When the most demanding oil & gas contractors, EPC firms, or infrastructure developers require certified pipes and tubes, it is Metinox Overseas! As a firm with a long history in the industrial steel supply chain and a steadfast dedication to quality, we had become one of the most reliable suppliers of pipes and tubes in Qatar, with a focus on providing the industry in Doha, Ras Laffan Industrial City, the North Field expansion, and Mesaieed Petrochemical City with top-tier services.
We offer all kinds of industrial pipes & tubes, including API 5L carbon steel line pipes, ASTM A106 process pipes, and ASTM A312 stainless steel, duplex, super duplex, alloy steel, nickel alloy, and special nonmetallic pipes, all with full 3.1 mill test certificates according to EN10204 and QatarEnergy requirements. We offer sizes ranging from 1/4" NPS to 72" NPS in all wall schedules, with same-week delivery directly to your project site in Qatar.
Metinox Overseas has more than a decade of technical experience, supply chain know-how, and sourcing accuracy that comes from each order—whether a single spool of seamless pipe or bulk line pipe for a North Field pipeline job. We have a 4-hour response to your RFQ requests; third-party inspection assistance from SGS, Bureau Veritas, and Intertek; and pre-qualification support for QatarEnergy AVL, making us your project's supply partner.
Request a QuoteTable of Contents
- Product & Service Overview
- Carbon Steel Pipes & Tubes
- Stainless Steel Pipes & Tubes
- Duplex & Super Duplex Stainless Steel Pipes
- Alloy Steel Pipes — High-Temperature & High-Pressure
- Specialty, Nickel Alloy & Non-Metallic Pipes
- Pipe Schedule & Wall Thickness Reference — Qatar Stock
- Specifications of Pipes & Tubes
- Pipe Manufacturing Types We Supply
- International Standards & Certifications
- Applications Across Qatar's Energy Sector
- Value-Added Services for Qatar Projects
- Metinox Overseas vs. Other Pipe Suppliers in Qatar
- Pipes & Tubes Dimensions & Availability Chart
- End Preparation, Lengths & Documentation
- Frequently Asked Questions (FAQ)
Product & Service Overview
Metinox Overseas supplies the complete range of certified industrial pipes and tubes required across Qatar's energy, petrochemical, construction, and infrastructure sectors. Every product in our portfolio is sourced from approved global manufacturers and arrives with full traceability documentation.
Stainless Steel Pipes
Stainless Steel Seamless Pipes
Stainless Steel Welded Pipes
Stainless Steel EFW Pipes
Stainless Steel Tubes
Special Alloys Pipes & Tubes
Alloy Steel Pipes
Alloy Steel Tubes
Carbon Steel Pipes & Tubes
ASTM A333 Gr 6 LTCS Pipes
Duplex Steel Pipes
Duplex Steel Tubes
Super Duplex Steel Pipes
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Super Duplex Steel Tubes
1. Carbon Steel Pipes & Tubes
The backbone of Qatar's oil & gas transmission and process piping infrastructure. Metinox Overseas stocks API 5L, ASTM A106, and ASTM A53 carbon steel pipes in both seamless and welded (ERW/LSAW) construction, with full PSL1 and PSL2 options for Qatar projects.
- API 5L Gr.B, X42, X52, X56, X60, X65, X70 PSL1/PSL2 — Line pipe for Qatar gas transmission & North Field gathering
- ASTM A106 Grade B & C — Seamless process pipe for Ras Laffan refineries and high-temp service
- ASTM A53 Gr.A & B — General service, water, steam, fire protection
- ASTM A333 Grade 1, 6 — Cryogenic service for Qatar LNG trains
- CS ERW Pipe — API 5L / ASTM A53 — Water injection, low-pressure gas lines
- Large Diameter LSAW/SSAW (20"–72") — Qatar trunk pipelines, offshore risers
2. Stainless Steel Pipes & Tubes
Superior corrosion resistance for Qatar's offshore, chemical, and high-temperature applications. All austenitic grades in seamless and welded construction with ASTM certification and EN 10204 3.1 MTC.
