Weldo Flange

Teshi Fittings, a premier manufacturer of pipe fittings, offers high-quality Weldo Flanges designed for various industries including Petroleum, Chemical, Hydraulic, Food, and more. Crafted with meticulous precision and adherence to international quality standards, our Weldo Flanges provide seamless and robust connections for piping systems. With a commitment to excellence and customer satisfaction, Teshi Fittings delivers superior performance and durability in every flange, offering tailored solutions to meet specific project requirements. Experience the difference with Teshi Fittings’ Weldo Flanges and trust in our expertise for all your piping needs.

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Standard Specification of Weldo Flange

Standards / DimensionsANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, BS, GOST, MSS SP-44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605
Size1/2″ (15 NB) to 48″ (1200NB)
Flange Face Types / Connection TypeFlat Face Flange (FF), Raised Face Flange (RF), Ring Joint Flange (RTJ), Lap Joint Flange, Male and Female Flange (M&F), Large and Small Tongue-and-Groove Flange (T&G)
DimensionsANSI B16.5, ANSI B16.47 Series A & B, ASA, API-605, MSS SP44, AWWA, Custom Drawings
BSBS4504 , BS4504, BS1560, BS10
Class / Pressure Rating150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Material & Grades of Weldo Flange

Stainless SteelASTM/ASME A/SA182:- F304, F304L, F316, F316L, ASTM/ASME A/SA351:- CF3, CF3M, CF8, CF8M, DIN 1.4306, DIN 1.4301, DIN 1.4404, DIN 1.4401, DIN 1.4408, DIN 1.4308, DIN 1.4306, DIN 1.4409
Duplex & Super Duplex SteelS31803 / S32205 A182:- Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 S32750 / S32760 A182:- Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Carbon SteelASTM/ASME A/SA105 A/SA105N and A/SA216-WCB, DIN 1.0460, DIN 1.0402, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, CS High Yield ASTM A694 / A694 (F52, F56, F60, F65, F70, F80)
Low Temperature Carbon SteelASTM A350, LF2, LF3
Alloy SteelASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
Nickel AlloyNickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Grade I & II)

Dimension of Weldo Flange

WELDOFLANGE DIMENSIONS

NPSABCD
1/23/4
19.05		1.3/8
34.93		15/16
23.81		5/8
15.88
3/47/8
22.23		1.5/8
41.28		1.3/16
30.16		13/16
20.64
11.1/16
26.99		2
50.80		1.7/16
36.51		1.1/32
26.19
1¼1¼
31.75		2.3/8
60.3		1.3/4
44.45		1.3/8
34.93
1½1.5/16
33.34		2.7/8
73		2
50.80		1.5/8
41.28
21½
38.10		3½
88.90		2.9/16
65.09		2.1/16
52.39
2½1.5/8
41.28		4.1/16
103.19		3
76.20		2.7/16
61.91
31.3/4
44.45		4.13/16
122.24		3.11/16
93.66		3.1/16
77.79
3½2
50.80		5.3/8
136.53		3.7/8
98.43		3.9/16
90.49
42
50.80		6
152.40		4.3/4
120.65		4
101.60
52¼
57.15		7.1/8
180.98		5.9/16
141.29		5.1/16
128.59
62.3/8
60.3		8½
215.90		6.11/16
169.86		6.1/16
153.99
82.3/4
69.85		10.3/8
263.53		8.11/16
220.66		7.15/16
201.61
103.1/16
77.79		12.9/16
319.09		10.13/16
274.64		10
254.00
123.3/8
85.73		14.7/8
377.83		12.13/16
325.44		12
304.80
143½
88.90		16.1/8
409.58		14.1/16
357.19		13¼
336.55
163.11/16
93.66		18¼
463.55		16.1/16
407.99		15¼
387.35
184.1/16
103.19		20.3/4
527.05		18.5/8
473.08		17¼
438.15
204.5/8
117.48		23.1/16
585.79		20.1/16
509.59		19¼
488.95
245.3/8
136.53		27.7/8
708.03		25.1/8
638.18		23¼
590.55
NPSABCD

General notes:

  • Dimensions: Top Row in Inches / Bottom Row in millimeters.
  • Root Gap – X – “Space” for welding the O’let is raised off the run pipe to establish proper weld gap by placing spacers, e.g. welding rods, under the fitting. This provides a uniform welding gap between the curvature of the run and base of fitting.
  • L = Dimensions Center Line of Run Pipe + X (Root Gap) + A (height of Weldolet).
  • Bevelled Ends ASME B16.9 and B16.25.
  • Source comes from Bonney Forge (except the sizes in millimeters).

Manufacturing process and features of Weldo Flange

Manufacturing Process:

  • Material Selection: Weld neck flanges are manufactured from materials such as carbon steel, stainless steel, alloy steel, and sometimes exotic materials depending on the application requirements.
  • Cutting and Preparation: Raw materials are cut and prepared according to specifications. This includes cutting the pipe to length and preparing the flange face for welding.
  • Forming the Hub: The hub of the weld neck flange is formed by gradually tapering and shaping the material to create a smooth transition from the flange to the pipe.
  • Heat Treatment (if required): Depending on the material and specifications, heat treatment processes such as normalizing, annealing, or quenching and tempering may be applied to achieve desired mechanical properties.
  • Machining: Precision machining is performed on the flange face and the inside diameter of the bore to ensure smoothness and accuracy, which is critical for sealing purposes.
  • Welding: The weld neck flange is welded to the pipe using butt-welding techniques. This creates a strong and leak-proof joint between the flange and the pipe.
  • Inspection and Testing: Flanges undergo rigorous inspection and testing to ensure they meet dimensional accuracy, surface finish requirements, and quality standards such as pressure testing, ultrasonic testing, and visual inspection.

