ASME B16.9 butt weld, ASME B16.11 forged, socket weld, threaded and branch fittings in carbon steel, stainless steel, duplex and alloy steel. In stock Doha — same-week delivery to Ras Laffan, Mesaieed and all Qatar project sites.
Valiol Trading supplies the complete range of industrial pipe fittings from our Doha base in Qatar. Whether your project requires standard ASTM A234 WPB carbon steel butt weld fittings in schedule 40, or high-alloy super duplex socket weld fittings in Class 3000 for offshore sour service — we source, certify, and deliver exactly to your specification.
Our fittings range covers every connection type — butt weld, socket weld, threaded (NPT/BSP), grooved, and branch fittings (olets) — across the full size and pressure class spectrum required by QatarEnergy EPC contractors, Ras Laffan industrial city operators, and offshore rig supply projects.
Every pipe fitting type used in Qatar's oil & gas, construction, and industrial projects — from standard butt weld elbows to exotic alloy branch fittings for high-pressure QatarEnergy specifications.
The primary fitting type for large-bore, high-pressure piping in Qatar's oil & gas systems. Welded directly into the pipeline — no flanges, no threaded joints. Maximum pressure integrity and cleanability for gas transmission and process piping.
High-strength fittings for small-bore, high-pressure Qatar applications. Manufactured from solid forged bar — no casting porosity. Available in socket weld and threaded (NPT) ends. Ideal for instrument connections and utility piping at Ras Laffan.
The pipe end inserts into a socket before fillet welding. Preferred for NPS ½″ to 2″ high-pressure, leak-free instrument and process piping connections on Qatar offshore platforms and Ras Laffan petrochemical plants.
NPT and BSP threaded fittings for small-bore, low-to-medium pressure applications, utility piping, and instrument connections. No welding required — fast installation and easy maintenance on Qatar EPC project sites.
Victaulic-style roll-grooved mechanical couplings — no welding required. Fast installation for Qatar fire protection, HVAC, cooling water, and utility systems. CS, ductile iron, and stainless steel available in stock.
Weldolets, sockolets, thredolets, nippolets, latrolets, elbolets and sweepolets for direct branch connections into header pipe. MSS SP-97. All alloys available for Qatar sour service and North Field gas specifications.
R=1.5D · 45° also avail.
U-Bend, LR & SR
Straight & reducing
Eccentric also avail.
Seamless & welded
MSS SP-97 branch fittings
Detailed specification tables for every fitting category stocked in Qatar. All products available with full MTC 3.1 documentation, third-party inspection, and same-week Qatar delivery. Contact us for current stock availability and pricing.
ASME B16.9 butt weld fittings are the preferred connection method for NPS 2″ and above in Qatar's oil & gas, refinery, and high-pressure piping systems. Available seamless and welded in all schedules.
| Fitting Type | Standard | Size Range (NPS) | Wall Schedule | Radius / Type | End Prep | Construction | Qatar Application |
|---|---|---|---|---|---|---|---|
| 90° Long Radius Elbow (LR) | ASME B16.9 | ½″ – 72″ | SCH 10 – XXS | R = 1.5D | Bevel End (BW) | Seamless / Welded | Gas transmission, Ras Laffan process piping |