- SS 304 / 304L (S30400/S30403) — General industry, food processing, construction
- SS 316 / 316L (S31600/S31603) — Qatar offshore, marine, Ras Laffan chemical (superior chloride resistance)
- SS 317L (S31703) — Qatar acid environments, chemical plants
- SS 321 (S32100) — Ti-stabilised, high-temperature exhaust, refinery
- SS 347 / 347H (S34700) — Nb-stabilised, Qatar power generation, HP steam lines
- SS Instrumentation Tube (S30400/S31600) — Qatar instrumentation, hydraulics, heat exchangers
3. Duplex & Super Duplex Stainless Steel Pipes
Duplex and super duplex grades combine high tensile strength with outstanding corrosion resistance — the preferred choice for Qatar's offshore, subsea, and high-chloride environments. NACE MR0175 compliant for sour gas service.
| Grade | UNS No. | Standard | PREN | Sizes (NPS) | Wall Schedule | Tensile Strength | Qatar Application |
|---|---|---|---|---|---|---|---|
| Duplex 2205 | S31803/S32205 | ASTM A790/A928 | 35 | 1/2"–24" | SCH 10S–80S | 620 MPa min | Qatar seawater, Ras Laffan desalination, chemical |
| Super Duplex 2507 | S32750 | ASTM A790/A928 | 43 | 1/2"–16" | SCH 10S–80S | 795 MPa min | Qatar deep offshore, subsea, sour gas service |
| Super Duplex 255 (Ferralium) | S32550 | ASTM A790 | 41 | 1/2"–12" | SCH 10S–40S | 760 MPa min | FGD systems, marine, Qatar pump shafts |
4. Alloy Steel Pipes — High-Temperature & High-Pressure
Chrome-molybdenum alloy steel pipes for Qatar's power generation, refineries, HRSG, and Ras Laffan petrochemical plants. All grades seamless to ASTM A335.
| Grade | Composition (Cr-Mo) | Max Service Temp | Sizes (NPS) | Tensile Strength | Qatar Application |
|---|---|---|---|---|---|
| P1 | 0.5% Mo | 400°C / 752°F | 1/2"–24" | 415 MPa | Qatar boiler piping, utility steam |
| P5 / P5b / P5c | 5% Cr – 0.5% Mo | 620°C / 1148°F | 1/2"–24" | 415 MPa | Qatar hydro-cracker, reformer piping |
| P9 | 9% Cr – 1% Mo | 650°C / 1202°F | 1/2"–24" | 415 MPa | Qatar high-temp refinery, steam headers |
| P11 | 1.25% Cr – 0.5% Mo | 540°C / 1004°F | 1/2"–24" | 415 MPa | Qatar power plant boiler tubes, superheaters |
| P22 | 2.25% Cr – 1% Mo | 580°C / 1076°F | 1/2"–24" | 415 MPa | Qatar HRSG, heat exchangers, power generation |
| P91 | 9% Cr – 1% Mo – V/Nb | 650°C / 1202°F | 1/2"–24" | 585 MPa | Qatar ultra-supercritical power, HP steam |
5. Specialty, Nickel Alloy & Non-Metallic Pipes
Beyond traditional steel, Metinox Overseas supplies nickel alloys, HDPE, fibreglass GRE/GRP, copper, and cupro-nickel pipes for extreme-service and non-metallic applications across Qatar's energy and infrastructure sectors.
| Pipe Type | Material / Grade | Standard | Size Range | Key Advantages | Qatar Application |
|---|---|---|---|---|---|
| Nickel Alloy Pipe | Inconel 625, Hastelloy C276, Monel 400, Incoloy 825 | ASTM B165/B167 | 3/8"–12" | Extreme corrosion resistance, high-temp | Qatar acid gas, sour service, chemical processing |
| HDPE Pipe | PE 80 / PE 100 (Black) | ASTM D3035 | 1/2"–63" | Lightweight, corrosion-free, antimicrobial | Qatar water injection, produced water |
| Cupro-Nickel Pipe | Cu-Ni 70/30, 90/10 (C70600, C71500) | ASTM B466 | 1/2"–12" | Outstanding seawater corrosion resistance | Qatar seawater cooling, offshore condensers |
| Galvanised Steel Pipe | Carbon Steel + Hot-Dip Zinc | ASTM A53/A123 | 3/8"–8" | Corrosion protection, long service life | Qatar water service, fire protection, scaffolding |
Pipe Schedule & Wall Thickness Reference — Qatar Stock
Standard pipe schedule (wall thickness) designation for commonly ordered NPS sizes. All schedules available in Qatar stock. Contact Metinox Overseas for specific wall thickness requirements for your Qatar project.