Features of Weldo Flange :

  • Strength and Durability: Weld neck flanges are known for their high strength due to the welded connection to the pipe and the gradual transition of the hub, which reduces stress concentrations.
  • Leak Resistance: The welding process ensures a secure and leak-proof joint, making weld neck flanges suitable for high-pressure and critical applications.
  • Alignment: The long tapered hub helps in aligning the pipe and reducing turbulence and erosion inside the pipeline.
  • Pressure Rating: They are designed to withstand high-pressure applications, making them suitable for industries where pressure containment is critical.
  • Compatibility: Weld neck flanges are compatible with a wide range of piping systems and are available in various sizes and pressure ratings to meet specific project requirements.
  • Versatility: They can be used in both high-temperature and low-temperature applications, depending on the material selected and the specifications followed.

Overall, Weldo Flange are preferred in industries where reliability, durability, and performance under extreme conditions are essential requirements. Their design and manufacturing process ensure they meet stringent quality and performance standards.

Application Of Weldo Flange

High-Pressure Piping SystemsWeldo Flange are widely used in industries such as oil and gas, petrochemicals, and power generation where high-pressure piping systems require secure and leak-free connections. The welded joint provides strength and reliability under high pressure.
Critical Process PipelinesIn industries where process integrity is crucial, such as chemical processing, pharmaceuticals, and food processing, Weldo Flange ensure that connections are secure and maintain process purity.
Oil and Gas Exploration and ProductionWeldo Flange are used in pipelines, refineries, and offshore platforms where they withstand harsh environmental conditions, high pressures, and corrosive fluids.
Power GenerationThey are utilized in power plants for connecting piping systems that carry steam, water, or other fluids under high temperature and pressure conditions.
Shipbuilding and Marine ApplicationsWeldo Flange are essential in shipbuilding for connecting pipelines that carry fuel, water, and other fluids, ensuring reliability and durability in marine environments.
Industrial ProcessingIn manufacturing industries such as automotive, steel production, and mining, Weldo Flange are used in various applications where secure pipe connections are required.
Heat Exchangers and Boiler SystemsThey are integral components in heat exchangers and boiler systems, ensuring efficient heat transfer and operational reliability.
Infrastructure and ConstructionFor large-scale construction projects involving pipelines, water treatment plants, and infrastructure development, Weldo Flange are used to connect pipes securely and efficiently.

Weldo Flange Available Types

Weldoflange ManufacturersWeldoflange Exporters
Stainless Steel WeldoflangeForged Steel Raised Face Weldoflange
Carbon Steel WeldoflangeANSI B16.47 Weldoflange
Alloy Steel Weldoflange StockholdersClass 150 LBS Weldoflange Stockiests
Nickel Alloy Weldoflange SuppliersMSS SP44 Weldoflange
Inconel WeldoflangeClass 300 LBS Weldoflange
Alloy Steel Weldoflange ExporterClass 600 LBS Weldoflange
Duplex Steel WeldoflangeDIN / EN Weldoflange Manufacturers
Titanium Alloy WeldoflangeASME / ANSI B16.5 Weldolet Flange
Super Duplex Steel Weldolet FlangeANSI / ASME Weldoflange
Copper Nickel WeldoflangeHigh Quality Weldoflange Exporters

Others Products

Frequently Asked Questions

Most frequent questions and answers

A weldo flange is a type of flange designed with an integral welding neck, combining the features of a welding neck flange and a slip-on flange. It has a short, stubby neck that is welded to the end of a pipe or fitting, providing a strong and leak-proof connection. The weldo flange design facilitates easy installation and alignment.

Weldo flanges are available in a range of sizes to accommodate various pipe diameters and pressure ratings. Standard sizes are offered, and custom sizes can be manufactured to meet specific needs.

Weldo flanges are installed by aligning the flange’s stubby neck with the pipe and welding it into place. The welding process typically involves both internal and external welds to ensure a strong and leak-proof connection. Proper alignment and welding technique are essential for achieving optimal performance.

Yes, we offer custom manufacturing solutions for weldo flanges to meet specific requirements. Please contact us with your detailed specifications, and we will work with you to produce flanges tailored to your needs.

The lead time for weldo flanges depends on the complexity and volume of the order. After reviewing your specifications, we will provide an estimated lead time. We are committed to delivering all projects on schedule while maintaining the highest quality standards.

Yes, weldo flanges can be used for both liquid and gas applications, provided they are made from appropriate materials and installed correctly to handle the specific conditions of the system, including pressure and temperature.

Weldo flanges are typically made from materials such as carbon steel, stainless steel, alloy steel, and other metals. The material selection depends on the specific requirements of the application, including the type of fluid or gas, temperature, pressure, and environmental conditions.

Weldo flanges are used in applications where a strong, secure, and leak-proof connection is required. They are commonly found in industries such as oil and gas, petrochemical, and power generation. The design is particularly useful in systems where ease of alignment and installation is critical.

Weldo flanges are manufactured to comply with various industry standards, such as ASME B16.5, ASME B16.47, and API standards. These standards define the dimensions, tolerances, and material requirements to ensure compatibility and reliability in piping systems.

Weldo flanges offer several advantages, including:

  • Ease of installation: Simplifies alignment and installation due to the integrated welding neck.
  • Strong connection: Provides a robust and reliable joint suitable for high-pressure and high-temperature applications.
  • Leak-proof seal: Ensures a secure, leak-proof connection when properly welded.
  • Versatility: Suitable for a variety of applications and pipe sizes.

Regular inspection of weldo flanges involves checking for weld integrity, leaks, and signs of corrosion or damage. It is important to ensure that the welds remain intact and that the flange continues to perform reliably under the conditions of the system.