🔷 Stub End – Butt Weld Pipe Fitting

Manufacturer, Supplier & Exporter – VikTech Fittings

🔹 Product Overview

VikTech Fittings is a trusted manufacturer, supplier, and exporter of premium quality Stub Ends manufactured in accordance with ASME B16.9, MSS-SP-43, DIN, EN, and international standards.

A Stub End is a butt weld pipe fitting used in combination with a Lap Joint Flange to create a flanged joint in a piping system. It allows easy dismantling, alignment flexibility, and cost-effective flange solutions.

Stub ends are widely used in industries where frequent maintenance, inspection, or pipeline modification is required.

🔹 What is a Stub End?

A Stub End consists of:

• A short pipe section

• One flared (lap) end

• One beveled butt weld end

It is welded to the pipe on one side, and the lap joint flange slides over it to form a bolted flange connection.

This design provides:

✔ Easy alignment during installation
✔ Reduced flange cost (using backing flange)
✔ Convenient dismantling
✔ Improved corrosion resistance options

🔹 Types of Stub Ends

🔸 Long Pattern Stub End

• Most commonly used

• Face thickness similar to standard flange

• Suitable for most industrial applications

🔸 Short Pattern Stub End

• Shorter length

• Used for low pressure systems

• Cost-effective solution

🔸 MSS Type A / B / C

Manufactured as per MSS-SP-43 for stainless steel piping systems.

🔹 Technical Specifications

✔ Standards

• ASME B16.9

• MSS-SP-43

• DIN

• EN 10253

✔ Size Range

• ½” NB to 48” NB

✔ Wall Thickness

• SCH 10

• SCH 20

• SCH 40

• SCH 80

• SCH 160

✔ End Type

• Butt Weld End (Beveled as per ASME B16.25)

• Lap Joint Facing

🔹 Manufacturing Process

At VikTech Fittings, stub ends are manufactured using:

• Hot forming process

• Precision machining of lap face

• Heat treatment

• Surface finishing

• Dimensional inspection

This ensures:

✔ Accurate flange seating
✔ Smooth sealing surface
✔ Uniform wall thickness
✔ High mechanical strength

🔹 Materials Available

🔸 Carbon Steel

• ASTM A234 WPB

• ASTM A420 WPL6

🔸 Stainless Steel

• ASTM A403 WP304 / 304L

• ASTM A403 WP316 / 316L

🔸 Alloy Steel

• ASTM A234 WP11 / WP22 / WP91

🔸 Duplex & Super Duplex

• ASTM A815 UNS S31803

• ASTM A815 UNS S32750

🔹 Applications of Stub End

✔ Oil & Gas Industry
✔ Petrochemical Plants
✔ Refineries
✔ Power Plants
✔ Chemical Processing Units
✔ Offshore & Marine Projects
✔ Food & Pharmaceutical Industries

Stub ends are especially useful where:

• Frequent dismantling is required

• Corrosion-resistant material is needed for wetted part only

• Cost reduction is important

🔹 Advantages of Stub End

✔ Easy pipe alignment
✔ Lower flange cost
✔ Easy maintenance
✔ Suitable for corrosive environments
✔ High pressure & temperature capability
✔ Long service life

🔹 Testing & Quality Control

All stub ends supplied by VikTech Fittings undergo:

• Visual Inspection

• Dimensional Inspection

• Surface Finish Check

• PMI Testing

• Ultrasonic Testing

• Third Party Inspection (if required)

Mill Test Certificate (MTC) provided as per EN 10204 3.1 / 3.2.

🔹 Surface Finish

• Black Painted

• Pickled & Passivated

• Anti-rust Coated

• As per customer requirement

🔹 Packaging & Supply

• Wooden crates

• Pallet packing

• Export worthy packaging

• Proper marking & tagging

We supply across:

✔ PAN India
✔ Middle East
✔ Africa
✔ Europe
✔ Southeast Asia