| NPS | OD (in) | SCH 10 | SCH 20 | SCH 40 (STD) | SCH 80 (XS) | SCH 120 | SCH 160 | XXS |
|---|---|---|---|---|---|---|---|---|
| 3/4" | 1.050 | 0.083 | — | 0.113 | 0.154 | — | 0.219 | 0.308 |
| 1" | 1.315 | 0.109 | — | 0.133 | 0.179 | — | 0.250 | 0.358 |
| 2" | 2.375 | 0.109 | — | 0.154 | 0.218 | 0.344 | 0.344 | 0.436 |
| 3" | 3.500 | 0.120 | — | 0.216 | 0.300 | 0.438 | 0.438 | 0.600 |
| 4" | 4.500 | 0.120 | — | 0.237 | 0.337 | 0.438 | 0.531 | 0.674 |
| 6" | 6.625 | 0.134 | — | 0.280 | 0.432 | 0.562 | 0.719 | 0.864 |
| 8" | 8.625 | 0.148 | 0.250 | 0.322 | 0.500 | 0.594 | 0.719 | 0.875 |
| 10" | 10.75 | 0.165 | 0.250 | 0.365 | 0.500 | 0.594 | 0.719 | 1.000 |
| 12" | 12.75 | 0.180 | 0.250 | 0.406 | 0.500 | 0.688 | 0.844 | 1.000 |
Specifications of Pipes & Tubes
| Specification | Details |
|---|---|
| Size Range | 1/4" NPS to 72" NPS (Large Diameter on Request) |
| Wall Schedule | SCH 5S to XXS |
| Construction | Seamless · ERW · LSAW · SSAW · EFW |
| End Finish | Plain End (PE) · Bevelled End (BE) · TBE · TOE · Grooved |
| Carbon Steel | API 5L · ASTM A106 · ASTM A53 |
| Stainless Steel | ASTM A312 — 304L / 316L / 321 / 347 |
| Duplex / Super Duplex | ASTM A790 — 2205 / 2507 |
| Alloy Steel | ASTM A335 — P1 to P91 |
| Certifications | EN 10204 3.1 MTC · NACE MR0175 · ISO 15156 |
| Delivery | Same Week — Doha, Ras Laffan & Mesaieed |
| RFQ Response | Within 4 Business Hours |
Pipe Manufacturing Types We Supply
| Manufacturing Type | Description | Sizes Available | Qatar Application |
|---|---|---|---|
| Seamless (SMLS) | No weld seam, hot-extruded billet. Uniform strength, NACE MR0175 compliant. | 1/4"–24" | High-pressure process piping, North Field gas, sour service |
| ERW Welded | Electric Resistance Welded. Longitudinal seam. Cost-effective. | 2"–24" | Qatar water & gas lines, low-pressure utility |
| LSAW Large Diameter | Longitudinal Submerged Arc Welded. | 20"–72" | North Field trunk pipelines, offshore risers |
| SSAW Spiral Welded | Spiral Submerged Arc Welded. | 20"–100" | Water injection, low-pressure Qatar lines |
| EFW / SAW Welded | Electric Fusion Welded. Heavy-wall, large bore. | 24"–72" | Qatar high-pressure pipeline spools |
International Standards & Certifications
All pipes supplied by Metinox Overseas comply with the international standards required by QatarEnergy, Ras Laffan Industrial City operators, and Qatar EPC engineering specifications.
