secure and leak-proof connection.

Stainless steel weld neck flanges are widely used due to their excellent corrosion resistance and durability, making them ideal for use in harsh environments such as offshore platforms, chemical processing plants, and gas refineries. These flanges are made of high-grade stainless steel such as 304, 316, or 321, and are available in a range of sizes, pressure ratings, and configurations to suit different applications.

One of the main advantages of weld neck flanges is that they provide a strong and stable connection that can withstand high pressures, temperatures, and vibrations. The tapered neck design of the flange helps to reduce stress concentration at the base of the welding joint, making it less susceptible to cracking or failure. Additionally, the raised face of the flange provides a smooth and even sealing surface, reducing the risk of leaks or contamination.

Overall, stainless steel weld neck flanges are a reliable and long-lasting solution for joining pipelines in high-pressure and high-temperature applications. Their resistance to corrosion, chemical attack, and mechanical stress makes them an excellent choice for use in harsh environments, where safety and reliability are crucial.

Table of Content

  1. Weld Neck Flanges Specifications
  2. Applicationsof Blind Flange
  3. Material & Grades of Blind Flanges (BLRF)
  4. Weld Neck Flange Dimensions (Cl. 150/300/900/1500/2500)
  5. ANSI B16.5 Weld Neck Flange Schedule Chart, Weld Neck Flange Thickness Chart
  6. Weld Neck Flange Weight Chart
  7. DIMENSIONAL TOLERANCE WELDING NECK FLANGE
  8. Standards Referred for WN flange
  9. Weld Neck Flanges Price List

Weld Neck Flanges Specifications

Weld Neck Flanges Standards ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, NUO, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
ASME B16.5 Weld Neck Flanges Size Chart 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Weld Neck Flanges Pressure Rating ANSI Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Weld Neck Flanges
Coating Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Weld Neck Flanges
IN 6Bar 10Bar 16Bar 25Bar 40Bar Weld Neck Flanges
Most common types of Weld Neck Flanges Forged / Srieginis / Screwed / Plokštelė
Connect Type/ Flange Face Type Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove
Production technique · Forged, Heat treated and machined
Test Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
Equipment Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
Weld Neck Flanges Uses & application · Bitumen upgraders.

· Heavy oil refineries.

· Nuclear power (mostly seamless).

· Petrochemicals and acids.

Application of Blind Flange

Weld neck flange connections are often found in industrial applications where they are used to join pipes together in order to create larger structures such as boilers or tanks. They can also be used for connecting pumps, valves, and other pieces of equipment together. Additionally, they can be found in commercial applications such as plumbing systems, where they may be used for joining water lines together or creating drainage systems.

Weld Neck Flange Dimensions (Cl. 150/300/900/1500/2500)

WELDING NECK FLANGE DIMENSIONS IN INCHES

Lap Joint Flanges Dimensions Drawing

Lap Joint Flanges Dimensions Drawing

WN CLASS 150 (IN INCH)

Weld neck flange dimensions class 150 (ASME B16.5) in inches

Flange NPS Inside

Diameter

Outside

Diameter

Bolt Circle

(BC)

Raised Face

(R)

Raised Face

(RF)

H H1 Raised Face

Thickness (T)

T1 Flat Face

Thickness (T2)

Bolt Hole

(B)

