Weldolets Manufacturer, Stockist & Supplier
Product Overview
Sagiant Piping Industries manufactures weldolets (butt-weld branch outlets) in carbon steel, low-temperature steel, alloy steel, stainless steel, duplex and nickel alloys to MSS SP-97. A weldolet provides an integrally reinforced 90° butt-weld branch connection from a run pipe, with a contoured base matched to the run OD, in run sizes 1/2" to 60" and branch 1/2" to 24" and schedules to match the line, with EN 10204 3.1/3.2 certificates, PMI, NDT and IGC testing.
Weldolets — butt-weld branch outlets, grades and standards
Weldolets in every grade — reinforced butt-weld branch design, run/branch sizing, standards and mechanical data.
Technical Specification
| Parameter | Specification |
|---|---|
| Type | Weldolet (butt-weld branch outlet, self-reinforced) |
| Materials | Carbon, low-temp, alloy, stainless, duplex, nickel |
| Run Size | 1/2" – 60" (NPS) |
| Branch Size | 1/2" – 24" (NPS) |
| Schedules | Std, XS, Sch 160, XXS (matched to branch) |
| Testing & Docs | PMI, UT/MPI/DPT, IGC, MTC EN 10204 3.1/3.2, TPI |
Manufacturing Process & Process Notes
Weldolets are closed-die forged with a contoured base (saddle) profiled to the run-pipe OD, giving an integrally reinforced branch connection per MSS SP-97 that eliminates the need for a reinforcing pad. The base is butt or fillet welded to the run pipe and the branch end is bevelled (B16.25) for butt welding the branch pipe.
Grades & Materials Supplied
| Material Family | Forged Grades (full list) | Applicable Standard | Service / Notes |
|---|---|---|---|
| Carbon steel | A105, A105N | ASME B16.11 / A105 | General forged fittings |
| Carbon steel (low-temp) | A350 LF2, LF3, LF6 | ASME B16.11 / A350 | Low-temperature service |
| Alloy steel (Cr-Mo) | A182 F1, F5, F9, F11, F12, F22, F91, F92 | ASME B16.11 / A182 | High-temperature & creep service |
| Stainless (austenitic) | A182 F304, 304L, 304H, 309, 310, 316, 316L, 316H, 317, 317L, 321, 321H, 347, 347H | ASME B16.11 / A182 | Corrosion & high-temperature service |
| Duplex / super duplex | A182 F51 (2205), F60, F53 (2507), F55, F44, F50 | ASME B16.11 / A182 | Chloride, sour & high-strength service |
| Nickel / Monel | B564 N02200 (Ni 200), N04400 (Monel 400) | ASME B16.11 / B564 | Caustic & marine service |
| Inconel / Incoloy | B564 N06600 (600), N06625 (625), N08800/08810 (Incoloy 800/800H), N08825 (825) | ASME B16.11 / B564 | High-temperature & severe corrosion |
| Hastelloy / Alloy 20 | B564 N10276 (C-276), N06022 (C-22), N08020 (Alloy 20) | ASME B16.11 / B564 | Aggressive acid & chemical service |
Standards & Specifications
| Scope | Applicable Standards |
|---|---|
| Branch connection | MSS SP-97 |
| Bevel | ASME B16.25 |
| Welding | ASME B31.3 |
| Material | ASTM A105, A350, A182, B564 |
| Sour service | NACE MR0175 / ISO 15156 |
Mechanical Properties (representative grades)
| Grade | Tensile (MPa, min) | Yield (MPa, min) | Elong (%, min) | Notes |
|---|---|---|---|---|
| A234 WPB | 415–585 | 240 | 22 | Carbon steel |
| A234 WPC | 485–655 | 275 | 20 | Carbon steel (higher strength) |
| A420 WPL6 | 415–585 | 240 | 22 | Low-temp, charpy at -46°C |
| A234 WP11 Cl.1 | 415–585 | 205 | 22 | 1¼Cr-½Mo alloy |
| A234 WP22 Cl.1 | 415–585 | 205 | 22 | 2¼Cr-1Mo alloy |
| A234 WP91 | 585–760 | 415 | 20 | 9Cr-1Mo-V alloy |
| A403 WP304/304L | 485 / 485 | 205 / 170 | 35 | Austenitic stainless |
| A403 WP316/316L | 485 / 485 | 205 / 170 | 35 | Mo-bearing stainless |
| A815 WPS31803 (2205) | 620 | 450 | 25 | Duplex |
| A815 WPS32750 (2507) | 795 | 550 | 15 | Super duplex |
| B366 WPNCI 625 | 760 | 345 | 30 | Inconel 625 |
| B366 WPHC276 | 690 | 283 | 40 | Hastelloy C-276 |
Testing, Inspection & Documentation
| Test / Document | Detail |
|---|---|
| PMI | Positive material identification on alloy, stainless & nickel grades |
| NDT | UT, RT, MPI/DPT as specified; 100% visual |
| Mechanical | Tensile, hardness, impact (low-temp), flattening |
| Corrosion (SS/duplex) | IGC per ASTM A262 Practice E; ferrite check (duplex) |
| Certification | EN 10204 3.1 / 3.2 mill test certificate; NACE MR0175 where required |
Applications & Industries Served
Available Forms, Sizes & Range
Supplied in all grades, matched to run and branch sizes. Share run NPS, branch NPS, schedule and material grade.
