API 6A Flanges: High Pressure Connection Solutions for Oil & Gas Wellhead Equipment
API 6A flange is a critical pressure-containing component widely used in oil and gas exploration, wellhead equipment, Christmas trees, and drilling systems. Designed according to the API Specification 6A standard, these flanges provide reliable sealing performance under high pressure, high temperature, and harsh oilfield environments.
As a professional flange manufacturer in China, Hebei Yu Jinduo supplies forged API 6A flanges with strict quality control from raw material inspection to final machining and testing.
Our API 6A flanges are available in various pressure ratings, sizes, and material grades to meet different oilfield project requirements.
| Nominal Size | Flange OD (Approx.) | Pressure Rating | Typical Application |
|---|---|---|---|
| 2-1/16" | 6" | 2,000 PSI / 3,000 PSI / 5,000 PSI / 10,000 PSI | Wellhead equipment |
| 3-1/8" | 7-1/2" | 2,000 PSI / 3,000 PSI / 5,000 PSI / 10,000 PSI | Christmas tree connection |
| 4-1/16" | 9-1/2" | 2,000 PSI / 3,000 PSI / 5,000 PSI / 10,000 PSI / 15,000 PSI | Oil & gas wellhead |
| 5-1/8" | 11" | 3,000 PSI / 5,000 PSI / 10,000 PSI / 15,000 PSI | High pressure wellhead |
| 7-1/16" | 14" | 2,000 PSI / 5,000 PSI / 10,000 PSI / 15,000 PSI | Large wellhead systems |
| 9" | 18-1/2" | 3,000 PSI / 5,000 PSI / 10,000 PSI | Drilling equipment |
| 11" | 21-1/4" | 3,000 PSI / 5,000 PSI / 10,000 PSI | High pressure applications |
| 13-5/8" | 25-1/2" | 2,000 PSI / 3,000 PSI / 5,000 PSI | Offshore drilling equipment |
| Type | Description |
|---|---|
| 6B Flange | API 6B flange designed for moderate pressure applications |
| 6BX Flange | API 6BX flange designed for high pressure and critical oilfield service |
| Blind Flange | Used for pressure isolation and wellhead closure |
| Adapter Flange | Used for connecting different flange sizes or standards |
| Companion Flange | Used for pipeline and wellhead equipment connections |
| Material Grade | Application |
|---|---|
| ASTM A105 | Carbon steel flange for general oilfield service |
| ASTM A694 F52/F60/F65 | High strength pipeline and wellhead applications |
| ASTM A350 LF2 | Low temperature oil & gas service |
| ASTM A182 F316/F316L | Corrosive environments |
| Duplex Stainless Steel | Offshore and sour service applications |
| Super Duplex UNS S32750/S32760 | High corrosion resistance environments |
Hebei Yu Jinduo provides:
✓ Forged API 6A flanges
✓ CNC machining according to customer drawings
✓ NDT inspection (UT, MT, PT)
✓ PMI testing for alloy materials
✓ MTC EN10204 3.1 certificate
✓ Heat treatment records
✓ Dimensional inspection reports
All products can be manufactured according to customer requirements, including:
Welcome to contact us for quotation!
Hebei YuanJida Group is China flange manufacturer. We mainly produce blind/blank flange, palte flange,puddle flange,slip on flange,pipe flange,steel flange,weld neck flange,thread flange,loose flange and any flange types we could supply it.[ Read More >>]
