Category
Flow Iron & Wellhead
Flow iron is the high-pressure temporary pipework of fracturing, cementing, well testing and flowback: pup joints, integral fittings, swivel joints, crossovers and hammer unions rated by figure number, from Figure 100 at 1,000 psi to Figure 1502 at 15,000 psi. Indus supplies flow iron, manifolds, API 6A flanges, ring joint gaskets, surface test trees and wellhead equipment from Dubai in standard and sour service (NACE MR0175), with TechnipFMC, Cameron, SPM, Anson and Stream-Flo equipment alongside its own range.
Match the figure, the size and the service
Flow iron is specified by the union figure, which sets both the pressure rating and the mating thread; the nominal size; the service — standard, or sour to NACE MR0175 where the fluid carries H2S; and the end on each side of every joint. Wellhead and flanged equipment is specified instead by API 6A bore and pressure, plus PSL, performance, temperature and material class. Send the working pressure, size, service and a sketch of the line, or the existing part numbers, and we match every connection.
API 6A, API 16C and NACE MR0175
Wellhead and flanged equipment is built to API 6A, and choke and kill equipment to API 16C; temporary flow line components are made to the maker's design under one of the two, named on each product page. API 6A flanges come in two families: 6B for 2,000, 3,000 and 5,000 psi with R or RX rings, and 6BX for 10,000 psi and above, and for 5,000 psi from 13-5/8″, with BX rings. Sour-service materials meet NACE MR0175 / ISO 15156.
Size range
Every size above is a part number you can quote from. Open any listing for its full table.
Delivery
Flow Iron & Wellhead across the Gulf
Ex-stock from Dubai, delivered within 3 working days in the UAE.
Flow iron is heavy, standardised and slow to source locally, which is exactly the combination that makes it worth freighting. Unions, pups, swivels and wellhead components ship from Dubai against their figure number and pressure rating, crated with mill and test documentation. Sea freight is normally the right answer here — the weight punishes air and the work is usually planned.
Beyond the Gulf
- North Africa
- Egypt, Mauritania, Morocco
- North America & Caribbean
- the United States, Panama, Trinidad and Tobago
Figure 1003 Misaligning Hammer Union — Standard Service
Figure 1002 Hammer Union — Butt Weld Ends, Standard Service
Figure 1002 Hammer Union — Threaded Ends, Standard Service, 10,000 psi
Figure 602 Hammer Union — Butt Weld Ends, Standard Service, 6,000 psi
Figure 602 Hammer Union — Threaded Ends, Standard Service, 6,000 psi
Figure 600 Hammer Union — Bronze Seated, Threaded, 6,000 psi
Figure 400 Hammer Union — 4,000 psi, Reduced Above 4 in
Figure 211 Insulated Hammer Union — 2,000 psi
Figure 207 Hammer Union Blanking Cap — 2,000 psi
Figure 206 Hammer Union — Butt Weld Ends, 2,000 psi
Figure 206 Hammer Union — Threaded Ends, 2,000 psi
Figure 200 Hammer Union — Butt Weld Ends, 2,000 psi
Figure 200 Hammer Union — Threaded Ends, 2,000 psi
Figure 100 Hammer Union — Threaded, 1,000 psi
Figure 50 Hammer Union — Threaded and Socket Weld, 500 psi
Blanking Cap, 1502 Series Male, 15,000 psi, Standard Service
Pup Joint, 602 Series M×F Integral, 6,000 psi, Standard Service
Cross, 1502 Series 3F × 1M, 10,000 psi, Sour Service
Category image · Flow Iron & WellheadCrossover Union, 1002 Series M×M, 10,000 psi, Standard Service
Category image · Flow Iron & WellheadSurface Test Tree, Snubbing 1502, 10,000 psi, Standard Service
Category image · Flow Iron & WellheadBlast Sub Pup Joint, 1502 Series M×F Integral, 15,000 psi, Standard Service
Category image · Flow Iron & WellheadSurface Test Tree, Conventional Frac 1502, 15,000 psi, Standard Service
Category image · Flow Iron & Wellhead
Pup Joint, 1502 Series F×M Integral, 15,000 psi, Standard Service
Category image · Flow Iron & WellheadSurface Test Tree, Subsea API 6BX 15K, Standard Service
Blind Flange, API 6BX 15K, Sour Service
Adapter Flange, API 6BX 15K × 1502 Female Weco, Standard Service
Choke Manifold, Single-Stage 1502, 10,000 psi, Sour Service
Crossover Union, 1502 Series F×F, 15,000 psi, Standard Service
Elbow LR 90°, 1502 Series M × F (Integral), 15,000 psi, Standard Service
Tee, 1502 Series M × F × F, 15,000 psi, Standard Service
Swivel Joint, 1502 Style 10 (1-Axis), 15,000 psi, Standard Service
Spacer Spool, 1502 Series M×F, 15,000 psi, Standard Service
Pup Joint, 1502 Series M×F Integral, 15,000 psi, Standard Service
Choke Manifold, Dual-Stage 1502, 15,000 psi, Standard Service
Category image · Flow Iron & WellheadBlanking Cap, 1502 Series Female, 15,000 psi, Standard Service
Category image · Flow Iron & WellheadCrossover Union, 602 Series M×F, 6,000 psi, Standard Service
Category image · Flow Iron & WellheadTee, 1502 Series F × F × M, 15,000 psi, Standard Service
Weld-Neck Flange, API 6BX 10K, Standard Service
Pup Joint, 1002 Series M×F Integral, 10,000 psi, Standard Service
Crossover Union, 1502 Series M×F, 10,000 psi, Sour Service
Swivel Joint, 1502 Style 30 (2-Axis), 15,000 psi, Standard Service
Category image · Flow Iron & WellheadData Header (Pressure Manifold), 602 Series, 6,000 psi, Standard Service
Multi-Well Manifold (8-Well), 1502 Series, 15,000 psi, Standard Service
Studded Cross / Tee Fitting, API 6BX 10K & 15K, Standard Service
Tee, 1502 Series M × F × F, 10,000 psi, Sour Service
Pup Joint, 206 Series F×M (BW XH DET), 2,000 psi, Sour Service
Questions we get asked
About this range
- 01What do hammer union figure numbers mean?