| Standard | Full Name | Scope & Qatar Relevance |
|---|---|---|
| API 5L | Specification for Line Pipe | Oil, gas & water transmission. Grades B through X70, PSL1/PSL2. Backbone of Qatar gas pipelines. |
| ASTM A106 | Seamless Carbon Steel Pipe — High Temp | Primary spec for Qatar refinery and petrochemical process piping. Grade B most common. |
| ASTM A312 | Seamless, Welded Austenitic Stainless Steel Pipes | Covers all 304, 316, 321, 317L, and 347 grades for Qatar corrosive service. |
| ASTM A790 | Ferritic/Austenitic Stainless Steel Pipe | Duplex 2205 (S31803) and super duplex 2507 (S32750) for Qatar offshore and sour service. |
| ASTM A335 | Seamless Ferritic Alloy-Steel Pipe — High Temp | Covers all Cr-Mo grades P1 through P91 for Qatar power and refinery. |
| ASME B36.10 | Welded and Seamless Wrought Steel Pipe | Primary dimensional standard for all NPS sizes and wall schedules for Qatar projects. |
| ASME B36.19 | Stainless Steel Pipe | Dimensional standard for stainless, duplex, and high-alloy pipes. Covers SS 5S, 10S, 40S, 80S. |
| NACE MR0175 / ISO 15156 | Materials for H2S Environments | Mandatory for Qatar North Field sour gas, offshore, and acid gas applications. |
| EN 10204 3.1 | Mill Test Certificate Standard | Full chemical/mechanical certification from approved manufacturer. Standard for all Qatar supply. |
Applications Across Qatar's Energy Sector
Metinox Overseas pipes and tubes supply Qatar's most critical oil & gas, petrochemical, power, and infrastructure projects.
| Industry / Sector | Pipe Types Used | Typical Products |
|---|---|---|
| Oil & Gas — Upstream Qatar | API 5L line pipe, NACE MR0175 sour service pipe | API 5L PSL2 X65/X70 seamless, 2205 duplex for wellhead connections, SMLS for North Field production facilities |
| Ras Laffan Refineries | ASTM A106 process pipe, alloy steel P5/P11/P22/P91 | ASTM A335 P91 seamless for hydrotreaters, CDU/VDU, reformers; A106B for general refinery service |
| Qatar EPC & Pipeline Projects | Bulk API 5L X52–X70 line pipe, large diameter LSAW/SSAW | Qatar trunk pipelines, compressor stations, metering facilities, pig launchers |
| Qatar Power Generation | Alloy steel ASTM A335 P91, stainless A312 | P22/P91 for boiler piping, superheaters, HRSG; A312 321H for turbine exhaust |
| Qatar Desalination & Water | Duplex 2205, HDPE, GRE/GRP | Duplex 2205 for MSF/RO desalination intake; HDPE for water injection; GRE for produced water lines |
| Qatar LNG Trains | ASTM A333 Grade 6, 9% Ni seamless | Cryogenic service down to -196°C for North Field LNG liquefaction trains |
| Offshore & Marine Qatar | Super duplex S32750, cupro-nickel, titanium | Topside piping, subsea flowlines, marine cooling systems for Qatar offshore platforms |
| Mesaieed Petrochemical | SS 316L, duplex, super duplex, nickel alloy | Acid lines, chloride reactors, HP chemical service for QAPCO, QAFAC |
| Qatar Construction & Infrastructure | Black steel, galvanised, ERW | Structural, fire protection, HVAC, gas distribution across Doha construction projects |
Value-Added Services for Qatar Projects
Metinox Overseas provides value-added services that reduce project preparation time and on-site labour costs for Qatar EPC contractors and operators.