Nr. of

Bolt Holes

1/2 0.62 3.50 2.38 1.38 .063 1.19 0.84 1.88 .38 1.82 .62 4
3/4 0.82 3.88 2.75 1.69 .063 1.50 1.05 2.06 .44 2.00 .62 4
1 1.05 4.25 3.12 2.00 .063 1.94 1.32 2.19 .50 2.13 .62 4
1-1/4 1.38 4.62 3.50 2.50 .063 2.31 1.66 2.25 .56 2.19 .62 4
1-1/2 1.61 5.00 3.88 2.88 .063 2.56 1.90 2.44 .62 2.38 .62 4
2 2.07 6.00 4.75 3.62 .063 3.06 2.38 2.50 .69 2.44 .75 4
2-1/2 2.47 7.00 5.50 4.12 .063 3.56 2.88 2.75 .82 2.69 .75 4
3 3.07 7.50 6.00 5.00 .063 4.25 3.50 2.75 .88 2.69 .75 4
3-1/2 3.55 8.50 7.00 5.50 .063 4.81 4.00 2.81 .88 2.75 .75 8
4 4.03 9.00 7.50 6.19 .063 5.31 4.50 3.00 .88 2.94 .75 8
5 5.05 10.00 8.50 7.31 .063 6.44 5.56 3.50 .88 3.44 .88 8
6 6.07 11.00 9.50 8.50 .063 7.56 6.63 3.50 .94 3.44 .88 8
8 7.98 13.50 11.75 10.62 .063 9.69 8.63 4.00 1.06 3.94 .88 8
10 10.02 16.00 14.25 12.75 .063 12.00 10.75 4.00 1.13 3.94 1.00 12
12 12.00 19.00 17.00 15.00 .063 14.38 12.75 4.50 1.19 4.44 1.00 12
14 13.25 21.00 18.75 16.25 .063 15.75 14.00 5.00 1.32 4.94 1.12 12
16 15.25 23.50 21.25 18.50 .063 18.00 16.00 5.00 1.38 4.94 1.12 16
18 17.25 25.00 22.75 21.00 .063 19.88 18.00 5.50 1.50 5.44 1.25 16
20 19.25 27.50 25.00 23.00 .063 22.00 20.00 5.69 1.63 5.63 1.25 20
22 21.25 29.50 27.25 25.25 .063 24.25 22.00 5.88 1.75 5.82 1.38 20
24 23.25 32.00 29.50 27.25 .063 26.12 24.00 6.00 1.82 5.94 1.38 20

WN CLASS 300 (IN INCH)

Weld neck flange dimensions class 300 (ASME B16.5) in inches

Flange NPS Inside

Diameter

Outside

Diameter

Bolt Circle

(BC)

Raised Face

(R)

Raised Face

(RF)

H H1 Raised Face

Thickness (T)

T1 Flat Face

Thickness (T2)

Bolt Hole

(B)

Nr. of

Bolt Holes

1/2 0.62 3.75 2.62 1.38 .063 1.50 0.84 2.06 .50 2.00 0.62 4
3/4 0.82 4.62 3.25 1.69 .063 1.88 1.05 2.25 .56 2.19 0.75 4
1 1.05 4.88 3.50 2.00 .063 2.12 1.32 2.44 .63 2.38 0.75 4
1-1/4 1.38 5.25 3.88 2.50 .063 2.50 1.66 2.56 .69 2.50 0.75 4
1-1/2 1.61 6.12 4.50 2.88 .063 2.75 1.90 2.69 .75 2.63 0.88 4
2 2.07 6.50 5.00 3.62 .063 3.31 2.38 2.75 .82 2.69 0.75 8
2-1/2 2.47 7.50 5.88 4.12 .063 3.94 2.88 3.00 .94 2.94 0.88 8
3 3.07 8.25 6.62 5.00 .063 4.62 3.50 3.12 1.06 3.06 0.88 8
3-1/2 3.55 9.00 7.25 5.50 .063 5.25 4.00 3.19 1.13 3.13 0.88 8
4 4.03 10.00 7.88 6.19 .063 5.75 4.50 3.38 1.19 3.32 0.88 8
5 5.05 11.00 9.25 7.31 .063 7.00 5.56 3.88 1.32 3.82 0.88 8
6 6.07 12.50 10.62 8.50 .063 8.12 6.63 3.88 1.38 3.82 0.88 12
8 7.98 15.00 13.00 10.62 .063 10.25 8.63 4.38 1.56 4.32 1.00 12
10 10.02 17.50 15.25 12.75 .063 12.62 10.75 4.62 1.82 4.56 1.12 16
12 12.00 20.50 17.75 15.00 .063 14.75 12.75 5.12 1.94 5.06 1.25 16
14 13.25 23.00 20.25 16.25 .063 16.75 14.00 5.62 2.06 5.56 1.25 20
16 15.25 25.50 22.50 18.50 .063 19.00 16.00 5.75 2.19 5.69 1.38 20
18 17.25 28.00 24.75 21.00 .063 21.00 18.00 6.25 2.32 6.19 1.38 24
20 19.25 30.50 27.00 23.00 .063 23.12 20.00 6.38 2.44 6.32 1.38 24
22 21.25 33.00 29.25 25.25 .063 25.25 22.00 6.50 2.57 6.44 1.62 24
24 23.25 36.00 32.0 27.25 .063 27.62 24.00 6.62 2.69 6.56 1.62 24

