Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges

Product Details
Customization: Available
Standard: ANSI, DIN, GB, JIS, GOST, BSW
Type: Welding Flange
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  • Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges
  • Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges
  • Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges
  • Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges
  • Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges
  • Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges
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Overview

Basic Info.

Model NO.
1/2"-24"
Material
Stainless Steel
Structure
Flanges
Connection
Flanged
Sealing Surface
RF
Manufacturing Way
Forging
Certificate
ISO9001
Pressure
150# 300# 400# 600# 900# 1500# 2500#
Usage
Suitable for Water, Oil and Gas Industrial
Connection Endstsocket Weld or Threaded
NPT, Bsp, BSPT etc
Factory
Over 25 Years Experience
Transport Package
Customized
Specification
1/2"-24"
Trademark
GUCHENG
Origin
Dingxiang
HS Code
73079100
Production Capacity
50000 Pieces/Year

Product Description

Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges

Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck FlangesASME/ANSI B16.5 FORGING FLANGE -- Welding Neck Flange Class 600 - Piping & Pipeline 

The welding neck flange (WN) conforming to ASME/ANSI B16.5 is a typical integral-type flange. It is forged integrally with the tapered neck which is butt welded to the pipe. This design provides a smooth transition with little stress concentration since transferring stress to the adjoining pipe reduces the high-stress concentration at the base of the flange. There are no gaps or recesses that could lead to crevice corrosion. The tapered neck is also known as the "nozzle neck" or "high hub". Although expensive, the welding neck flange is the best-designed butt weld flange available since the long tapered hub provides superior strength and resistance to dishing.

Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges
According to ASME B16.5, the hub of the welding neck flange can be roughly divided into a tapered portion and a straight length. The straight length of 6 mm is machined to precisely match with the adjoining pipe so that the welding can be done conveniently. Weld neck flanges are bored to match the inside diameter of the adjoining pipe. The thinner the wall of the pipe, the larger the bore through the flange. The thicker the wall of the pipe, the smaller the bore. Because of these matching relationship, there is no restriction to the flow. Turbulence and erosion are therefore eliminated.
The ASME B16.5 welding neck flange shall be furnished with cut square end when wall thickness is less than 5 mm, plain bevel end when wall thickness is from 5 mm to 22 mm inclusive, or compound bevel end when wall thickness is greater than 22 mm. The butt welding ends shall be machined in accordance with the requirements of ASME B16.25. The dimensions and tolerances of plain bevel and compound bevel are illustrated in below two drawings. In particular, the wall thickness t shall conforming to the adjoining pipe's wall thickness requirement; a root face in width f of 2 mm shall be machined at the top of the bevel with tolerance of ±1 mm.
Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges
Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges

Three most common facing types are available including flat face (FF), raised face (RF), and ring joint face (RTJ). Welding neck flanges are normally used in severe service applications involving high pressures, high temperatures, large external loads or cryogenic conditions.


The Welding neck flanges are available across various materials: Cabon Steel, Stainless steel, Duplex Steel.......

Product Parameters

Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges
Slip-On Flange (SO) Weld Neck Flange (WN) Socket Weld Flange (SW)
Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flangeshttps://guchengforging.en.made-in-china.com/product-list-1.html Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges
Threaded Flange (TH) Lap Joint Flange (LJ) Blind Flange (BL)
 