| Service | Description | Qatar Benefit |
|---|---|---|
| Cutting & Bevelling | Cut-to-length and 30° weld-prep bevel to ASME B16.25 | Reduces on-site preparation and ensures correct weld fit-up for Qatar project installations |
| Heat Treatment | Normalising, annealing, stress relieving, and PWHT through approved partners | Enhances strength and corrosion resistance for Qatar critical service applications |
| Coating & Lining | External epoxy, FBE, 3LPE, and polyurethane coatings; internal cement mortar and epoxy linings | Essential for Qatar buried and submerged piping in corrosive soil and seawater environments |
| Threading (NPT/BSP) | NPT and BSP threading to ANSI/ASME B1.20.1 for small-bore Qatar instrumentation connections | TBE and TOE configurations available for Qatar utility and instrument piping |
| NDT & Inspection | Ultrasonic testing (UT), magnetic particle inspection (MPI), radiographic (RT), and hydrostatic testing | Through Qatar-approved inspection network — meets QatarEnergy EPC documentation requirements |
| PMI — Positive Material Identification | XRF-based PMI testing for alloy verification | Essential for stainless, duplex, and alloy pipes in Qatar sour service and chemical applications |
Metinox Overseas vs. Other Pipe Suppliers in Qatar
| Feature | Metinox Overseas | Typical Competitors |
|---|---|---|
| EN 10204 3.1 MTC | Standard on every item | Often extra cost or not available |
| NACE MR0175 Certified Stock | Yes — full sour service compliance | Limited grades or on-request only |
| RFQ Response Time | 4 business hours | 24–72 hours or longer |
| Delivery to Doha / Ras Laffan | Same week from stock | 2–4 weeks (import lead time) |
| Size Range | 1/4"–72" NPS full range | Typically limited to standard sizes |
| QatarEnergy AVL Support | Yes — pre-qualification assistance | Self-service or not offered |
| Third-Party Inspection | SGS / Bureau Veritas / Intertek | Limited or local only |
| Custom Cut-to-Length | Available from Doha stock | Factory minimum orders apply |
| Country of Origin Documentation | Full COO for Qatar customs | Not always available |
| Standards Coverage | 15+ API / ASTM / ASME / NACE / ISO / DIN | Typically 5–8 standards |
Pipes & Tubes Dimensions & Availability Chart
| NPS (NB) | Outside Diameter (mm) | Sch 10S (mm) | Sch 40S (mm) | Sch 80S (mm) | Availability |
|---|---|---|---|---|---|
| 1/2" | 21.3 | 2.11 | 2.77 | 3.73 | Seamless & Welded |
| 3/4" | 26.7 | 2.11 | 2.87 | 3.91 | Seamless & Welded |
| 1" | 33.4 | 2.77 | 3.38 | 4.55 | Seamless & Welded |
| 1-1/4" | 42.2 | 2.77 | 3.56 | 4.85 | Seamless & Welded |
| 1-1/2" | 48.3 | 2.77 | 3.68 | 5.08 | Seamless & Welded |
| 2" | 60.3 | 2.77 | 3.91 | 5.54 | Seamless & Welded |
| 2-1/2" | 73.0 | 3.05 | 5.16 | 7.01 | Seamless & Welded |
| 3" | 88.9 | 3.05 | 5.49 | 7.62 | Seamless & Welded |
| 4" | 114.3 | 3.05 | 6.02 | 8.56 | Seamless & Welded |
| 5" | 141.3 | 3.40 | 6.55 | 9.52 | Seamless & Welded |
| 6" | 168.3 | 3.40 | 7.11 | 10.97 | Seamless & Welded |
| 8" | 219.1 | 3.76 | 8.18 | 12.70 | Seamless & Welded |
| 10" | 273.1 | 4.19 | 9.27 | 12.70 | Seamless & Welded |
| 12" | 323.9 | 4.57 | 9.52 | 12.70 | Seamless & Welded |
| 14" | 355.6 | 4.78 | 11.13 | On Request | Welded |
| 16" | 406.4 | 4.78 | 12.70 | On Request | Welded |
| 18" | 457.2 | 4.78 | 14.27 | On Request | Welded |
| 20" | 508.0 | 4.78 | 15.09 | On Request | Welded |
| 24" | 609.6 | 6.35 | 17.48 | On Request | Welded |
| 30" | 762.0 | 7.92 | 19.05 | On Request | Welded |
Standard Supply Range: 1/2" NB to 30" NB • OD Range: 21.3 mm to 762 mm • Types: Seamless, Welded & ERW • Schedules: 10S, 40S, 80S and custom wall thicknesses available.