WN CLASS 400 (IN INCH)

Weld neck flange dimensions class 400 (ASME B16.5) in inches

Flange NPS Inside

Diameter

Outside

Diameter

Bolt Circle

(BC)

Raised Face

(R)

Raised Face

(RF)

H H1 Raised Face

Thickness (T)

T1 Flat Face

Thickness (T2)

Bolt Hole

(B)

Nr. of

Bolt Holes

1/2 .55 3.75 2.62 1.38 .250 1.50 0.84 2.31 0.56 2.06 0.62 4
3/4 .74 4.62 3.25 1.69 .250 1.88 1.05 2.50 0.62 2.25 0.75 4
1 .96 4.88 3.50 2.00 .250 2.12 1.32 2.69 0.69 2.44 0.75 4
1-1/4 1.28 5.25 3.88 2.50 .250 2.50 1.66 2.87 0.81 2.62 0.75 4
1-1/2 1.50 6.12 4.50 2.88 .250 2.75 1.90 3.00 0.88 2.75 0.88 4
2 1.94 6.50 5.00 3.62 .250 3.31 2.38 3.13 1.00 2.88 0.75 8
2-1/2 2.32 7.50 5.88 4.12 .250 3.94 2.88 3.37 1.12 3.12 0.88 8
3 2.90 8.25 6.62 5.00 .250 4.62 3.50 3.50 1.25 3.25 0.88 8
3-1/2 3.36 9.00 7.25 5.50 .250 5.25 4.00 3.63 1.38 3.38 1.00 8
4 3.83 10.00 7.88 6.19 .250 5.75 4.50 3.75 1.38 3.50 1.00 8
5 4.81 11.00 9.25 7.31 .250 7.00 5.56 4.25 1.50 4.00 1.00 8
6 5.76 12.50 10.62 8.50 .250 8.12 6.63 4.31 1.62 4.06 1.00 12
8 7.63 15.00 13.00 10.62 .250 10.25 8.63 4.87 1.88 4.62 1.12 12
10 9.75 17.50 15.25 12.75 .250 12.62 10.75 5.13 2.12 4.88 1.25 16
12 11.75 20.50 17.75 15.00 .250 14.75 12.75 5.63 2.25 5.38 1.38 16
14 13.00 23.00 20.25 16.25 .250 16.75 14.00 6.13 2.38 5.88 1.38 20
16 15.00 25.50 22.50 18.50 .250 19.00 16.00 6.25 2.50 6.00 1.50 20
18 17.00 28.00 24.75 21.00 .250 21.00 18.00 6.75 2.62 6.50 1.50 24
20 19.00 30.50 27.00 23.00 .250 23.12 20.00 6.87 2.75 6.62 1.62 24
22 21.00 33.00 29.25 25.25 .250 25.25 22.00 7.00 2.88 6.75 1.75 24
24 23.00 36.00 32.00 27.25 .250 27.62 24.00 7.13 3.00 6.88 1.88 24

WN CLASS 600 (IN INCH)

Weld neck flange dimensions class 600 (ASME B16.5) in inches

Flange NPS Inside

Diameter

Outside

Diameter

Bolt Circle

(BC)

Raised Face

(R)

Raised Face

(RF)

H H1 Raised Face

Thickness (T)

T1 Flat Face

Thickness (T2)

Bolt Hole

(B)