| Item | Size Range | Wall / Thickness / Rating | Standard |
|---|---|---|---|
| Weldolet (standard) | Run 1/2"–60", Branch 1/2"–24" | Std / XS | MSS SP-97 |
| Weldolet (heavy) | Run 2"–60", Branch 1"–24" | Sch 160 / XXS | MSS SP-97 |
| Reducing weldolet | Run 2"–60", Branch 1/2"–12" | Matched to branch | MSS SP-97 |
| Stainless weldolet | Run 1/2"–24", Branch 1/2"–12" | Sch 10S–80S | MSS SP-97 |
Frequently Asked Questions
What is a weldolet?
A forged branch-outlet fitting with a butt-weld branch end and a contoured base welded to the run pipe — giving a self-reinforced 90° branch without a reinforcing pad.
When should I use a weldolet instead of a tee?
When the branch is smaller than the run and a full reducing tee is unnecessary or unavailable — a weldolet is lighter, cheaper and integrally reinforced.
How is a weldolet sized?
By the run-pipe size, the branch size and the branch schedule — give all three and we supply the correct reinforced weldolet.
What grades do you supply?
A105 carbon, A350 low-temp, A182 alloy/stainless/duplex and B564 nickel alloys.
Product Range
The weldolets range can be supplied with related pipes, tubes, butt weld fittings, forged fittings, flanges, fasteners and custom fabricated items where required by the BOQ.
Applications
For dimensional references, see the Pipe Schedule & Fittings Guide. For related supply, review Pipes & Tubes, Butt Weld Fittings, Forged Fittings and Flanges.
Types of Products
| Type | Description |
|---|---|
| Seamless / Welded | Pipes and tubes by manufacturing route |
| Fittings | Elbows, tees, reducers, caps and custom fittings |
| Flanges | Weld neck, slip-on, blind, socket weld and special flanges |
| Fasteners | Stud bolts, nuts, washers and coated fasteners |
Available Forms
Share your BOQ, grades, sizes and quantities for a technical quote with documentation scope.
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Frequently Asked Questions
What materials does Sagiant Piping Industries supply?
Sagiant Piping Industries can supply stainless steel, carbon steel, alloy steel, duplex, super duplex and nickel alloy products subject to project requirement.
Do you provide MTC and test certificates?
MTC, test certificates, heat number traceability and inspection documents can be coordinated based on the material, standard and project scope.
Can Sagiant supply as per project BOQ?
Yes. The team can review BOQs, line lists, drawings and specifications to support pipes, fittings, flanges, fasteners and fabricated items.
Do you support third-party inspection?
Third-party inspection, PMI and dimensional inspection support can be arranged when required by the enquiry or project documentation.
Can you supply both pipes and fittings together?
Yes. Sagiant Piping Industries can support combined RFQs for pipes, fittings, flanges, fasteners and related materials.
Do you manufacture custom fabricated fittings?
Custom fabricated fittings and special items can be supplied as per drawing, BOQ and inspection requirement, subject to feasibility.
Pipes & TubesSeamless, welded, ERW, EFW, LSAW and SSAW options for industrial piping projects.View pipes
Pipe FittingsButtweld, forged, outlet and special fittings for BOQ and line-list requirements.View fittings
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A technical RFQ flow built for engineers, QA teams and project buyers who need clear standards, traceability and dispatch documentation.
Requirement Submission
Share product, grade, size, class, quantity, drawing and delivery location.
Technical Review
Review standards, specifications, missing inputs and service conditions.
Material Selection
Align stainless, carbon, alloy, duplex, titanium or nickel alloy grades.
Quotation & Approval
Confirm commercial scope, documents, inspection needs and timelines.
Production / Sourcing
Coordinate manufacturing, stock sourcing or fabrication as per scope.
Quality Inspection
Manage dimensional checks, MTC review, PMI or third-party inspection.
Dispatch & Documentation
Prepare packing, tagging, test certificates and dispatch documents.
Delivery Support
Support delivery coordination, document handover and project closure.