Oil & Gas
Pipe Fittings
Supplier India
ASME B16.9 · ASME B16.11 · MSS SP-75 certified elbows, tees, reducers, caps, crosses & couplings in carbon steel, stainless steel, alloy steel & duplex. Butt-weld, socket weld & threaded ends. Sizes ½″ to 72″. Full MTC documentation. PAN India delivery.
What Are Pipe Fittings?
Pipe fittings are essential components that connect, redirect, branch, reduce or terminate piping systems in oil & gas, refinery, petrochemical and industrial applications. Every change of direction, branch connection, pipe size transition or line termination in a piping system requires a fitting — making them among the highest-volume items in any project's Material Take Off (MTO).
At Petropipe Oil & Gas, we supply a comprehensive range of ASME B16.9, ASME B16.11 & MSS SP-75 certified fittings — butt-weld (BW), socket weld (SW) and threaded (THD) ends — in carbon steel, stainless steel, alloy steel, duplex & super-duplex grades. All fittings are manufactured from seamless or welded pipe/plate material and supplied with full Mill Test Certificate (MTC) traceability.
We serve EPC contractors, procurement teams & plant maintenance departments across India — from ONGC & IOCL to private refineries & fertilizer plants. Express PAN India delivery from our Noida, Gujarat & Mumbai warehousing hubs.
Butt-Weld (BW)
ASME B16.9 — for large bore ≥½″, high-pressure & permanent piping systems.
Socket Weld (SW)
ASME B16.11 — for small bore ½″–4″, high-pressure utility & process piping.
Threaded (THD)
ASME B16.11 — NPT/BSPT threaded for low-pressure, non-welded & temp installations.
Full MTC Traceability
Heat number, chemical & mechanical test reports, NDT results on every supply.
Butt Weld
Full penetration weld — strongest joint, flush bore for smooth flow. Per ASME B16.9 for ½″ and above. Preferred for all high-pressure refinery & pipeline service.
Socket Weld
Pipe inserted into socket bore and fillet-welded externally. Per ASME B16.11 for ½″–4″. Used for small-bore utility, chemical injection & instrument piping.
Threaded (NPT)
NPT or BSPT threaded for screwed connections — no welding. Per ASME B16.11. For low-pressure air, water, instrumentation & temporary installations.
Combined Ends
Many fittings are available with mixed ends — e.g. BW one side, SW or THD other side for transition connections between pipe schedules or fitting types in the same piping system.
Types of Pipe Fittings We Supply
Elbows to end caps, tees to crosses — every certified fitting for every flow configuration in your oil & gas piping system.
Elbows
Direction Change90°, 45° & 180° (return bend) elbows in long radius (LR = 1.5D) & short radius (SR = 1D) configurations. LR elbows preferred for lower pressure drop; SR for compact layouts. Also available: reducing elbows for combined direction change & size reduction. BW, SW & threaded ends.
Tees
Branch ConnectionEqual tees (same run & branch diameter) & reducing tees (reduced branch size) for branching pipelines. Used at header branch connections, take-off points & manifold systems. Also available: lateral tees (45° branch angle) for lower turbulence in high-velocity gas lines.
Reducers
Size TransitionConcentric reducers (centreline maintained — used in vertical piping) and eccentric reducers (flat bottom or top — used in horizontal pump suction lines to prevent air pockets). Available for all standard NPS combinations. Gradual transition minimises turbulence and pressure loss.
Pipe Caps
End ClosureHemispherical or flat end caps butt-welded to the pipe end for permanent or temporary closure of a line. Used for pipeline hydrostatic testing, future tie-in points & termination of dead-end lines. Available in all wall schedules including heavy wall for high-pressure service.
Crosses (4-Way)
Four-Way BranchFour-port cross fittings for manifold headers, utility distribution & fire-fighting piping systems requiring branching in four directions from a single fitting. Equal crosses (all same bore) and reducing crosses (reduced branches) available. Note: use with caution in high-cycle pressure systems due to stress concentration.
Couplings & Half-Couplings
Pipe Extension / BranchFull couplings join two pipe sections of the same diameter (SW or THD). Half-couplings (sockolets/threadolets) are welded to a header pipe for a small-bore branch connection. Available in reducing coupling versions for two different pipe diameters. Essential for instrument nozzles & drain connections.
Branch Outlet Fittings (Olets)
Integrally Reinforced BranchWeldolet (BW branch), Sockolet (SW branch), Threadolet (THD branch), Elbolet (on elbow), Latrolet (45° lateral branch) and Nipolet (nipple with olet). Integrally reinforced — no separate reinforcement pad required. Preferred over fabricated tees for small-bore branch connections in high-pressure refinery piping.