Nr. of

Bolt Holes

1/2 0.55 3.75 2.62 1.38 .250 1.50 0.84 2.31 0.56 2.06 0.62 4
3/4 0.74 4.62 3.25 1.69 .250 1.88 1.05 2.50 0.62 2.25 0.75 4
1 0.96 4.88 3.50 2.00 .250 2.12 1.32 2.69 0.69 2.44 0.75 4
1-1/4 1.28 5.25 3.88 2.50 .250 2.50 1.66 2.87 0.81 2.62 0.75 4
1-1/2 1.50 6.12 4.50 2.88 .250 2.75 1.90 3.00 0.88 2.75 0.88 4
2 1.94 6.50 5.00 3.62 .250 3.31 2.38 3.13 1.00 2.88 0.75 8
2-1/2 2.32 7.50 5.88 4.12 .250 3.94 2.88 3.37 1.12 3.12 0.88 8
3 2.90 8.25 6.62 5.00 .250 4.62 3.50 3.50 1.25 3.25 0.88 8
3-1/2 3.36 9.00 7.25 5.50 .250 5.25 4.00 3.63 1.38 3.38 1.00 8
4 3.83 10.75 8.50 6.19 .250 6.00 4.50 4.25 1.5 4.00 1.00 8
5 4.81 13.00 10.50 7.31 .250 7.44 5.56 4.75 1.75 4.50 1.12 8
6 5.76 14.00 11.50 8.50 .250 8.75 6.63 4.87 1.88 4.62 1.12 12
8 7.63 16.50 13.75 10.62 .250 10.75 8.63 5.50 2.19 5.25 1.25 12
10 9.75 20.00 17.00 12.75 .250 13.5 10.75 6.25 2.50 6.00 1.38 16
12 11.75 22.00 19.25 15.00 .250 15.75 12.75 6.37 2.62 6.12 1.38 20
14 13.00 23.75 20.75 16.25 .250 17.00 14.00 6.75 2.75 6.50 1.50 20
16 15.00 27.00 23.75 18.50 .250 19.50 16.00 7.25 3.00 7.00 1.62 20
18 17.00 29.25 25.75 21.00 .250 21.50 18.00 7.50 3.25 7.25 1.75 20
20 19.00 32.00 28.50 23.00 .250 24.00 20.00 7.75 3.50 7.50 1.75 24
22 21.00 34.25 30.63 25.25 .250 26.25 22.00 8.00 3.75 7.75 1.75 24
24 23.00 37.00 33.00 27.25 .250 28.25 24.00 8.25 4.00 8.00 2.00 24

WN CLASS 900 (IN INCH)

Weld neck flange dimensions class 900 (ASME B16.5) in inches

lange NPS Inside

Diameter

Outside

Diameter

Bolt Circle

(BC)

Raised Face

(R)

Raised Face

(RF)

H H1 Raised Face

Thickness (T)

T1 Flat Face

Thickness (T2)

Bolt Hole

(B)

Nr. of

Bolt Holes

3 2.90 9.50 7.50 5.00 .250 5.00 3.50 4.25 1.50 4.00 1.00 8
4 3.83 11.50 9.25 6.19 .250 6.25 4.50 4.75 1.75 4.50 1.25 8
5 4.81 13.75 11.00 7.31 .250 7.50 5.56 5.25 3.00 5.00 1.38 8
6 5.76 15.00 12.50 8.50 .250 9.25 6.63 5.75 2.19 5.50 1.25 12
8 7.63 18.50 15.50 10.63 .250 11.75 8.63 6.63 2.50 6.38 1.50 12
10 9.75 21.50 18.50 12.75 .250 14.50 10.75 7.50 2.75 7.25 1.50 16
12 11.75 24.00 21.00 15.00 .250 16.50 12.75 8.13 3.13 7.88 1.50 20
14 13.00 25.25 22.00 16.25 .250 17.75 14.00 8.63 3.38 8.38 1.63 20
16 15.00 27.75 24.25 18.50 .250 20.00 16.00 8.75 3.50 8.50 1.75 20
18 17.00 31.00 27.00 21.00 .250 22.25 18.00 9.25 4.00 9.00 2.00 20
20 19.00 33.75 29.50 23.00 .250 24.50 20.00 10.00 4.25 9.75 2.13 20
24 23.00 41.00 35.50 27.25 .250 29.50 24.00 11.75 5.50 11.50 2.63 20

WN CLASS 1500 (IN INCH)

Weld neck flange dimensions class 1500 (ASME B16.5) in inches

 

Flange NPS Inside

Diameter

Outside

Diameter

Bolt Circle

(BC)

Raised Face

(R)

Raised Face

(RF)

H H1 Raised Face

Thickness (T)

T1 Flat Face

Thickness (T2)

Bolt Hole

(B)

