Forged Steel Long Weld Neck Flanges Manufacturer & Exporter in India – DIPTI METAL INDUSTRIES
Forged Steel Long Weld Neck Flanges Manufacturer, Exporter & Supplier in India
DIPTI METAL INDUSTRIES is a leading manufacturer and global exporter of forged steel long weld neck flanges. These flanges are designed for high-pressure and high-temperature applications and are commonly used in process piping systems, boilers, and vessels.
What is a Long Weld Neck Flange?
A long weld neck (LWN) flange has an extended neck that acts as a nozzle, providing additional reinforcement for pressure handling. Unlike standard weld neck flanges, the neck of LWN flanges is longer and ideal for critical service.
Material Grades We Supply
- Carbon Steel: ASTM A105, A350 LF2
- Stainless Steel: SS 304, SS 304L, SS 316, SS 316L, SS 321, SS 347
- Alloy Steel: ASTM A182 F5, F9, F11, F22, F91
- Duplex & Super Duplex: UNS S31803, S32750, S32760
- Nickel Alloys: Inconel 600/625, Monel 400, Hastelloy C22/C276
Standards & Dimensions
- ASME B16.5
- ASME B16.47 Series A & B
- API 6A, MSS-SP-44
- DIN, JIS, BS, EN Standards
- Size Range: 1/2” to 60”
- Pressure Classes: 150# to 2500#
Applications of Long Weld Neck Flanges
- Pressure Vessels
- Heat Exchangers
- Boiler Installations
- Petrochemical Processing Units
- Power Plants & Refinery Pipelines
Exporting to Major Global Cities
We supply and export forged steel long weld neck flanges to:
- Middle East: Dubai, Abu Dhabi, Riyadh, Doha, Muscat, Manama, Kuwait City
- Europe: London, Manchester, Paris, Berlin, Milan, Amsterdam, Madrid
- USA & Canada: Houston, New York, Los Angeles, Chicago, Toronto, Vancouver
- Asia: Mumbai, Delhi, Chennai, Singapore, Bangkok, Jakarta, Kuala Lumpur, Tokyo
- Australia: Sydney, Melbourne, Perth, Brisbane
- Africa: Johannesburg, Nairobi, Lagos, Cairo
- South America: São Paulo, Buenos Aires, Lima, Santiago, Bogotá
Why Choose DIPTI METAL INDUSTRIES?
- ISO 9001:2015 Certified Company
- In-house forging and precision machining
- Strict quality control with 100% dimensional accuracy
- Export-ready packaging with fast global shipping
- Third-party inspection (TUV, DNV, BV, Lloyd’s) available
Frequently Asked Questions (FAQ)
What are long weld neck flanges used for?
They are used for high-pressure, high-temperature applications where the extra neck length provides reinforcement and structural stability, especially in vessels and boilers.
What is the difference between weld neck and long weld neck flanges?
Long weld neck flanges have an extended neck compared to standard weld necks and are often used in critical services such as reactors or pressure vessels.
Which materials are suitable for LWN flanges?
Common materials include carbon steel (A105), stainless steel (SS 316), alloy steel (F22, F91), and nickel alloys depending on pressure, temperature, and corrosion resistance.
Do you export long weld neck flanges globally?
Yes, we export to 40+ countries including UAE, Saudi Arabia, USA, UK, Canada, Germany, Singapore, and Australia.
What documentation do you provide?
We provide MTCs (EN 10204 3.1/3.2), hydro test reports, PMI, NACE MR0175 compliance, and third-party inspection reports upon request.