Nominal
Pipe
Size
Outside
Dlam.
Diam.
at Base
of Hub
0,D,of
Raised
Face
Thickness BORE LENGTH   THRU   HUB Diam.of
Hub at
Bevel
 Radius
  of
  Filet
Thread
Length
Welding Neck
Socket Welding
Slip-on
Socket
Welding
Lap
Joint
Counter
  Bore
 Min
Welding
Neck
Slip-on
Threaded
Socket
Welding
Lap
Joint
D X G t B1 B2 B3 B T1 T2 T3 A R Q
 1/2 95 38.1 35.1 14.2 See Note(1)
To be specified
by purchaser
22.4 22.9 23.6 52.3 22.4 22.4 21.3 3.0 15.7
 3/4 117 47.8 42.9 15.7 27.7 28.2 29.0 57.2 25.4 25.4 26.7 3.0 15.7
    1 124 53.8 50.8 17.5 34.5 35.1 35.8 62.0 26.9 26.9 33.5 3.0 17.5
1 1/4 133 63.5 63.5 20.6 43.2 43.7 44.5 66.5 28.4 28.4 42.2 4.8 20.6
1 1/2 155 69.9 73.2 22.4 49.5 50.0 50.5 69.9 31.8 31.8 48.3 6.4 22.4
2     165 84.1 91.9 25.4 62.0  62.5 63.5 73.2 36.6 36.6 60.5 7.9 28.4
2 1/2 191 100.1 104.6 28.4 74.7 75.4 76.2 79.2 41.1 41.1 73.2 7.9 31.8
    3 210 117.3 127.0 31.8 90.7 91.4 92.2 82.6 46.0 46.0 88.9 9.7 35.1
3 1/2 229 133.4 139.7 35.1 103.4 104.1 104.9 85.9 49.3 49.3 101.6 9.7 39.6
4 273 152.4 157.2 38.1 116.1 116.8 117.6 101.6 53.8 53.8 114.3 11.2 41.1
5 330 189.0 185.7 44.5 143.8 144.5 144.5 114.3 60.5 60.5 141.2 11.2 47.8
6 356 222.3 215.9 47.8 170.7 171.6 171.5 117.3 66.5 66.5 168.4 12.7 50.8
8 419 273.1 269.7 55.6 221.5 222.3 222.3 133.4 76.2 76.2 219.2 12.7 57.2
10 508 342.9 323.9 63.5 276.4 277.4 276.4 152.4 85.9 111.3 273.1 12.7 65.0
12 559 400.1 381.0 66.5 327.2 328.2 328.7 155.4 91.9 117.3 323.9 12.7 69.9
14 603 431.8 412.8 69.9 359.2 360.2 360.4 165.1 93.7 127.0 355.6 12.7 73.2
16 686 495.3 469.9 76.2 410.5 411.2 411.2 177.8 106.4 139.7 406.4 12.7 77.7
18 743 546.1 533.4 82.6 461.8 462.3 462.0  184.2 117.3 152.4 457.2 12.7 79.2
20 813 609.6 584.2 88.9 513.1 514.4 512.8 190.5 127.0 165.1 508.0 12.7 82.6
24 940 717.6 692.2 101.6 616.0  616.0 614.4 203.2 139.7 184.2 609.6 12.7 91.9
 
Nomina
Pipe
Size
Depth
of
Socket

DRILLING
BOLTING
APPROXIMATE     WEIGHT
Dlam
of
Bolt
(Inch)
 Stud Bolt Lenglh
Bolt
Clrcle
Dlam.
Number
of
Holes
Dlam
of
Holes
0.25"
Raised
Face
Male-
Female
Tongue
-Groove
Ring
Joint

