Hastelloy Buttweld Fittings Manufacturer and Supplier in India

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Hastelloy Buttweld Fittings are high-performance piping parts that are used to join, redirect, reduce or terminate pipelines in high-temperature and highly corrosive environments. These are fabricated by forming and machining Hastelloy alloy pipe or plate, then precisely beveling, heat treating and dimension checking to ASME B16.9 standards. These buttweld fittings are commonly made up of nickel, molybdenum, chromium and other materials that help to provide high resistance and corrosion resistance in harsh chemical environments. They are made in many different grades according to industry requirements; some of the most common, which are used, are known as Hastelloy C22, C276, C2000, B2 and B3 and in different configurations such as elbows, tees, reducers, caps, stub ends and crosses. Kalpataru Piping is a renowned manufacturer and exporter of Hastelloy Buttweld Fittings in India, offering the best products at low prices.

Specifications of Hastelloy Buttweld Fittings
Chemical Composition of Hastelloy Buttweld Fittings
Hastelloy Buttweld Fittings Mechanical Properties
Different Types of Hastelloy Buttweld Fittings
Equivalent Grades of Hastelloy Buttweld Fittings
Industrial Uses of Hastelloy Buttweld Fittings
Frequently Asked Questions

Specifications of Hastelloy Buttweld Fittings

Description	Specifications / Standard Details
Specifications	ASTM B366 / ASME SB366 (Nickel & Nickel Alloy Fittings)
Dimensions	ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS1560, BS10
Size	Seamless Butt Weld Fittings: 1/2″ – 10″ Welded Butt Weld Fittings: 1/2″ – 48″
Thickness	SCH10, SCH20, SCH30, STD, SCH40, SCH60, XS, SCH80, SCH100, SCH120, SCH140, SCH160, XXS (available with NACE MR 01-75 compliance)
Size Range	½” NB to 24″ NB in Sch 10s, 40s, 80s, 160s, XXS (DN6–DN600)
Type	DN15–DN1200
Bending Radius	R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Elbows	Angle: 22.5 deg, 30 deg, 45 deg, 90 deg, 180 deg (1.0D, 1.5D, 2.0D, 2.5D, 3D, 4D, 5D, 6D, 7D–40D) Standard: ASME B16.9, ASME B16.28, ASME B16.25, MSS SP-75, DIN2605, JISB2311, JISB2312, JISB2313, BS, GB, ISO
Connection	Butt Welded
Manufacturing Process	Forged, Cast, Pushed, Pressed, etc.
Test Certificates	EN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report, etc.
Specialized Products	90 Deg Elbows, 45 Deg Elbows, Tees, Crosses, Reducers, Pipe Caps, Stub Ends, Pipe Bends
Grades	Hastelloy: C276, C22, C2000, B2, B3

Chemical Composition of Hastelloy Buttweld Fittings

Grade	C (max)	Mn (max)	Si (max)	S (max)	Co (max)	Ni (min)	Cr	Fe	Mo	P (max)
C276	0.010	1.00	0.08	0.03	2.50	50.99	14.50 – 16.50	4.00 – 7.00	15.00 – 17.00	0.04
C22	0.01	0.50	0.08	0.02	2.50	50.015	20.00 – 22.50	2.00 – 6.00	12.50 – 14.50	0.02
B2	0.02	1.0	0.1	0.03	1.0	Bal	1.0 (max)	2.0 (max)	26 – 30	0.04

Hastelloy Buttweld Fittings Mechanical Properties

Grade	Density	Melting Point	Tensile Strength	Yield Strength(0.2% offset)	Elongation
Hastelloy C276	8.89 g/cm3	1370∘C (2500 ∘F)	1,15,000 Psi (790 MPa})	52,000 Psi (355 MPa})	40%
Hastelloy C22	8.69 g/cm3	1399∘C (2550 ∘F)	1,00,000 Psi (690 MPa)	45,000 Psi (310 MPa})	45%
Hastelloy B2	9.2 g/cm3	1370∘C (2500 ∘F)	1,10,000 Psi (760 MPa})	51,000 Psi (350 MPa)	40%