Unions
Maintenance / Disconnectable JointThree-piece fittings (two end fittings + a nut) that allow piping to be disconnected without cutting — essential at equipment connections, pump flanges & anywhere dismantling for maintenance is needed. Available in SW & THD ends, with conical metal or flat gasket seats. ASME B16.11 Class 3000 & 6000.
Stub Ends
Lap Joint PartnerShort butt-welded pipe sections with a flanged collar, used with lap joint flanges. The stub end carries the pressure and is made of the expensive alloy material; the backing flange can be cheaper carbon steel — reducing cost in systems with alloy pipe. Type A (long pattern) & Type B (short) available.
Elbow Types & When to Use Them
Selecting the correct elbow type and radius affects pressure drop, flow velocity, space requirements and system integrity.
90° Long Radius (LR) Elbow
Most common — centreline radius = 1.5 × NPS. Gentle curve reduces pressure drop and erosion. Standard for process piping, oil & gas lines per ASME B31.3. Preferred where space permits.
90° Short Radius (SR) Elbow
Centreline radius = 1.0 × NPS. Sharper turn for compact layouts where space is restricted — offshore platforms, congested plant areas. Higher pressure drop vs. LR; not recommended for slurry or pig-able lines.
45° Long Radius Elbow
Half the turn of a 90° LR — used in pairs to create a 90° offset with lower pressure drop than a single 90° elbow. Ideal for slurry, abrasive & high-velocity fluid services. Common in pump suction piping layouts.
180° Return Bend
Full U-turn fitting — used in heat exchangers, tube bundles, fin-fan air coolers & multi-pass process equipment where flow reversal is needed. Available in LR & SR configurations, BW ends.
Reducer Selection Guide
Choosing between concentric and eccentric reducers is critical for system performance — especially at pump suctions.
Concentric Reducer
Centrelines of both ends are aligned. Used in vertical piping and where symmetrical flow transition is required — gas lines, vertical headers & balanced flow systems.
Eccentric Reducer (Flat Bottom)
One side flat — used at pump suctions in horizontal piping to prevent air pockets accumulating at the top of the pipe, which would cause cavitation. Also used at pipe racks for uniform bottom support elevation.
Reducer vs. Swaged Nipple
Reducers are BW only for ≥2″ transitions. For SW or THD small bore size reduction (½″–4″), use swaged nipples (swages) or reducing couplings per ASME B16.11.
Key Ordering Information
Always specify: larger bore × smaller bore (e.g. 12″ × 8″), concentric or eccentric, wall schedule of both ends, material grade (A234 WPB, A403 WP316L), and standard (ASME B16.9).
Pipe Fittings Specifications & Standards
Complete specifications for all fitting types — material grades, size ranges, end connections and applicable certification standards.
| Fitting Type | End Connection | Material Grade | Size Range | Schedule | Key Use | Standard |
|---|---|---|---|---|---|---|
| 90° LR / SR Elbow | Butt Weld (BW) | WPB / WP316L / WP11 / WP22 | ½″ – 72″ | SCH 10–XXH | Direction change, process piping | ASME B16.9 |
| 45° Elbow | BW | WPB / WP316L / WPS31803 | ½″ – 48″ | SCH 10–XXH | Shallow direction change, slurry | ASME B16.9 |
| Equal / Reducing Tee | BW | WPB / WP304L / WP9 / Duplex | ½″ – 72″ | SCH 10–XXH | Branch connections, headers | ASME B16.9 |
| Concentric Reducer | BW | WPB / WP316 / WP5 | ½″ – 72″ | Matching SCH | Vertical piping, gas lines | ASME B16.9 |
| Eccentric Reducer | BW | WPB / WP316L / WP91 | ½″ – 72″ | Matching SCH | Pump suctions, pipe racks | ASME B16.9 |
| End Cap | BW | WPB / WP316 / WP9 / WPS32750 | ½″ – 48″ | SCH 10–XXH | Line termination, hydro test | ASME B16.9 |
| SW Elbow / Tee | Socket Weld | A105 / A182 F316 / F11 | ½″ – 4″ | Class 3000 / 6000 | Small bore process & utility | ASME B16.11 |
| THD Elbow / Tee | Threaded NPT | A105 / A182 F304 | ⅛″ – 4″ | Class 2000 / 3000 | Low-pressure air, water, instrument | ASME B16.11 |
| Weldolet / Sockolet | BW / SW branch | A105 / A182 F316 / F9 | ½″ – 24″ branch | SCH matching run | Reinforced branch outlet | MSS SP-97 |
| Union | SW / THD | A105 / A182 F316 | ½″ – 4″ | Class 3000 / 6000 | Disconnectable maintenance joints | MSS SP-83 |
Pipe Fittings Manufacturing Processes
Quality pipe fittings are produced through specific forming methods that preserve material integrity under high-pressure service conditions.