| 45° Long Radius Elbow (LR) | ASME B16.9 | ½″ – 72″ | SCH 10 – XXS | R = 1.5D | Bevel End (BW) | Seamless / Welded | Angled branch, North Field pipeline connections |
| 90° Short Radius Elbow (SR) | ASME B16.28 | ½″ – 24″ | SCH 40 – XXS | R = 1.0D | Bevel End (BW) | Seamless / Welded | Tight spaces, offshore platform piping |
| 180° Return Bend (LR) | ASME B16.9 | ½″ – 24″ | SCH 40 – 160 | R = 1.5D / 1.0D SR | Bevel End (BW) | Seamless | U-bends, heat exchangers, compact loops |
| Equal Tee (Straight Tee) | ASME B16.9 | ½″ – 72″ | SCH 10 – XXS | Equal run & branch | Bevel End (BW) | Seamless / Welded | Header branch take-offs, QatarEnergy piping |
| Reducing Tee | ASME B16.9 | ¾″ – 48″ run | SCH 40 – 160 | Specify run × branch | Bevel End (BW) | Seamless / Welded | Reduced branch from main header |
| Concentric Reducer | ASME B16.9 | ¾×½″ – 48×16″ | SCH 20 – XXS | Concentric (CL aligned) | Bevel End (BW) | Seamless / Welded | Vertical piping, gas service, upward flow |
| Eccentric Reducer | ASME B16.9 | ¾×½″ – 48×16″ | SCH 20 – XXS | Eccentric (flat bottom/top) | Bevel End (BW) | Seamless / Welded | Pump suction, avoids air pockets — Qatar refineries |
| End Cap (Pipe Cap) | ASME B16.9 | ½″ – 72″ | SCH 10 – XXS | Dished / Flat | Bevel End (BW) | Seamless / Welded | Pipeline termination, pressure test blind-offs |
| Stub End (Lap Joint) | ASME B16.9 Type A&B | ½″ – 24″ | SCH 10 – 80 | Type A (long) / Type B (short) | Plain End (PE) | Seamless / Welded | Lap joint flanges, dissimilar metal connections |
ASME B16.11 forged fittings for small-bore high-pressure applications at Qatar EPC and Ras Laffan instrument and process piping installations. Available in carbon steel, stainless steel, and duplex.
| Fitting Type | Standard | End Connection | Size Range | Pressure Class | Material Grades | Application |
|---|---|---|---|---|---|---|
| SW 90° Elbow | ASME B16.11 | Socket Weld | ½″ – 4″ | 3000 / 6000 | A105N, A182 F316L, F11 | HP process piping, instrument loops |
| SW 45° Elbow | ASME B16.11 | Socket Weld | ½″ – 4″ | 3000 / 6000 | A105N, A182 F316L | Angled connections in tight spaces |
| SW Equal Tee | ASME B16.11 | Socket Weld | ½″ – 4″ | 3000 / 6000 | A105N, A182 F316L, F51 | Small-bore branch take-offs Qatar |
| SW Coupling (Full/Half) | ASME B16.11 | Socket Weld | ½″ – 4″ | 3000 / 6000 | A105N, A182 F316L | Straight unions in instrument piping |
| THD 90° Elbow (NPT) | ASME B16.11 | Threaded NPT | ⅛″ – 4″ | 2000 / 3000 / 6000 | A105N, A182 F316, F11 | Screwed utility connections, no-weld zones |
| THD Equal Tee (NPT) | ASME B16.11 | Threaded NPT | ⅛″ – 4″ | 2000 / 3000 / 6000 | A105N, A182 F316 | Instrument taps, vent & drain connections |
| THD Coupling (Full/Half) | ASME B16.11 | Threaded NPT | ⅛″ – 4″ | 2000 / 3000 / 6000 | A105N, A182 F316, F11 | Screwed pipe extensions & unions |
| THD Cross (4-Way) | ASME B16.11 | Threaded NPT | ⅛″ – 2″ | 3000 / 6000 | A105N, A182 F316 | Instrument manifold connections |
| THD Plug & Bushing | ASME B16.11 | Male/Female NPT | ⅛″ – 4″ | 2000 / 3000 | A105N, A182 F316 | Reducing adaptors in threaded connections |
Branch connection fittings (olets, MSS SP-97) create branch connections directly into the header pipe wall — eliminating the need for a reducing tee. Used extensively on Qatar gas transmission pipelines and Ras Laffan process piping.