Welding
Neck
Sllp-on
and
Threaded
Lap
Jolnt

Bllnd
Socket
Weldlng
Y Kg lb Kg Ib Kg Ib Kg lb Kg   Ib
 1/2 9.7 66.5 4 15.7  1/2 76.2 69.9 76.2 0.90 2.00 0.91 2.00 0.80 1.80 0.91 2.00 0.91 2.00
 3/4 11.2 82.6 4 19.1  5/8 88.9 82.6 88.9 1.59 3.50 1.40 3.00 1.36 3.00 1.40 3.00 1.36 3.00
1     12.7 88.9 4 19.1  5/8 88.9 82.6 88.9 1.90 4.00 1.70 3.70 1.59 3.50 1.81 4.00 1.81 4.00
1 1/4 14.2   98.6 4 19.1  5/8   95.3 88.9 95.3 2.49 5.50 2.27 5.00 2.04 4.50 2.40 5.30 2.60 5.70
1 1/2 15.7  114.3 4 22.4  3/4 108.0 101.6 108.0 3.63 8.00 3.10 6.80 2.95 6.50 3.40 7.50 3.18 7.00
2 17.5 127.0 8 19.1  5/8 108.0 101.6 108.0 4.54  10.00  3.63  8.00  3.63  8.00  4.40  9.70  3.90 8.60
2 1/2 19.1 149.4 8 22.4  3/4 120.7 114.3 120.7 6.35 14.00 5.44 12.00 4.99 11.00 6.80 15.00 5.90 13.00
3 20.6 168.1 8 22.4  3/4 127.0 120.7 127.0 8.16 18.00 7.26 16.00 6.35 14.00 8.90 19.60 7.40 16.30
3 1/2 22.4 184.2 8 22.4  7/8 139.7 133.4 139.7 11.80 26.00 9.53 21.00 9.08 20.00 13.17 29.00    
   4 23.9 215.9 25.4  7/8 146.1 139.7 146.1 16.78 37.00 14.97 33.00 14.06 31.00 18.60 41.00    
   5 23.9 266.7 28.4 1     165.1 158.8 165.1 30.87 68.00 28.50 62.80 27.50 60.60 30.84 68.00    
   6 26.9 292.1 12  28.4 1     171.5 165.1 171.5 36.77 80.00 36.32 80.00 35.38 78.00 38.00 83.80    
   8 31.8 349.3 12 31.8 1 1/8 190.5 184.2 196.9 50.80 112.00 44.00 97.00 50.80 112.00 62.20 137.00    
   10 33.3 431.8 16 35.1 1 1/4 215.9 209.6 215.9 86.26 190.00 76.20 168.00 74.00 163.00 102.00 224.90    
12     39.6 489.0 20 35.1 1 1/4 222.3 215.9 222.3 102.51 226.00 97.52 215.00 108.86 240.00 132.00 291.00    
14 41.4 527.1 20 38.1  1 3/8 235.0 228.6 235.0 121.56 268.00 102.00 224.80 111.00 244.70 158.00 348.30    
 16 44.5 603.3 20 41.1 1 1/2 254.0 247.7 254.0 177.06 290.00 149.82 330.20 165.71 365.30 224.73 495.40    
18 49.3 654.1 20 44.5 1 5/8 273.1 266.7 273.1 215.65 475.40 180.10 412.30 194.00 427.70 285.00 628.30    
20 54.1 723.9 24 44.5 1 5/8 285.8 279.4 292.1 267.86 590.50 231.54 510.50 258.78 570.50 365.00 804.70    
24 63.5 838.2 24 50.8 1 7/8 330.2 323.9 336.6 372.00 820.00 330.00 725.50 362.00 798.00 533.45 1176.0    

Notes:
(1) For the inside diameter of pipes (corresponding to 'Bore' (B1) of Welding Neck Flanges), refer to page 60.
(2) Class 600 flanges except Lap Joint will be furnished with  0.25" (6,35mm) raised face, which is not included in thickness'(t) and Length through Hub'(Ti),(T2).
(3) For Slip-on, Threaded, and Lap Joint and Socket Welding Flanges, the hubs can be shaped either vertically from base to top or tapered within the limits of  7 degrees.
(4) Blind Flanges may be made with the same hub as that used for Sllp-on Flanges or without a hub.
(5) The gasket surface and backside (bearing surface for bolting) are made parallel within 1 degree. To accomplish parcels, spot facing is scared out according to MSS SP-9, without reducing thickness(t).
(6) Dimensions of sizes 1/2" through 3 1/2" are the same as for Class 400 Flanges.
(7) Depth of Socket (Y) is covered by ANSI B16.5 only in sizes through 3 inch, over 3 inch is at the manufacturer's optlon. 

