ASTM B366 Buttweld Fittings Manufacturer in India | Duplex & Super Duplex & Nickel Alloy Exporter

Dipti Metal Industries is a leading manufacturer, supplier, stockist, dealer, and global exporter of ASTM B366 corrosion-resistant nickel alloy buttweld pipe fittings. We produce elbows, tees, reducers, caps, stub ends, crosses and returns in seamless and welded construction, fully compliant with ASME B16.9 / MSS SP-43 dimensions, ASME B16.25 bevels, and delivered with EN 10204 3.1/3.2 certification.

What is ASTM B366?

ASTM B366 covers factory-made wrought corrosion-resistant and nickel alloy buttwelding fittings for pressure piping and pressure vessels. Feedstock must conform to the appropriate ASTM product specifications for pipe/tube, plate/sheet/strip, bar, and forgings. Fittings are supplied solution-annealed and pickled/passivated, unless otherwise specified.

Product Range (Buttweld)

• 90° / 45° / 180° Elbows (LR/SR)

• Equal & Reducing Tees

• Reducers (Concentric & Eccentric)

• Stub Ends (Short & Long Pattern)

• Pipe Caps, Crosses, Returns

• Special geometries on request (heavy wall, large OD, custom radii)

Available schedules: SCH 5 / 10 / 20 / 40 / 80 / 160 / XXS and heavy-wall custom.
End prep: Plain ends or beveled per ASME B16.25.

Manufacturing & Quality

• Feedstock strictly per ASTM product designations (see Table 2 below).

• Processes: seamless, welded, formed from plate, bar or pipe, with welds qualified and examined as ordered.

• Heat treatment: Solution annealed; controlled quench.

• Surface: Pickled/passivated or polished; internal bead removal for welded where specified.

• Testing: PMI, hydro/leak test (when specified), RT/UT per class, DP/MP, hardness, intergranular corrosion (as applicable).

• Documentation: EN 10204 3.1/3.2 MTCs, NDE reports, heat charts, packing lists with full traceability.

Class Options (as ordered)

• WP-S: Seamless fittings

• WP-W: Welded fittings with radiographed welds

• WP-WX: All welds radiographed

• WP-WU: All welds ultrasonically examined

• CR: MSS SP-43 light-weight corrosion-resisting fittings

Key Application Sectors

Chemical & Petrochemical, Offshore Oil & Gas, Refineries, Power & Energy, Desalination & Water Treatment, Pulp & Paper, Fertilizers, Maritime & Shipbuilding, Waste-to-Energy, Aerospace projects.

Global Export Reach

Middle East: UAE, Saudi Arabia, Qatar, Oman, Bahrain, Kuwait, Iraq
Asia: India, Japan, South Korea, Singapore, Malaysia, Vietnam, Thailand, Indonesia, Philippines, Bangladesh
Europe: UK, Germany, France, Italy, Netherlands, Spain, Poland, Belgium, Sweden, Norway, Denmark, Finland, Czechia
Africa: South Africa, Egypt, Nigeria, Kenya, Algeria, Morocco, Ghana, Tanzania
Americas: USA, Canada, Mexico, Brazil, Argentina, Chile, Peru, Colombia
Oceania: Australia, New Zealand

TABLE 2 — Permissible Raw Materials (ASTM B366)

Columns: CR Marking → ASME Marking → Alloy → UNS → Pipe/Tube (ASTM) → Plate/Sheet/Strip (ASTM) → Bar/Forging/Forging Stock (ASTM)

Typical Grades We Supply (quick view)

Nickel & Nickel-Copper: N02200, N02201, N04400
Ni-Cr / Ni-Fe-Cr: N06600, N06601, N08800/10/11, N08120
Ni-Cr-Mo / Ni-Mo: N06625, N06686, N10276, N06022, N06059, N06035, N06455, N06230, N06210, N06200
Ni-Fe-Cr-Mo-Cu: N08825, N08020, N08031
Austenitic corrosion-resistant: N08904, N08925, N08926
…and many others per Table 2.

Ordering Checklist

• Standard & Class: ASTM B366, WP-S / WP-W / WP-WX / WP-WU / CR

• Alloy & UNS: e.g., WPNCMC (UNS N06625)

• Dimensions: ASME B16.9 or MSS SP-43; size, schedule, radius, wall

• Ends: Beveled per ASME B16.25 or plain ends

• Feedstock route (if critical): seamless/welded/plate formed

• Exams: RT/UT level, hydro, PMI, IGC, hardness, corrosion tests

• Docs: EN 10204 3.1/3.2, TPI if required, packing & export marks

FAQs

What does ASTM B366 cover?
Wrought buttweld fittings in corrosion-resistant and nickel alloys for pressure piping/vessels, using qualified feedstock per ASTM product specs.

Are both seamless and welded fittings available?
Yes—WP-S (seamless) and WP-W/WX/WU (welded with RT/UT requirements).

Do you supply global projects?
Yes—75+ countries with complete MTCs, NDE dossiers, and third-party inspection when requested.

Dipti Metal Industries — India’s trusted source for ASTM B366 buttweld fittings across Inconel®, Hastelloy®, Monel®, Alloy 20, 904L, and specialty grades, manufactured to international codes with rapid export logistics.