End Preparation, Lengths & Documentation
| Category | Option | Description |
|---|---|---|
| End Preparation | PE — Plain End | Cut square, no bevelling. For socket weld or threaded connections on Qatar instrument piping. |
| End Preparation | BE — Bevelled End | 30° bevel, 1.6mm root face per ASME B16.25. Standard for all Qatar butt weld applications. |
| End Preparation | TBE — Threaded Both Ends | NPT or BSP thread. For screwed fittings and small-bore Qatar utility systems. |
| End Preparation | TOE — Threaded One End | One end threaded, one plain end. |
| End Preparation | Grooved End | Victaulic/Gruvlok groove. Qatar fire protection, HVAC and utility systems. |
| Pipe Lengths | SRL — Single Random Length | 16–22 ft (4.8m–6.7m) per API 5L and ASTM standards. |
| Pipe Lengths | DRL — Double Random Length | 35–45 ft (10.7m–13.7m). Most common for Qatar bulk projects. |
| Pipe Lengths | Mill Length | Typically 5.8m, 6m, or 12m depending on product. |
| Pipe Lengths | Cut to Length | Custom cut lengths from Doha stock. Minimum order may apply. |
| Documentation | Mill Test Certificate (MTC) | Chemical composition, mechanical properties, heat number. EN 10204 3.1 standard. |
| Documentation | Material Test Report (MTR) | Full test results per heat per product. 3.1 and 3.2 available for QatarEnergy EPC requirements. |
| Documentation | Inspection Release Note (IRN) | Final inspection confirmation prior to despatch from Qatar or origin. |
| Documentation | Packing List / Delivery Note | Heat numbers, sizes, lengths, weights — per Qatar customs documentation requirements. |
Frequently Asked Questions (FAQ)
Metinox Overseas supplies pipes certified to all major international standards required by QatarEnergy and Ras Laffan Industrial City operators, including API 5L (Grades B through X70, PSL1 and PSL2), ASTM A106 Grade B, ASTM A53, ASTM A312 (stainless steel), ASTM A335 (alloy steel P1–P91), and ASME B36.10/B36.19. For QatarEnergy EPC contractor projects, we also supply to NACE MR0175/ISO 15156 for sour service. All products come with EN 10204 3.1 as standard, with 3.2 third-party inspection available.
Yes. Metinox Overseas maintains certified stock of NACE MR0175 / ISO 15156 compliant pipes for Qatar's H2S and sour service environments. This includes API 5L PSL2 seamless line pipe, ASTM A106 Grade B seamless process pipe, duplex stainless steel (2205 and 2507), and alloy steel Cr-Mo grades. Full NACE compliance documentation and material traceability are provided as standard.
Metinox Overseas delivers same-week to Doha, Ras Laffan Industrial City, and Mesaieed Petrochemical City from our Qatar stock. Our 4-hour RFQ response allows us to confirm pricing, stock availability, and delivery scheduling almost immediately. For urgent requirements, same-day despatch may be possible depending on size and grade.
Every pipe order from Metinox Overseas includes: EN 10204 3.1 Mill Test Certificate (MTC) covering full chemical composition and mechanical properties; Material Test Report (MTR) with heat number traceability; Inspection Release Note (IRN); and Packing List / Delivery Note compliant with Qatar customs documentation requirements. 3.2 certification by SGS, Bureau Veritas, or Intertek is available for QatarEnergy EPC requirements.
Yes. Metinox Overseas supplies API 5L X65 and X70 pipes in both PSL1 and PSL2 options in seamless (SMLS), ERW, and LSAW/SSAW construction for Qatar's high-pressure gas transmission pipelines, North Field gathering lines, and trunk pipelines. Sizes from 2" NPS to 72" NPS are available, with custom wall schedules for specific Qatar pipeline engineering requirements.
Ready to Order Pipes & Tubes for Qatar?
Metinox Overseas is Qatar's trusted supplier of certified carbon steel, stainless steel, duplex, alloy, and specialty pipes and tubes. Contact us today for pricing, stock confirmation, and same-week delivery to your Qatar project site.
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