What sizes and configurations are available?

This product family covers 13-5/8 in × 11 in bowl (bowl × bore) at 3K pressure class and Standard service. Other bowl / bore combinations within the same pressure class can be sourced from the OEM mill on a build-to-order basis (typically 8–16 weeks lead). For complete frac trees, Christmas trees, or wellhead stacks, RFQ with the operator's wellhead drawing or full assembly drawing.

What is the working pressure rating and PSL / PR?

3,000 psi working pressure, 3K class. Manufactured to API 6A, PSL 1, PR1. The PSL determines QA stringency (PSL 1 = baseline, PSL 4 = strictest with full third-party witness). PR1 is non-environmentally-rated; PR2 includes environmental performance testing.

Is this product suitable for sour service (H₂S wells)?

No — this is standard-service rated. For sour wells, specify the NACE MR0175 sour variant of this size and pressure class on the RFQ. Sour variants typically use API 6A material class DD, EE, or FF.

What top and bottom connections does this component use?

Top connection: API 6B 3K studded flange — 13-5/8 in, R-57 or RX-57 ring groove. Bottom connection: Surface casing thread / weld-on (e.g. 13-3/8 in BTC casing thread). The connection geometry determines what mates above and below — verify ring-groove series (R or RX for API 6B flanges, BX for API 6BX), bolting pattern, and pressure class match the connecting equipment before specifying.

What OEM brands and product lines is this compatible with?

Recognised matched-spec interchange for Stream-Flo Casing Head, Cameron Type WH 3K, FMC Casing Head. Indus is not an authorised distributor of these OEMs but every unit is engineered to be dimensionally and metallurgically interchangeable with the named OEM standard, with full API 6A traceability and OEM-source documentation. For applications requiring an OEM-stamped unit, we can source genuine OEM product on a build-to-order basis.

What materials and material class are used?

Body material: Forged alloy steel (AISI 4130). API 6A material class: AA. This class is standard-service general use. Higher classes (Inconel 625 cladding on seal pockets, F22 / F51 wetted parts, NACE-compliant bolting per B7M / 2HM) are available on request for severe sour, high-temperature, or chloride-rich service.

What standards and certifications come with each unit?

Each unit ships with: (a) API 6A design and manufacture compliance, (b) PSL 1 / PR1 certification, (c) EN 10204 3.1 mill test report (3.2 on request), (d) hydrostatic shell test certificates to API 6A, (e) hardness reports, and API monogram where the source mill holds the licence.

What is the lead time and how do I order?

Common combinations are short-lead from our Dubai warehouse — typical lead time 28 working days. Custom configurations (sour service, exotic alloys, special porting) ship 12–20 weeks ex-works depending on OEM build slots. RFQ with: wellhead schematic or assembly drawing, target spec (size / pressure class / service), and any agency-specific documentation requirements.

STREAM-FLO INDUSTRIESIH-WH-CH-API-3K-STREAMFLO· MADE IN CANADA

Casing Head, API 6B 3K (Multi-Bowl), Standard Service

Name: Casing Head, API 6B 3K (Multi-Bowl), Standard Service
Brand: Stream-Flo Industries
SKU: IH-WH-CH-API-3K-STREAMFLO

WellheadEx-stock · delivery in 3 days

VIEW 01·Red multi-bowl wellhead stack with valves in a workshop, API 6B 3K casing head

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API 6B 3K Casing Head with multi-bowl design for surface and intermediate casing strings. Stream-Flo / Cameron interchange. The first wellhead component above the conductor.

Key features

Wellhead Component Type: Casing Head
Nominal Size: 13-5/8 in × 11 in bowl
Working Pressure: 3000 psi
API 6A Pressure Class: 3K
Service Class: Standard

Wellhead Component Type: Casing Head
Nominal Size: 13-5/8 in × 11 in bowl
Working Pressure: 3000 psi
API 6A Pressure Class: 3K
Service Class: Standard

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Product description

The Casing Head, API 6B 3K (Multi-Bowl), Standard Service is an casing head for upstream oil and gas wellhead service, 3K class (3,000 psi working pressure), standard rated. Standard service rated for clean hydrocarbon and water-cut wellbores.

Construction

Component: Casing Head
Nominal size: 13-5/8 in × 11 in bowl
Vertical through-bore: 11 in (intermediate casing)
Top connection: API 6B 3K studded flange — 13-5/8 in, R-57 or RX-57 ring groove
Bottom connection: Surface casing thread / weld-on (e.g. 13-3/8 in BTC casing thread)
Body material: Forged alloy steel (AISI 4130)
Material class: AA (API 6A)
Temperature class: P (API 6A)

Performance

Working pressure 3,000 psi (3K class). Manufactured to API 6A, PSL 1 (Product Specification Level), PR1 (Performance Requirement). Hydrostatic shell test to API 6A on every unit.

Applications

Surface casing landing
Intermediate casing landing
BOP stack lower interface

OEM equivalents and compatibility

This component is supplied as a recognised dimensional and metallurgical interchange for the following OEM wellhead product lines (no implied authorised-distributor relationship — supplied by Indus Hydraulics):

Stream-Flo Casing Head
Cameron Type WH 3K
FMC Casing Head

Compliance

API 6A design and manufacture
API 6A material class: AA
API 6A temperature class: P
PSL 1 / PR1
EN 10204 3.1 / 3.2 mill test reports
Ring-groove dimension certificates and hardness reports

How to order

Confirm on your RFQ: (a) wellhead bowl size and tubing / casing bore, (b) working pressure and pressure class, (c) top and bottom connection geometry (studded vs flanged, ring-groove series), (d) service class — sour (NACE MR0175) or standard, (e) temperature class, (f) PSL and PR requirements, (g) any custom porting (kill / circulation / instrumentation outlets), and (h) certification requirements. Indus quotes ex-Dubai with full API 6A traceability and OEM-source documentation on request.

Companion products

Pair with matched-class wellhead gate valves (manual or hydraulic), API 6B flanges, ring-joint gaskets, BSL bolting, casing / tubing hangers, and tree caps in the same pressure class. For frac applications, stack into a frac tree with master valves, swab valves, wing valves, and pressure-release manifolds.

Identification

Parameter	Value
Wellhead Component Type	Casing Head

Dimensions

Parameter	Value
Nominal Size	13-5/8 in × 11 in bowl
Top Connection	API 6B 3K studded flange — 13-5/8 in, R-57 or RX-57 ring groove
Bottom Connection	Surface casing thread / weld-on (e.g. 13-3/8 in BTC casing thread)
Vertical Through-Bore	11 in (intermediate casing)

Performance

Parameter	Value
Working Pressure	3000 psi
API 6A Pressure Class	3K
Service Class	Standard
Temperature Class (API 6A)	P

Compliance

Parameter	Value
Material Class (API 6A)	AA
Product Specification Level (PSL)	PSL 1
Performance Requirement (PR)	PR1
API Specification	API 6A

Construction

Parameter	Value
Body Material	Forged alloy steel (AISI 4130)

Shipping & lead time

Lead TimeEx-stock from Dubai — delivered within 3 working days in the UAE. Export orders ship on the lane stated for the destination.

OriginMade in Canada

Shipped worldwide from our Dubai warehouse. Transit, routes and documentation for 126 destinations

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Casing Head, API 6B 3K (Multi-Bowl), Standard Service

Key features

Product description

Construction

Performance

Applications

OEM equivalents and compatibility

Compliance

How to order

Companion products

Identification

Dimensions

Performance

Compliance

Construction

Shipping & lead time

Written about this part

Wellhead components explained: casing head to christmas tree, and the surface test tree

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