Hot Forming (Seamless Pipe)
The primary manufacturing method for BW fittings. Seamless pipe is hot-formed — heated and die-pressed or mandrel-pulled into elbow and tee shapes. Preserves the continuous grain structure of the parent material, producing fittings with uniform wall thickness, excellent mechanical properties and no weld seams. Mandatory for high-pressure Class 600+ service and critical process piping.
Forging (Small Bore SW/THD)
Socket weld and threaded fittings (½″–4″) are hot-forged from bar or billet stock. The forging process produces excellent strength-to-weight ratio and tight dimensional tolerances required for socket & thread machining. ASTM A105 for carbon steel; ASTM A182 for stainless and alloy steel grades. Pressure ratings Class 2000 to Class 9000.
Fabrication (Large Diameter / Special)
For large-diameter fittings above NPS 24 or special geometries — plates or pipe sections are cut, rolled and welded (submerged arc welding) into tee and elbow shapes. Subject to mandatory radiographic (RT) and ultrasonic (UT) weld inspection per ASME B16.9 quality requirements. NDT reports supplied with every fitting.
Where Our Pipe Fittings Are Used
Petropipe fittings route, branch and terminate piping across every sector of India's energy & industrial landscape.
Refineries & Petrochemicals
ASME B16.9 BW elbows, tees & reducers in A234 WPB, A403 WP316L & A234 WP11/WP22 for process units — CDU, VDU, FCCU, Hydrocracker, HDS & amine treating systems in IOCL, HPCL, BPCL, Reliance & Nayara refineries.
Cross-Country Pipelines
API 5L / MSS SP-75 WPL6/WPL52 large-diameter BW fittings for GAIL, GSPL & IOCL natural gas & crude oil trunk lines. Elbows for route changes, tees for off-takes & reducers for pressure/velocity management across pipeline stations.
Offshore & LNG
Duplex SS (A815 WPS31803) & super-duplex (WPS32750) BW fittings for offshore topside process piping, LNG terminals & FSRU applications. NACE MR0175 & cryogenic-rated grades available with charpy impact test at –196°C.
Power Generation
IBR-approved ASTM A234 WP11/WP22/WP91 BW fittings for main steam, hot reheat & HP feed water piping in NTPC, Adani Power & Tata Power supercritical thermal power plants. Certified with IBR Form III-C & MTC.
Fertilizers & Chemicals
ASTM A403 WP316L/TP304L stainless BW fittings & A182 F316L SW fittings for ammonia, urea, nitric acid & phosphoric acid piping at RCF, IFFCO, GNFC & KRIBHCO fertilizer plants. NACE compliant for H₂S service.
Upstream E&P & Instrumentation
A105 & A182 F316L SW/THD elbows, tees, unions & couplings for small-bore instrument leads, chemical injection lines, sample connections & utility piping on ONGC platforms, oil fields & gas processing facilities.
Pipe Fittings Material Grades
We supply fittings in all standard and specialty material grades — matching your pipe specification for full system compatibility.
Carbon Steel
ASTM A234 WPB · WPC · A860 WPHYStandard for most oil & gas service up to 425°C. WPB for general service, WPC for higher yield. A860 WPHY52/60/65/70 for high-pressure pipeline fittings matching API 5L pipe grades.
Stainless Steel
ASTM A403 WP304/304L · WP316/316L · WP321For corrosive, cryogenic & food-grade service. WP316L low-carbon for direct-welded systems without PWHT. WP321 titanium-stabilised for high-temp. WPS31803 (Duplex 2205) for offshore & NACE service.
Alloy Steel
ASTM A234 WP1 · WP5 · WP9 · WP11 · WP22 · WP91Chrome-moly fittings for high-temperature service in power plants & refineries. WP91 (9Cr-1Mo-V) for ultra-supercritical steam lines up to 620°C. IBR-approved in India. Full PWHT heat treatment traceability provided.
Duplex / Special Alloys
A815 WPS31803 · WPS32750 · Hastelloy · InconelDuplex (UNS S31803) for offshore & sour gas. Super-duplex (S32750) for the most aggressive environments. Nickel alloys (Hastelloy C276, Inconel 625) for extreme corrosion in chemical plants. Full NACE MR0175 compliance.
Certifications & Standards
All Petropipe fittings are inspected, tested and fully documented to international and Indian oil & gas standards.
ASME B16.9 — BW Fittings
Factory-made wrought butt-welding fittings — the primary standard for BW elbows, tees, reducers and caps. Covers dimensional requirements, wall thickness, tolerances and marking for NPS ½″ to 72″.
