Weld-Neck Flange, API 6B 5K, Standard Service

The Weld-Neck Flange, API 6B 5K, Standard Service is a weld-neck flange (Butt-Weld × API 6B flange) rated for 5,000 psi working pressure in standard service. Standard service rated for clean hydrocarbon, completion fluid, and water-cut streams.

Construction

• Type: Weld-Neck Flange
• Series / class: 5K (5K)
• Configuration: Butt-Weld × API 6B flange
• End A: API 6B 5K flanged (R or RX ring groove)
• End B: Butt-Weld neck (XH/XXH schedule per spec)
• Bore / ID: Matches the welded line ID
• Material: Forged alloy steel (4130/4140), tempered
• Temperature rating: -20°F to 250°F (-29°C to 121°C)

Available sizes

This product family covers the following stock or short-lead nominal sizes: 2-1/16 in, 3-1/8 in, 4-1/16 in. Other sizes within the same series and pressure class can be sourced from the OEM mill on a build-to-order basis (8–14 weeks lead). Indus quotes a firm size, pressure class, configuration, and service-class match against your inquiry data sheet — call or RFQ with the line specification and we will return a complete matched bill of materials.

Performance

Working pressure 5,000 psi (5K class), standard rated. Manufactured to API 6A, material class AA. Hydrostatic shell test to API 6A on every unit. Mill test reports per EN 10204 3.1 / 3.2 supplied with each shipment.

Applications

• Wellhead-to-piping welded transitions
• Christmas-tree fabrication
• Production-line tie-ins

OEM equivalents and compatibility

This product is supplied as a recognised matched-pressure interchange for the following OEM standards and product lines (no implied authorised-distributor relationship — supplied by Indus Hydraulics):

• Stream-Flo 5K WN
• Cameron 5K
• FMC 5K

Compliance

• API 6A
• Material class: AA
• EN 10204 3.1 / 3.2 mill test reports
• Hydrostatic test certificates per unit

How to order

Confirm on your RFQ: (a) exact nominal size and bore ID, (b) line working pressure and pressure class, (c) end-connection style and gender on each port (M / F, NPT / BW / Integral / RTJ / RF), (d) service class — sour (NACE MR0175) or standard, (e) any additional ports or taps (1/2 in NPT instrument tap, 9/16 in Autoclave, etc.), and (f) required certifications beyond the standard MTR + hydrostatic. Indus quotes ex-Dubai with full traceability.

Companion products

Pair with matched-pressure hammer unions, swivel joints (Chiksan-style 50 / 100 / 200 series), pup joints, integral crosses / tees / elbows, plug valves, ball valves, and check valves of the same WECO figure class. For wellhead and frac-tree integration, also specify API 6A flanges, wellhead adapters, and ring-joint gaskets in the matched pressure class.