- The figure number identifies the union design and, roughly, its cold working pressure: Figure 100 is 1,000 psi, Figures 200 and 206 are 2,000 psi, Figure 602 is 6,000 psi, Figure 1002 is 10,000 psi, Figure 1502 is 15,000 psi and Figure 2002 is 20,000 psi. Each figure has its own nut thread and seal, so the figure must match on both halves of the joint. Ratings can be lower in the largest sizes of a figure, so check the size table rather than assuming the figure number.
- 02Can hammer unions of different figures be connected?
- No. Never join halves of different figures, even when they appear to fit. Some combinations of different figures in the same nominal size can be screwed together without sealing or holding correctly, and have separated under pressure. Industry safety alerts on mismatched hammer unions stress the same rule: check the figure number and size stamped on both halves before make-up, and keep sour and standard service components apart.
- 03Are FMC Weco, SPM and Anson unions interchangeable?
- Weco is TechnipFMC's trade name, and other makers build their figure-number unions to mate with it by figure and size. Many operators still require one maker per line or per connection, and a mixed connection should only be made where both makers state the parts are interchangeable. Tell us your operator's policy at quotation and we supply to it.
- 04What is the difference between standard and sour service flow iron?
- Sour service parts are made for fluids containing hydrogen sulphide. Their materials meet NACE MR0175 / ISO 15156, which limits hardness — 22 HRC for carbon and low-alloy steels — so they resist sulphide stress cracking, a sudden brittle failure that standard material can suffer in H2S. Sour parts are marked as such; on a sour line every component must be sour-rated.
- 05What is the difference between API 6B and 6BX flanges?
- API 6B flanges cover 2,000, 3,000 and 5,000 psi, take R or RX ring gaskets and are made up with a small gap between the faces. API 6BX flanges cover 10,000, 15,000 and 20,000 psi, and 5,000 psi in bores of 13-5/8″ and larger; they take pressure-energised BX rings and make up face to face. The two families do not bolt together, and an API flange is not interchangeable with an ASME B16.5 flange of similar size.
- 06Which ring joint gasket does a flange need?
- The ring number is set by the flange's groove. R (oval or octagonal) and RX rings share groove numbers — an RX-24 fits an R-24 groove and is pressure-energised — while BX rings fit API 6BX flanges only. The ring must be softer than the groove: soft iron or low-carbon steel for standard service, 304 or 316 stainless, or Inconel 625 for sour and corrosive service. Ring gaskets are single-use; fit a new one every time the joint is broken.
- 07What documentation comes with flow iron and wellhead equipment?
- The manufacturer's certification for the item, listed on each product page — typically the material certificate, the hydrostatic test record and a certificate of conformity, with hardness records for sour-service parts. If your operator needs more, such as a particular PSL, third-party witnessed testing or a specific certificate format, state it on the RFQ so it is confirmed before we quote.
- 08Which flow iron and wellhead brands do you supply?
- Indus supplies TechnipFMC (FMC Weco), Cameron (SLB), SPM, Anson and Stream-Flo, and also Halliburton, NOV and Forum parts and its own flow iron, manifolds and wellhead equipment.
From the blog
Written about this range
Oilfield & pressure control
R, RX and BX ring joint gaskets: which ring fits which flange
Ring joint gaskets look interchangeable and are not. How R, RX and BX rings differ, which flanges each one fits, why R-45 and R-46 share a diameter but not a groove, and what to check before making up a joint.
5 min read
Oilfield & pressure control
Wellhead components explained: casing head to christmas tree, and the surface test tree
A wellhead is a stack of pressure-containing parts, each holding a string of pipe and sealing an annulus. What each component does from the casing head up, how the christmas tree is arranged, and where a surface test tree fits.
4 min read
Oilfield & pressure control
Flow iron explained: pup joints, swivels, fittings, adapters and manifolds on a treating line
The temporary high-pressure line between the pumps and the well is built from a handful of parts joined by hammer unions. What each part does, integral against welded, standard against sour, and what keeps a treating line safe.
5 min read