ASME B16.11 — SW & THD Fittings
Forged fittings — socket weld and threaded. Covers Class 2000, 3000 & 6000 pressure ratings for ½″ to 4″. Dimensional standards for elbows, tees, couplings, half-couplings, unions and crosses.
MSS SP-75 — Pipeline Fittings
Specification for high-test wrought butt-welding fittings for pipeline service — WPHY grades (42, 46, 52, 56, 60, 65, 70). Used with API 5L X42–X70 pipe for cross-country natural gas & crude oil transmission lines.
MSS SP-97 — Olet Fittings
Integrally reinforced branch outlet fittings — weldolets, sockolets, threadolets, elbolets & latrolets. Covers dimensions, testing & marking requirements. Eliminates need for reinforcement pads on branch connections.
IBR — Indian Boiler Regulations
IBR-approved BW elbows, tees & reducers in WP11/WP22/WP91 alloy steel for steam service, superheaters & boiler feed water systems in India. IBR Form III-C issued. Mandatory for NTPC, BHEL & thermal power projects.
NACE MR0175 / ISO 15156
Sour service material requirements for fittings exposed to H₂S environments. Controls hardness (≤22 HRC for CS), material qualification & test documentation. Mandatory for ONGC sour gas fields & offshore platform piping.
Why Choose Petropipe for Pipe Fittings?
Procurement engineers across India choose Petropipe for fittings supply because we deliver every fitting type, every material grade — correctly documented and on time.
MTO-Based Supply
Send us your piping isometrics or MTO spreadsheet — we process every line item, verify material grades & standards, and provide a comprehensive quotation with availability and delivery schedule within 48 hours.
Full Test Certification
Every fitting supplied with MTC, chemical & mechanical test reports, NDE results (RT/UT/MT/PT where applicable) and dimensional inspection records — ensuring full traceability for your QA dossier.
Isometric-Tagged Kitting
Fittings can be supplied pre-tagged by isometric drawing number and spool reference — reducing site handling time and enabling direct isometric-to-installation workflow for EPC projects across India.
PAN India Delivery
Standard BW & SW fittings in carbon steel dispatched within 24–48 hours from Noida, Gujarat & Mumbai. Alloy & duplex grades sourced with expedited lead times. Door-to-fabrication shop delivery available.
Technical Consultation
Our engineers review your P&ID and isometric requirements — confirming correct fitting selection, wall schedule matching, PWHT requirements, and code compliance with ASME B31.3 / IBR / OISD standards.
Get Fittings Quote
Response within 2 business hours. MTO upload welcome.
Pipe Fittings Maintenance Best Practices
Proper inspection and maintenance of pipe fittings prevents failures, extends system life and ensures PESO & OISD regulatory compliance.
Weld Inspection
Schedule periodic visual & NDT inspection of field welds at fitting connections — magnetic particle (MT) for CS, dye penetrant (PT) for SS. UT thickness scanning at elbow outer radius (highest erosion zone) during turnarounds per ASME B31.3 inspection requirements.
Wall Thickness Monitoring
Elbows in slurry, erosive & high-velocity service experience accelerated wall thinning at the outer radius. Install UT monitoring points (CML — Corrosion Monitoring Locations) at elbow extrados and measure at each inspection interval. Retire fittings below minimum calculated thickness.
SW & THD Joint Care
For socket weld joints, ensure a 1/16″ gap between pipe end and socket bottom before welding to allow thermal expansion. For threaded joints, apply PTFE tape or pipe-thread sealant compound and confirm thread engagement depth. Retighten after first heat cycle on new piping systems.
Corrosion & Coating
Apply epoxy primer and polyurethane topcoat to CS fittings in corrosive atmospheres. For buried fittings, use field-applied heat-shrink sleeves or cold-applied tape wrap to match pipe coating system continuity. Inspect coating at each scheduled plant inspection per OISD guidelines.
Complete Your Piping System
Fittings work with pipes, flanges, valves and gaskets — source your entire piping MTO from Petropipe as a single vendor.
Pipes
API 5L, ASTM A106 seamless & welded pipes. ½″ to 72″, all grades & schedules.
Flanges
ASME B16.5 weld neck, slip-on, blind & socket weld flanges. Class 150–2500.
Industrial Valves
API 600/6D gate, ball, globe, check & butterfly valves. Class 150–2500.
Gaskets & Fasteners
RTJ, SWG, full-face gaskets & A193 B7 stud bolts for all flange classes.
Ready to Source Your Pipe Fittings Requirements?
Send us your MTO or isometric list — get competitive quotes for ASME B16.9 BW elbows, tees, reducers & all fittings with full MTC documentation and PAN India delivery.