Seamless and welded steel pipes, carbon steel to super duplex
Seamless and welded, carbon to super duplex, ⅛" to 120" NPS, with 3.1 certificates.
Overview
We supply line pipe and process piping in the grades Pakistani oil, gas, fertilizer and power projects specify most: API 5L Grade B and X-grades for pipelines, ASTM A106 Grade B seamless for high-temperature service, A333 Grade 6 for low temperature, A335 P11/P22/P91 chrome-moly for steam, and A312 TP304/316 and A790 duplex for corrosive duty.
Pipe is sourced from approved mills in the GCC, Europe, Korea and Japan through Al Hakim, our sister company in Dubai, with 3.1 mill test certificates, heat-number marking and third-party inspection where your purchase order requires it. Cut lengths, bevelled ends, galvanizing and 3LPE / FBE coating can be arranged before shipment.
Tubes for heat exchangers, boilers and instrumentation are available in A179, A192, A213 and seamless 316 instrument tubing.
Typical applications
- Oil and gas gathering and transmission pipelines
- Refinery and petrochemical process piping
- High-pressure steam and boiler piping
- Fertilizer plant ammonia and urea lines
- Cooling-water, fire-water and utility headers
- Heat exchanger and boiler tubes
Specified in oil & gas fields, refineries, fertilizer plants, power & heavy industry.
Specifications
| Manufacture | Seamless (SMLS) · ERW · LSAW · SSAW · HFW |
|---|---|
| Sizes | ⅛" – 120" NPS (DN6 – DN3000); Sch 10 to XXS and wall-specified |
| Carbon steel | API 5L Gr. B / X42 – X70 (PSL1 & PSL2) · ASTM A106 Gr. B · A53 · A333 Gr. 6 |
| Alloy steel | ASTM A335 P5 · P9 · P11 · P22 · P91 |
| Stainless & duplex | ASTM A312 TP304/L · TP316/L · TP321 · A790 UNS S31803 / S32750 |
| Tubes | ASTM A179 · A192 · A213 T11/T22/TP316 · A269 instrument tubing |
| Ends & finish | Plain · bevelled · threaded · galvanized · 3LPE / FBE coated |
| Certification | EN 10204 3.1 / 3.2 · NACE MR0175 · third-party inspection |
Sizes, classes and materials listed are typical of our stock and supply programme. Other combinations are quoted against your specification. See what is usually ex-stock.
Specifying the right pipe
The pipe specification is set by the line class in the project piping specification, but the choice between the common grades is worth understanding. ASTM A106 Grade B is the seamless carbon-steel pipe for high-temperature process service; A53 Grade B covers general and utility service and is available welded (ERW); API 5L Grade B and X42–X65 are pipeline grades, with PSL2 adding tighter chemistry, toughness and traceability for sour and high-pressure transmission lines. Below −29 °C, A333 Grade 6 is the low-temperature carbon steel. For hot hydrogen and steam, A335 P11, P22 and P91 chrome-moly grades; for corrosive and clean service, A312 TP304/304L and TP316/316L stainless, seamless or welded.
Seamless pipe is specified where the wall is thick, the pressure high or the specification requires it; electric-resistance-welded (ERW) and submerged-arc-welded (LSAW, SSAW) pipe is economical in larger sizes and lower classes. State the schedule or wall thickness, the length (single random, double random or cut length), the end finish (plain, bevelled to ASME B16.25, threaded) and the coating (black, galvanised, 3LPE for buried pipelines). Every length is marked with heat number and ships with the mill test certificate to EN 10204 3.1.
What to send us for a fast quote
- Grade and standard (API 5L PSL1/PSL2, ASTM A106 B, A312 TP316L…)
- Nominal size and schedule or wall thickness
- Seamless or welded (ERW, LSAW)
- Length and end finish
- Coating and marking requirements
- Quantity in metres or tonnes; documents required
Why tenders get rejected, and how we avoid it
Pipe tenders in Pakistan hinge on the mill: the bid must name the manufacturer, state whether the mill is on the operator's approved list and attach the mill test certificate format. Offers that quote a grade without a mill, or a trader's certificate without heat-number traceability, are rejected. We quote with the mill named, MTC samples attached and third-party inspection at the mill or warehouse arranged on request. More on API licences, authorisation letters and certificates.
Documentation supplied
EN 10204 3.1 material test certificate traceable to heat number, mill test certificate and dimensional report, certificate of origin and manufacturer's certificate of conformity, with NACE, fire-safe, 3.2 and third-party inspection documents where the order requires them. What every document in our package covers.
Frequently asked questions
Seamless or welded pipe?
Seamless is specified for high pressure, high temperature and sour service, and for small sizes. Welded (ERW, LSAW) is economical in larger diameters for pipelines and water, and is accepted by API 5L with the appropriate weld testing.
Can you supply pipe with third-party inspection?
Yes. We arrange inspection at the mill or at the Dubai warehouse by your nominated agency, and include the inspection release note with the shipment.
Do you supply cut lengths and small quantities?
Yes, from single lengths for maintenance to full project tonnages.
A106 Gr B or API 5L Gr B: are they interchangeable?
Often dual-certified, but not identical. A106 is a pressure-pipe standard with tighter chemistry for high-temperature service; API 5L is a line-pipe standard with its own testing and, in PSL2, controlled chemistry and toughness. Use the grade the line class calls for, and ask for dual certification only if the specification allows it.
Seamless or ERW?
Seamless where the specification requires it, in heavy walls and high classes, and for critical process lines. ERW is acceptable and cheaper for utility, water and many Class 150–300 lines, provided the line class permits welded pipe and the weld seam is tested (hydrotest and NDT).
Related products
Pipe is usually ordered together with the fittings, flanges, gaskets and bolting for the same line class; see those pages, or send us the whole material take-off for a combined quotation.
Pipe fittings
Butt-weld elbows, tees and reducers to B16.9; forged socket-weld and threaded fittings to B16.11.
Sizes, classes and brands
Flanges
Weld neck, slip-on, blind, socket weld, threaded and lap joint, Class 150 to 2500, RF and RTJ.
Sizes, classes and brands
Gaskets
Spiral wound, ring joint, kammprofile and non-asbestos sheet gaskets to ASME B16.20 and B16.21.
Sizes, classes and brands
Stud bolts & fasteners
Stud bolts and heavy hex nuts: B7 / 2H, B7M, B8M, L7, plain, galvanized and PTFE coated.
Sizes, classes and brandsRequest a quotation for pipes & tubes
Send size, class, material, quantity and required documents on WhatsApp or through the form. We reply within one working day with availability and lead time.