Nr. of

Bolt Holes

1/2 0.55 4.75 3.25 1.38 .250 1.50 0.84 2.63 0.88 2.38 0.88 4
3/4 0.74 5.13 3.50 1.69 .250 1.75 1.05 3.00 1.00 2.75 0.88 4
1 0.96 5.88 4.00 2.00 .250 2.06 1.32 3.13 1.13 2.88 1.00 4
1-1/4 1.28 6.25 4.38 2.50 .250 2.50 1.66 3.13 1.13 2.88 1.00 4
1-1/2 1.50 7.00 4.88 2.88 .250 2.75 1.90 3.50 1.25 3.25 1.13 4
2 1.94 8.50 6.50 3.63 .250 4.13 2.38 4.25 1.50 4.00 1.00 8
2-1/2 2.32 9.63 7.50 4.13 .250 4.88 2.88 4.38 1.63 4.13 1.13 8
3 2.90 10.50 8.00 5.00 .250 5.25 3.50 4.88 1.88 4.63 1.25 8
4 3.83 12.25 9.50 6.19 .250 6.38 4.50 5.13 2.13 4.88 1.38 8
5 4.81 14.75 11.50 7.31 .250 7.75 5.56 6.38 2.88 6.13 1.63 8
6 5.76 15.50 12.50 8.50 .250 9.00 6.63 7.00 3.25 6.75 1.50 12
8 7.63 19.00 15.50 10.63 .250 11.50 8.63 8.63 3.63 8.38 1.75 12
10 9.75 23.00 19.00 12.75 .250 14.50 10.75 10.25 4.25 10.00 2.00 12
12 11.75 26.50 22.50 15.00 .250 17.75 12.75 11.38 4.88 11.13 2.13 16
14 13.00 29.50 25.00 16.25 .250 19.50 14.00 12.00 5.25 11.75 2.38 16
16 15.00 32.50 27.75 18.50 .250 21.75 16.00 12.50 5.75 12.25 2.63 16
18 17.00 36.00 30.50 21.00 .250 23.50 18.00 13.13 6.38 12.88 2.88 16
20 19.00 38.75 32.75 23.00 .250 25.25 20.00 14.25 7.00 14.00 3.13 16
24 23.00 46.00 39.00 27.25 .250 30.00 24.00 16.25 8.00 16.00 3.63 16

WN CLASS 2500 (IN INCH)

Weld neck flange dimensions class 2500 (ASME B16.5) in inches

Flange NPS Inside

Diameter

Outside

Diameter

Bolt Circle

(BC)

Raised Face

(R)

Raised Face

(RF)

H H1 Raised Face

Thickness (T)

T1 Flat Face

Thickness (T2)

Bolt Hole

(B)

Nr. of

Bolt Holes

1/2 0.55 5.25 3.50 1.38 .250 1.69 0.84 3.13 1.19 2.88 0.88 4
3/4 0.74 5.50 3.75 1.69 .250 2.00 1.05 3.38 1.25 3.13 0.88 4
1 0.96 6.25 4.25 2.00 .250 2.25 1.32 3.75 1.38 3.50 1.00 4
1-1/4 1.28 7.25 5.13 2.50 .250 2.88 1.66 4.00 1.50 3.75 1.13 4
1-1/2 1.50 8.00 5.75 2.88 .250 3.13 1.90 4.63 1.75 4.38 1.25 4
2 1.94 9.25 6.75 3.63 .250 3.75 2.38 5.25 2.00 5.00 1.13 8
2-1/2 2.32 10.50 7.75 4.13 .250 4.50 2.88 5.88 2.25 5.63 1.25 8
3 2.90 12.00 9.00 5.00 .250 5.25 3.50 6.88 2.63 6.63 1.38 8
4 3.83 14.00 10.75 6.19 .250 6.50 4.50 7.75 3.00 7.50 1.63 8
5 4.81 16.50 12.75 7.31 .250 8.00 5.56 9.25 3.63 9.00 1.88 8
6 5.76 19.00 14.50 8.50 .250 9.25 6.63 11.00 4.25 10.75 2.13 8
8 7.63 21.75 17.25 10.63 .250 12.00 8.63 12.75 5.00 12.50 2.13 12
10 9.75 26.50 21.25 12.75 .250 14.75 10.75 16.75 6.50 16.50 2.63 12
12 11.75 30.00 24.38 15.00 .250 17.38 12.75 18.50 7.25 18.25 2.88 12

ANSI B16.5 Weld Neck Flange Schedule Chart, Weld Neck Flange Thickness Chart

WELDING NECK FLANGES BORES (in inchines)
Nom

Vamzdis

Size

Outside

Diam

Sched

10

Sched

20

Sched

30

Std.