Equivalent Grades of Hastelloy Buttweld Fittings

Grade	STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	EN	OR
Hastelloy C276	—	2.4819	N10276	NW 0276	—	ХН65МВУ	NiMo16Cr15W	ЭП760
Hastelloy C22	—	2.4602	N06022	NW 6022	—	—	NiCr21Mo14W	—
Hastelloy B2	—	2.4617	N10665	—	—	—	—	—

Different Types of Hastelloy Buttweld Fittings

Buttweld Cross

Buttweld Tee

Pipe Bend

Pipe Cap

Pipe Nipples

Reducer

Stub End

Buttweld Elbow

Industrial Uses of Hastelloy Buttweld Fittings

Chemical Processing Industry
Oil & Gas Industry
Petrochemical Industry
Pharmaceutical Industry
Pulp & Paper Industry
Power Generation Industry
Marine & Offshore Industry
Mining & Metallurgical Industry

Frequently Asked Questions

What are Hastelloy Buttweld Fittings?

Hastelloy Buttweld Fittings are piping components made from nickel-based Hastelloy alloys that are used to connect, change direction, reduce, or terminate pipelines. They are welded directly to pipes to create strong, permanent, and leak-proof joints.

What are Hastelloy Buttweld Fittings used for?

Hastelloy Buttweld Fittings are used in chemical processing, oil and gas, petrochemical, pharmaceutical, power generation, marine, and pollution control industries where excellent corrosion resistance and high-temperature performance are required.

What is the difference between Hastelloy C22 and Hastelloy C276 Buttweld Fittings?

Hastelloy C22 offers better resistance to oxidizing chemicals and pitting, while Hastelloy C276 provides excellent resistance to both oxidizing and reducing environments and is widely used for handling aggressive chemical media.

What are the advantages of Hastelloy Buttweld Fittings?

Hastelloy Buttweld Fittings offer excellent corrosion resistance, high-temperature strength, good weldability, resistance to pitting and crevice corrosion, and long service life in harsh industrial environments.

Are Hastelloy Buttweld Fittings resistant to corrosion?

Yes, Hastelloy Buttweld Fittings provide outstanding resistance to corrosion, including pitting, crevice corrosion, stress corrosion cracking, and attack from many acids, chlorides, and oxidizing chemicals.

Can Hastelloy Buttweld Fittings be welded?

Yes, Hastelloy Buttweld Fittings have excellent weldability and can be welded using standard welding processes while maintaining their corrosion resistance and mechanical properties when proper welding procedures are followed.

FAQ’s About Monel Flanges

What is the maximum service temperature for Monel 400 flanges?

Monel 400 flanges can be used up to approximately 550°C (1022°F) in non-oxidizing conditions, making them suitable for high-temperature chemical processing and steam applications.

Can Monel flanges be used with hydrofluoric acid?

Yes. Monel 400 is the industry-standard material for handling hydrofluoric acid at nearly all concentrations and temperatures in de-aerated conditions, which is why it is widely specified for HF alkylation units in refineries.

What is the difference between ASTM B564 and ASME SB564?

ASTM B564 is issued by ASTM International, while ASME SB564 is the equivalent specification adopted by the ASME Boiler and Pressure Vessel Code. The two are technically identical for Monel forged fittings and flanges; ASME SB564 is typically referenced for boiler and pressure-vessel code compliance.

Do you supply Mill Test Certificates with Monel flanges?

Yes. Every Monel flange from Kalpataru Piping is supplied with an EN10204 Type 3.1 Mill Test Certificate as standard. Type 3.2 third-party witnessed certification and additional QAP or radiography documentation can be arranged on request.

What is the typical lead time for Monel flanges?

Standard sizes in Monel 400 and Monel K500 are typically available ex-stock or within a short lead time; custom sizes, pressure classes, or Type 3.2 certification requirements may extend delivery. Contact our sales team with your specification for an accurate lead-time estimate.

What is the difference between a Monel Slip-On Flange and a Monel Weld Neck Flange?

A slip-on flange slides over the pipe end and is fillet-welded on both sides, making it easier and faster to install at lower pressure ratings. A weld neck flange has a tapered hub that is butt-welded to the pipe, giving superior stress distribution and making it the preferred choice for high-pressure, high-temperature, and cyclic-load services.