| Olet Type | Standard | Branch End | Header Size | Branch Size | Pressure Class | Materials | Application |
|---|---|---|---|---|---|---|---|
| Weldolet | MSS SP-97 | Butt Weld (BW) | 2″ – 72″ | ½″ – 24″ | 3000 / 6000 / 9000 | A105N, A182 F316, F11, F22, F51, F53 | HP BW branch off large Qatar headers |
| Sockolet | MSS SP-97 | Socket Weld (SW) | 2″ – 24″ | ½″ – 2″ | 3000 / 6000 | A105N, A182 F316, F11, F22 | HP SW branch from medium/large headers |
| Thredolet | MSS SP-97 | Threaded NPT | 2″ – 24″ | ⅛″ – 2″ | 3000 / 6000 | A105N, A182 F316, F11 | Threaded branch for instruments, gauges |
| Latrolet (45°) | MSS SP-97 | BW / SW / THD | 2″ – 24″ | ½″ – 4″ | 3000 / 6000 | A105N, A182 F316, F11 | 45° branch — flow optimisation Qatar gas lines |
| Elbolet | MSS SP-97 | BW / SW / THD | On 90° LR elbows | ½″ – 4″ | 3000 / 6000 | A105N, A182 F316, F11 | Branch take-off from elbow body |
| Sweepolet (Contour) | MSS SP-97 | Butt Weld (BW) | 4″ – 48″ | 1″ – 16″ | Per calculation | A105N, A182 F316, F51, F53 | Low-turbulence branch — Qatar pigging systems |
The material grade must match the pipe and service conditions at your Qatar project site. All grades below are stocked in Doha and supplied with EN 10204 3.1 MTC.
Standard grade for general Qatar oil & gas process piping. Most widely used material for butt weld and forged fittings across Ras Laffan and Doha projects.
Austenitic stainless steel for corrosive process services, food-grade, and offshore Qatar applications. Available in ASME B16.9 and B16.11 from Doha stock.
High-strength, corrosion-resistant duplex grades for Qatar sour gas service, seawater piping, and offshore installations. NACE MR0175 compliant.
Chromium-molybdenum alloy steels for high-temperature, high-pressure Qatar power plant and refinery service — HP steam, HRSG, and North Field compression systems.
Impact-tested fittings for cryogenic and LNG service at Qatar's North Field LNG trains and cold utility systems. ASTM A420 WPL6 for –46°C service.
High-performance alloys for Qatar's most aggressive service environments — sour gas, H₂S, seawater, and high-temperature process applications offshore.
All fittings supplied by Valiol Trading conform to the international standards required by QatarEnergy, Ras Laffan operators, and Qatar EPC engineering specifications.
Factory-Made Wrought Buttwelding Fittings — the primary standard for BW fittings ½″ to 72″ on Qatar piping
Forged Fittings, Socket-Welding and Threaded — Class 3000/6000/9000 for small-bore Qatar instrument piping
Short Radius Elbows and Returns — R=1.0D for tight-radius connections on Qatar offshore platforms
Integrally Reinforced Branch Connection Fittings (Weldolets, Sockolets) — Qatar gas header branch connections
Piping Fittings of Wrought Carbon and Alloy Steel — WPB, WP11, WP22, WP91 for Qatar process piping
Wrought Austenitic Stainless Steel Piping Fittings — WP304L, WP316L for Qatar corrosive service
Wrought Ferritic, Ferritic/Austenitic and Martensitic Stainless Steel Fittings — Duplex for Qatar sour service
Materials for H₂S sour service — mandatory for Qatar North Field and offshore sour gas environments
Valiol Trading's pipe fittings are used on Qatar's most critical oil & gas, petrochemical, and infrastructure projects.
Offshore platform piping & Qatar onshore rig installations
Petrochemical plants & QatarEnergy EPC contractor supply
North Field & gas transmission pipeline systems across Qatar
Mesaieed refinery process & utility piping systems
Cryogenic fittings for North Field LNG expansion projects
Alloy steel fittings for HP steam & power plant piping
Questions from Qatar-based engineers and procurement teams about our pipe fittings range.
Ask Our Engineers →
API 5L, ASTM A106, A312 — seamless & ERW. Qatar gas & oil pipeline stock.
View Pipes
ASME B16.5, API 6A — WN, SO, BL, RTJ. Class 150–2500. Doha stock.
View FlangesGate, ball, globe, check, butterfly. API 6D / API 600. Class 150–2500 Qatar stock.
View ValvesI-beams, hollow sections, angles & plates. S275/S355, ASTM A36. Qatar stock.
View Structural Steel