Wall

Sched

40

Sched

60

Extra

Strong

Sched

80

Sched

100

Sched

120

Sched

140

Sched

160

Double

Extra

Strong

1/2 0.840 0.674 0.622 0.622 0.546 0.546 0.464 0.252
3/4 1.050 0.884 0.824 0.824 0.742 0.742 0.612 0.434
1 1.315 1.097 1.049 1.049 0.957 0.957 0.815 0.599
1.1/4 1.660 1.442 1.380 1.380 1.278 1.278 1.160 0.896
1.1/2 1.900 1.682 1.610 1.610 1.500 1.500 1.338 1.100
2 2.375 2.157 2.067 2.067 1.939 1.939 1.687 1.503
2.1/2 2.875 2.635 2.469 2.469 2.323 2.323 2.125 1.771
3 3.500 3.260 3.068 3.068 2.900 2.900 2.624 2.300
3-1/2 4.000 3.760 3.548 3.548 3.364 3.364 2.728
4 4.500 4.260 4.026 4.026 3.826 3.826 3.624 3.438 3.152
5 5.563 5.295 5.047 5.047 4.813 4.813 4.563 4.313 4.063
6 6.625 6.357 6.065 6.065 5.761 5.761 5.501 5.187 4.897
8 8.625 8.329 8.125 8.071 7.981 7.981 7.813 7.625 7.625 7.437 7.187 7.001 6.813 6.875
10 10.750 10.420 10.250 10.136 10.020 10.020 9.750 9.750 9.562 9.312 9.062 8.750 8.500 8.750
12 12.750 12.390 12.250 12.090 12.000 11.938 11.626 11.750 11.374 11.062 10.750 10.500 10.126 10.750
14 14.000 13.500 13.376 13.250 13.250 13.124 12.812 13.000 12.500 12.124 11.814 11.500 11.188
16 16.000 15.500 15.376 15.250 15.250 15.000 14.688 15.000 14.312 13.938 13.564 13.124 12.812
18 18.000 17.500 17.376 17.124 17.250 16.876 16.500 17.000 16.124 15.688 15.250 14.876 14.438
20 20.000 19.500 19.250 19.000 19.250 18.812 18.376 19.000 17.938 17.438 17.000 16.500 16.062
24 24.000 23.500 23.250 22.876 23.250 22.624 22.062 23.000 21.562 20.938 20.376 19.876 19.312
30 30.000 29.376 29.000 28.750 29.250 29.000
36 36.000 35.376 35.000 34.750 35.250 34.500 35.000
42 42.000 41.250 41.000          