ANSI B16.5 FORGED FLANGES TOLERANCE
Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges
THREAD,SOCKET-WELDING,                                                    SLIP-ON,LAP JOINT AND BLIND. WELDING NECK
Outside
Diameter
When O.D.is
24"or less
±1/16"(1.6mm) Outside
Diameter
When O.D.is
24"or less
±1/16"(1.6mm)*
When O.D.is
Over  24"
±1/8"(3.2mm)* When O.D.is
Over  24"
±18"(3.2mm)
Inside
Diameter
Threaded Within limits on
boring gauge
Inside
Diameter
10"and Smaller ±1/32"(0.8mm)
20"thru 18" ±1/16"(1.6mm)
Socket-Welding
Slip-on and
Lap joint
10"&Smaller
+1/32"(0.8mm).0"
12"&Larger
+1/16"(1.6mm).O"
20"and Larger +1/8"(3.2mm)
-1/16"(1.6mm)
Outside
Diameter
of Hub
5"and Smaller +3/32"(2.4mm)
-1/32"(0.8mm)
Diameter
of Hub
at Base
When Hub Base is
24"or Smaller
±1/16"(1.6mm)*
6"and Larger +5/32"(4.0mm)
-1/32"(0.8mm)
When Hub Base is
Over  24"
±1/8"(3.2mm)*
Diameter
of Contact
Face
1/16"Raised Face ±1/32"(0.8mm) Diameter
of Contact
Face
116"Raised Face  ±1/32"(0.8mm)
1/4"Raised Face Tongue & Groove
Male,Female
±1/64"(0.4mm) 14"Raised Face
Tongue &Groove
Male,Female
±1/64"(0.4mm)
Diameter
of
Counterbore
Same as for Inside Diameter Diameter of
Hub at Point
of Welding
5"and Smaller +3/32"(2.4mm)*
-1/32"(0.8mm)
6"and Larger +5/32"(4.0mm)
-1/32"(0.8mm)
Drilling Bolt Circle ±1/16"(1.6mm) Drilling Bolt Circle ±1/16"(1.6mm)
Bolt Hole Spacing ±1/32"(0.8mm) Bolt Hole Spacing ±1/32"(0.8mm)
Eccentricity of
Bolt Circle with
Respect to Facing
21/2"Smaller
1/32"(0.8mm)Max.
3"&Larger
1/16"(1.6mm)Max
Eccentricity of
Bolt Circle with
Respect to Facing
21/2"Smaller
1/32"(0.8mm)Max.
3"&Larger
1/16"(1.6mm)Max.
Eccentricity of
Bolt Circle with
Respect to Bore
1/32"(0.8mm)Max.* Eccentricity of
Bolt Circle with
Respect to Bore
1/32"(0.8mm)Max.*
Eccentricity of
Facing with
Respect to Bore
1/32"(0.8mm)Max.* Eccentricity of
Facing with
Respect to Bore
1/32"(0.8mm)Max.*
Thickness 18"and Smaller +1/8"(3.2mm).0^ Thickness 18"and Smaller +1/8"(3.2mm),0"
20"and Larger +3/16"(4.8mm).04 20"and Larger +3/16"(4.8mm).O
Length
Thru Hub
10"and Smaller ±1/16"(1.6mm) Length
Thru Hub
10"and Smaller ±1/16"(1.6mm)
12"and Larger ±1/8"(3.2mm) 12"and Larger ±1/8"(3.2mm)
Notes:
This tolerance is not covered in ANSI B16.5, but maker's option.


STANDARD FINISHES for Face of Flange (ANSI  B16.5)
Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges
STOCK FINISH:
The most widely used gasket finish.because practically is suitable for all ordinary service conditions. This is a continuous spiral groove. Flanges size 12" (304.8mm)and smaller are produced with a 1/16" round-nosed tool at a feed of 1/32" per revolution. For sizes 14" (355.6mm)and larger. the finish is made with a 1/8" round-nosed tool at a feed of 3/64" per revolution.
SPIRAL SERRATED OR PHONOGRAPHIC:
This finish is produced by using a 90°round-nosed tool.
CONCENTRIC SERRATED:
This finish is produced by using a 90°round-nosed tool.
SMOOTH  FINISH:
The cutting tool employed shall have an approximate 0.06"radius.
The resultant surface finish shall have a 125μ inch to 250μ inch(ANSI B16.5 para 6.4;4.1)
1. RAISED FACE AND LARGE MALE AND FEMALE
    A serrated-concentric or serrated-spiral finish with 34 to 64 grooves per inch is used.
    The cutting tool employed has an approximate 0.06 in.radius.The resultant surface finish shall have a 125μ inch(3.2m)to 500μ inch(12.5μm) approximate roughness.
2. TONGUE AND GROOVE AND SMALL MALE AND FEMALE
    The gasket contact surface does not exceed 125μ in. (3.2μm)roughness
3. RING JOINT
    The inside wall surface of the gasket groove does not exceed 63μin.(1.6μm)roughness,
4. BLIND
    Blind flanges need not be faced in the center if, when this center part is raised, its diameter is at least 1 in. smaller than the inside diameter of the corresponding pressure class fittings. When the center part is depressed, its diameter is not greater than the inside diameter of the corresponding pressure class fittings. Machining of the depressed center is not required.

Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck FlangesThe manufacturing process of forged flanges begins with the selection of high-quality steel, which is heated and shaped under high pressure in forging dies to enhance its strength and durability. After forging, the flanges are trimmed, heat-treated to relieve internal stresses, and precisely machined to meet the required dimensions. They undergo rigorous inspection and testing for quality assurance, followed by surface treatments for enhanced corrosion resistance. This process results in flanges that are strong, reliable, and suitable for demanding industrial environments.
Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck FlangesManufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges

Company Profile

Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck FlangesDingxiang Country Gu Cheng Forging Company Ltd.  is a leading manufacturer in Dingxiang County, Shanxi Province, known as the "Forging Capital of China." Established with a deep-rooted history in forging, we specialize in producing high-quality flanges and forged components for a wide range of industrial applications. Our extensive product line includes ANSI, DIN, JIS, and EN standard flanges and customized forged parts designed to meet specific customer requirements.

Gu Cheng Forging with over 30 years of experience in producing high-quality forged flanges. Including Weld Neck Flange (WN)Slip-On Flange (SO)Blind Flange (BL)Socket Weld Flange (SW)Lap Joint FlangePlate Flange, and Customized forged flange.

At Gu Cheng Forging, we serve a global market, providing flanges and forged components for industries such as oil and gas, chemical processing, power generation, shipbuilding, and more. We pride ourselves on our ability to deliver tailored solutions, meeting the highest standard of safety, performance, and efficiency.

As a factory, we can tailor flanges based on your specific requirements for size, material, pressure rating, and surface treatment (galvanization, black paint, etc.). By preventing rust and deterioration, the coating enhances the flange's performance, offering long-term resilience and reducing maintenance needs over time.

Dingxiang Country Gu Cheng Forging Company Ltd,  strives to be a trusted partner for all your forging needs, ensuring long-term cooperation and mutual success.

Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck FlangesManufacturer of ANSI B16.5 Ss Raised Face Weld Neck FlangesManufacturer of ANSI B16.5 Ss Raised Face Weld Neck FlangesManufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges

Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck FlangesManufacturer of ANSI B16.5 Ss Raised Face Weld Neck FlangesManufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges

Q1: Are you a manufacturer or a trading company?
A1: We are a professional manufacturer with over 30 years of experience in forging flanges. Our factory is located in Dingxiang, China, known as the "Forging Capital." We produce high-quality, customized forged flanges, offering factory-direct pricing and ensuring top-notch quality.


Q2: What types of flanges do you produce?
A2: We manufacture a wide range of forged flanges, including:

  • Weld Neck Flange (WN)
  • Slip-On Flange (SO)
  • Blind Flange (BL)
  • Socket Weld Flange (SW)
  • Threaded Flange (TH)
  • Lap Joint Flange
  • Plate Flange
All our flanges comply with international standards such as ASME, DIN, JIS, and BS.

Q3: What materials do you use?
A3: We offer flanges in a variety of materials, including:
  • Carbon Steel
  • Stainless Steel
  • Alloy Steel

Each material is sourced from certified suppliers, ensuring durability and performance in diverse industrial applications.

Q4: Can you provide customized flanges?
A4: Absolutely! As a factory, we specialize in customization. We can tailor flanges based on your specific requirements for size, material, pressure rating, and surface treatment (galvanization, black paint, etc.).


Q5: How do you ensure the quality of your products?
A5: Quality is our top priority. Every flange undergoes a strict inspection process, including:

  • Material analysis
  • Dimensional checks
  • Pressure testing
  • Surface treatment inspections

Our CNC machining ensures precise dimensions, and we adhere to strict international standards throughout the manufacturing process.Manufacturer of ANSI B16.5 Ss Raised Face Weld Neck Flanges

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