API 6A Weld Neck Flanges | 2000-20000 PSI

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Product Overview

DEENPU weld neck flanges are API 6A integral flanges with a welding neck for butt-welding to pipe, used in high-pressure wellhead, manifold and flowline construction where a threaded or studded connection is not suitable. The heavy neck gives a smooth transition of stress from flange to pipe.

Flanges are machined from forged alloy steel, ring-grooved or raised-face facing per API 6A, and are available in all standard sizes with working pressures from 2000 to 20000 PSI.

Key Features

• Integral API 6A weld neck construction
• 2000 – 20000 PSI working pressure
• Ring groove (RTJ) or raised face per API 6A
• Forged alloy steel, fully heat treated
• Standard and sour service (NACE MR0175) materials

Technical Specifications

Dimensions & Technical Data

API 6A weld neck flange dimensions

Quality & Testing

Every DEENPU API 6A Weld Neck Flanges is manufactured under our API-compliant quality system: raw material traceability, 100% dimensional inspection, hydrostatic pressure testing and hardness verification before packing. Material certificates, inspection reports and API documentation are provided with shipment on request.

Applications

• Wellhead and manifold piping tie-ins
• High pressure flowline construction
• Choke and kill line terminations
• Test separator and burner boom piping

Frequently Asked Questions

Q: Weld neck or threaded flange — which should I use?

A: Use weld neck where permanent, leak-free high-pressure piping is required; use threaded or studded flanges where field disassembly is needed. Both are available to the same API 6A ratings.

Q: Are sour service flanges available?

A: Yes — NACE MR0175-compliant material and hardness control is available on request.