Weld Neck Flange Weight Chart

ANSI B16.5 WELD NECK FLANGES WEIGHT (KGS)
Nom

Vamzdis

Size

150# 300# 600# 900# 1500# 2500#
  WN S/O B/K WN S/O B/K WN S/O B/K WN S/O B/K WN S/O B/K WN S/O B/K
1/2 0.7 0.4 0.5 0.8 0.7 0.8 0.9 0.8 0.8 2.1 1.8 1.9 2.1 1.8 1.9 3.2 3 3
3/4 0.8 0.7 0.8 1.4 1.2 1.2 1.6 1.4 1.4 2.7 2.4 2.7 2.7 2.4 2.7 3.6 4 4.5
1 1.1 0.8 0.9 1.7 1.4 1.5 1.9 1.7 1.7 3.9 3.6 3.7 3.9 3.6 3.7 5.4 5 5
1.1/4 1.5 1.2 1.3 2.2 1.8 2 2.6 2.1 2.4 4.5 4.1 4.3 4.5 4.1 4.3 7.8 8 8
1.1/2 1.8 1.4 1.6 3.2 2.7 2.9 3.6 3.1 3.4 6.2 5.4 5.9 6.2 5.4 5.9 11.5 11 11
2 2.7 2.2 2.6 3.6 3.2 3.5 4.7 3.9 4.4 11.3 10.5 11.3 11.3 10.5 11.3 19 17 17
2.1/2 4.4 3.5 4.1 5.4 4.5 5.3 4.8 5.4 6.8 16.3 15.8 16 16.3 15.8 16 24 25 25
3 5.2 3.8 5.1 7.3 5.9 7.2 8.7 7.3 8.9 15 12.3 16.8 21 21.5 19.5 42.6 38 39
3-1/2 6.4 5 6.5 8.9 7.5 9.2 11.6 9 12.7
4 7.5 5.6 7.5 11.8 10 12.2 18.4 16.5 18.6 24 23.2 24.5 31.8 31 33 64 58 60
5 9.2 6.5 9.2 16 12.5 16 31 28.5 30.8 38.5 37.5 39.5 59 58.8 60 111 95 101
6 11.0 8.1 11.8 20.2 16.5 22 37 36.2 38 50 48.3 51.5 72 74 75 171 146 156
8 18.4 13 20.4 31.2 25.5 36 54.5 51.5 62.2 85 75 89 124 112 125 261 220 242
10 25.5 18.4 31 44.3 35 55 98.5 76.2 102 123 110 131 207 184 215 485 420 465
12 37 28.5 47 63.5 52 82.5 105 89.5 132 168 146 187 306 264 316 698 590 665
14 51 37.5 60 86 73 108 150 102 158 198 172 224 416
16 61.5 44.5 61 112 88 139 177 150 225 225 192 259 567
18 71.5 54 93 141 115 178 228 180 285 318 272 383 736
20 85 72 127 173 139 228 285 231 365 376 330 482 929
24 119 95 190 248 212 350 372 330 532 680 632 905 1504

DIMENSIONAL TOLERANCE WELDING NECK FLANGE

Certificate Plate thickness in mm Width in mm Length in mm
Outside Diameter When O is 24″ or less. When O is over 24″. ±0.06″ ±0.12″ ±1.6 mm ±3.2 mm
Diameter of Contact Face 0.06 (1.6 mm) raised face. 0.25 (6.4 mm) raised face. ±0.03″ ±0.02″ ±0.8 mm ±0.5mm
Diameter of Hub at Point of Welding NPS 5 and smaller. NPS 6 and larger. +0.09, -0.03″ +0.16″, -0.03 +2.4 mm, -0.8mm +4.0 mm, -0.8 mm
Inside Diameter NPS 10, 12, 18, 20 and larger. +0.03″ +0.06″ +0.12″, -0.06 +0.8 mm +1.6 mm +3.2 mm, -1.6 mm
Diameter of Hub at Base Hub Base is 24″or less. Hub Base is over 24″. +0.06″ +0.12″ +1.6 mm +3.2 mm
Thickness NPS 18 and smaller. NPS 20 and larger. +0.12″ +0.19″ +3.2 mm +4.8 mm
Drilling and Facings Bolt circle diameter Bolt Hole Spacing ±0.06″ ±0.03″ ±1.6 mm ±0.8 mm
Eccentricity of Bolt Circle and Facing NPS 2 1/2 and smaller. NPS 3 and larger. ±0.03″ ±0.06″ ±0.8 mm ±1.6 mm
Length Through Hub NPS 10 and smaller. NPS 12 and larger. ±0.06″ ±0.12″ ±1.6 mm ±3.2 mm

Standards Referred for WN flange

Material Standards

  • ASTM A105/N For carbon steel weld neck flange
  • ASTM A182 F11, F22 for alloy steel
  • ASTM A182 F304 / F304L, F316 / F316L for stainless steel weld neck flange.

Manufacturing Standards

  • ASME B16.5
  • ASME B16.47
  • BS 3293
  • NUO 2630 PN 1 and PN 2.5, 2631 PN 6, 2632 PN 10, 2634 PN 16, 2634 PN 25, 2635 PN 40

Weld Neck Flanges Price List

Weld Neck Flange type Weld Neck Flange Price in USD
Stainless Steel Weld Neck Flange USD $ 10.45 /Kg
Carbon steel Weld neck flanges USD $ 65.89 /Kg
Alloy steel Weld neck flanges USD $ 55.36 /Kg
ANSI b16 5 Weld neck flanges USD $ 65.56 /Kg
ASME b16.47 Weld neck flanges USD $ 75.56 /Kg

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