Butt Weld Fittings

Complete Range of Butt Weld Pipe Fittings

Wellgrow offers a complete selection of butt weld fittings for changing direction, branching, reducing pipe size, closing pipe ends, and connecting pipes to flanged systems.

Available products include:

• 90° Long Radius Elbow
• 90° Short Radius Elbow
• 45° Elbow
• Equal Tee
• Reducing Tee
• Concentric Reducer
• Eccentric Reducer
• Pipe Cap
• Stub End

Each fitting is manufactured to the specified dimensions and tolerances to support proper fit-up, welding, and installation

Engineering Specifications

Butt Weld Fittings Specifications

*Applicable dimensions, tolerances, and standard coverage vary by fitting type and size. ASME B16.9 covers factory-made wrought butt weld fittings from NPS 1/2 through NPS 48. For larger sizes, please specify the required dimensions or project standard in your RFQ.

Welded and Seamless Butt Weld Fittings

Wellgrow supplies both welded and seamless fittings to meet different size, material, construction, and inspection requirements.

For ASTM A403 WP grades, the applicable class suffix—such as W, WX, S—identifies the fitting construction and the specified NDE method or extent. The selected class identifies the construction method and may also determine the applicable nondestructive examination requirements.

Please include the required construction, fitting class, and NDE requirements in your inquiry.

Materials Available

Stainless Steel Butt Weld Fittings

ASTM A403 WP304, WP304L, WP316, and WP316L Stainless Steel Butt Weld fittings provide corrosion resistance for appropriately selected process fluids and operating environments. Material selection should consider the medium, temperature, pressure, corrosion conditions, and project specifications.

Carbon Steel Butt Weld Fittings

Carbon Steel Butt Weld fittings are commonly specified for carbon steel pressure piping systems. The required grade, wall thickness, heat treatment, and inspection requirements should be determined by the piping design and applicable code.

How to Select and Order Butt Weld Fittings

Five Factors to Confirm Before Ordering

To select the correct butt weld fitting, confirm the following five items:

1. Operating conditions
   Identify the process fluid, design temperature, design pressure, corrosion conditions, and applicable piping code.
2. Material and grade
   Select stainless steel or carbon steel according to the service conditions and project specification.
3. Fitting type
   Choose an elbow for changing direction, a tee for branching, a reducer for changing pipe size, a cap for closing a pipe end, or a stub end for use with a lap-joint flange.
4. Pipe size and wall thickness
   Specify NPS or DN and the required Schedule or nominal wall thickness. The fitting bore and welding ends should match the connected piping and project requirements.
5. Standard and documentation
   State the required dimensional standard, material specification, fitting class, inspection requirements, and certificate type.

Long Radius vs. Short Radius Elbows

A long-radius elbow provides a larger centerline radius and is commonly selected where piping space permits. A short-radius elbow is used where installation space is limited or where the piping design specifically requires a compact change in direction.

The final selection should follow the piping layout, flow requirements, and applicable design code.

Concentric vs. Eccentric Reducers

A concentric reducer keeps the connected pipes on the same centerline and is commonly used in vertical piping or applications where centered flow transition is required.

An eccentric reducer keeps one side of the pipe level. It may be selected for horizontal piping to support drainage, avoid unwanted vapor or liquid pockets, or maintain the required top-of-pipe or bottom-of-pipe elevation.

RFQ Checklist

To receive an accurate quotation, please provide:

• Fitting type
• Size in NPS or DN
• Schedule or wall thickness
• Material specification and grade
• welded or Seamless construction
• Required fitting class, if applicable
• Dimensional standard and edition
• Quantity
• Required MTC, NDE, PMI, radiography, or third-party inspection
• Marking and packaging requirements
• OEM or private-label requirements
• Delivery destination
• Required delivery date

Wellgrow works with OEM and private-label customers, distributors, agents, stockists, and importers. Please contact us to confirm product availability, manufacturing lead time, export packing, and documentation requirements.

Industrial Applications

Wellgrow butt weld fittings are supplied for applications including:

• Oil and gas
• Petrochemical plants
• Chemical processing
• Water and wastewater treatment
• Pulp and paper mills
• Power generation
• Shipbuilding
• General industrial piping

Inspection, Testing, and Documentation

Quality Control and Inspection

Wellgrow controls product quality from raw-material selection through forming or machining, heat treatment, inspection, marking, and packing.

Depending on the product specification, fitting class, and purchase-order requirements, inspection and documentation may include:

• Raw-material verification
• Chemical composition records
• Mechanical property records
• Dimensional inspection
• Visual and surface examination
• Heat-treatment records
• Material and heat-number traceability
• Applicable nondestructive examination
• Final marking and packing inspection

Mill Test Certificates and Inspection Records

EN 10204 3.1 inspection certificates and applicable test records can be supplied according to the material specification and purchase-order requirements.

Radiographic or X-ray examination for welded butt weld fittings and third-party inspection can also be arranged when specified. Please state all documentation and inspection requirements in the RFQ so we can be reviewed before order confirmation.

Frequently Asked Questions

What are butt weld fittings?

Butt weld fittings are pipe fittings with welding ends that are joined directly to pipes or other fittings by butt welding. When properly specified, welded, and inspected, they create a strong and continuous connection for industrial piping systems.

What materials are available?

Wellgrow supplies stainless steel fittings in ASTM A403 WP304, WP304L, WP316, and WP316L, as well as carbon steel fittings. Material availability may vary by fitting type, size, wall thickness, and construction.

What standards are available?

Butt weld fittings are available to ASME B16.9, ASME B16.28, MSS SP-43, JIS B2312, and JIS B2313 dimensional requirements. Project-specific or legacy requirements can be reviewed upon request.

The applicable material specification, dimensional standard, edition, and inspection requirements should be stated in the purchase order.

What sizes and wall thicknesses do you supply?

Standard supply ranges from 1/2 inch to 80 inches, depending on the fitting type, material, manufacturing method, and required standard.

Available wall thicknesses include common stainless steel and carbon steel schedules, as well as Sch.10S, Sch. 40S, Sch. 80S, STD, XS, XXS, and project-specific heavy-wall requirements up to Schedule 160.

What is the difference between welded and seamless butt weld fittings?

Welded fittings are produced from welded pipe or plate and may require a specified level of nondestructive examination. Seamless fittings are manufactured without a longitudinal weld seam.

The appropriate construction depends on size, material, fitting class, service conditions, and project specifications.

Do you provide EN 10204 3.1 Mill Test Certificates?

EN 10204 3.1 inspection certificates can be supplied every shipment. The documentation includes chemical composition, mechanical properties, heat-treatment information, and applicable inspection or test results.

What information is required for a quotation?

Please provide the fitting type, size, wall thickness, material grade, construction, dimensional standard, quantity, inspection requirements, delivery destination, and required delivery date.

Providing complete technical and commercial requirements helps us confirm availability and prepare an accurate quotation.

Request a Butt Weld Fittings Quote

Wellgrow Industries supplies stainless steel and carbon steel butt weld fittings for OEM, distribution, stock replenishment, and industrial project requirements.

Send us your fitting list, specifications, quantities, documentation requirements, and delivery destination. Our team will review the requirements and prepare a quotation.