Stainless Steel 304 Buttweld Fittings

KVN Steels, SS 304/304L/304H Buttweld Fittings are manufactured to deliver precision, reliability, and long-lasting performance in complex piping systems. Available in a wide variety of forms such as elbows, tees, reducers, end caps, stub ends, and customized configurations, these fittings are developed to cater to both standard and application-specific requirements. Fabricated in compliance with global quality benchmarks, these stainless steel fittings ensure durability and efficient performance under diverse operating conditions. With consistent supply capabilities across India, the United Arab Emirates (UAE), the Kingdom of Saudi Arabia (KSA), Kuwait, Qatar, Oman, Iran, and Iraq, we ensure timely fulfillment of both domestic and export demands.

Technical Overview

Stainless Steel 304, 304L, and 304H grades offer a balanced combination of strength, corrosion resistance, and ease of fabrication. While SS 304 serves as the base austenitic grade, 304L provides improved weldability due to lower carbon content, and 304H is preferred for applications involving elevated temperatures due to its higher carbon composition. These stainless steel buttweld fittings conform to ASTM A403 and are suitable for both seamless and welded pipe connections. The fittings feature beveled ends for full penetration welding and optimal alignment during installation. The internal smooth finish promotes unrestricted flow, while the butt welding technique ensures structural integrity, reduced leakage risk, and consistent mechanical strength across the piping network.

Applications & Industry Use

KVN SS 304/304L/304H Buttwelded Fittings are ideal for industries requiring hygienic, corrosion-resistant, and pressure-bearing pipeline systems. Common areas of application include oil and gas transmission, petrochemical processing, power generation, heat exchangers, water treatment, and food and beverage production. Additionally, these fittings are widely used in pharmaceutical manufacturing, chemical plants, architectural designs, and general fabrication works. Their excellent resistance to oxidation, carbide precipitation, and corrosive media—along with superior weldability and mechanical strength—makes them highly suitable for both intermittent and continuous high-temperature services. Each fitting undergoes rigorous quality testing and is securely packed in wooden crates or pallets to ensure damage-free delivery.

304/304L/304H Stainless Steel ASTM A403 Buttweld Fittings Equivalent Grades

STANDARD	UNS	WNR.	AFNOR	EN	JIS	BS	GOST
SS 304	S30400	1.4301	Z7CN18‐09	X5CrNi18-10	SUS 304	304S31	08Х18Н10
SS 304L	S30403	1.4306/1.4307	Z3CN18‐10	X2CrNi18-9 / X2CrNi19-11	SUS 304L	304S11	03Х18Н11
SS 304H	S30409	1.4301	-	-	-	-	-

SS 304/304L/304H Elbow

Stainless Steel 304 90 Deg Elbow, ASTM A403 SS 304L 45 Deg Elbow, UNS S30400 /S30403 180 Deg Elbow, UNS S30409 LR Elbow, DIN 1.4301 SR Elbow, ANSI B16.9 SS 304H 90 Degree Short Radius Elbow, 304H SS 45 Deg Long Radius Elbow

SS 304/304L/304H Tee

SS ASTM A403 WP304 Equal Tee, ASME B16.9 Stainless Steel 304H Pipe Tee, DIN 1.4301 Butt weld Tee, ASME SA403 Stainless Steel 304L Reducing Tee, DIN 1.4307 Unequal Tee, UNS S30400 / S30403 / S30409 Tees, A403 WP 304L SS Straight Tee

SS 304/304L/304H Eccentric Reducer

B16.9 Stainless Steel 304 Eccentric Reducer Supplier, ASTM A403 Stainless Steel WP304L Eccentric Reducer, ASTM A403 WP304H SS Eccentric Reducer, UNS S30400 / S30403 Eccentric Reducers, DIN 1.4301 Eccentric Reducer

SS 304/304L/304H Concentric Reducer

ANSI B16.9 Stainless Steel 304 Concentric Reducer Supplier, SS ASME SA 403 WP304L Concentric Reducer, Stainless Steel 304H Concentric Reducer, UNS S30400/ S30403 Concentric Reducers, SS DIN 1.4301 / 1.4307 Concentric Reducer

SS 304/304L/304H Long Stub End

ASTM A403 WP304 SS Long Stub End Supplier, ASME B16.9 Stainless Steel 304L Long Stub Ends, UNS S30400 / S30403 / S30409 Long Stub End, SS 304H Long Stub End, SS 304/ 304L Lap Joint Stub End, DIN 1.4301 / 1.4307 Long Stub End

SS 304/304L/304H Short Stub End

ASTM A403 SS 304 Short Stub End Supplier, ASME B16.9 Stainless Steel A403 WP 304H Short Stub Ends, ASME SA 403 Stainless Steel 304H Short Stub End, SS UNS S30400 Short Stub Ends, DIN 1.4307 Short Stub End

SS 304/304L/304H Cap

ASTM A403 / SA403 Stainless Steel WP304 Pipe Cap Supplier, ASME B16.9 SS 304L End Pipe Cap, SS UNS S30400 Pipe End Cap, UNS S30403 Buttweld Cap, DIN 1.4301 Cap, A403 WP 304H Buttweld Pipe Cap, UNS S30409 End Cap

SS 304/304L/304H Cross

ASTM A403 Stainless Steel 304 Equal Cross, ASME B16.9 SS 304L Buttweld Cross, ASTM A403 WP304H Cross, SS UNS S30400 / S30403 Unequal Cross, SS S30409 Cross, DIN 1.4301 Reducing Cross

SS 304/304L/304H Pipe Bend

ASME SA 403 SS 304 Pipe Bend Exporter, B16.9 Stainless Steel 304L Piggable Bend, UNS S30400 / S30403 / S30409 U Bend, SS DIN 1.4307 Long Radius Bend, ASTM A403 Stainless Steel 304H Buttweld Bend

Specifications :

ASTM A403 / ASME SA403

Dimensions :

ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10 ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799

Size :

Seamless Butt Weld Fittings : 1/2" - 10" | Welded Butt Weld Fittings : 1/2" - 48"

Schedule :

SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75

Bending Radius :

R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom

Type :

Seamless / ERW / Welded / Fabricated

Thickness :

20 Swg., 18 Swg., 16 Swg., 14 Swg., 12 Swg., 10 Swg., & Sch. 10, Sch. 40, Sch. 80 etc.

Chemical Composition of SS 304/304L/304H Seamless and Welded Pipe Fittings

	C	Mn	Si	P	S	Cr	Ni	N
304	0.07max	2.0max	0.75max	0.045max	0.03max	min: 18.0 max: 20.0	min: 8.0 max: 10.5	—
304L	0.03max	2.0max	0.75max	0.045max	0.03max	min: 18.0 max: 20.0	min: 8.0 max: 12.0	0.10 max
304H	min: 18.0 max:20.0	min: 8.0 max: 10.5	min: 0.04 max:0.10	0.75 max	2.0 max	0.045 max	0.03 max	0.10 max