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Stainless Welded Steel Pipe

Our stainless steel welded pipes are manufactured using advanced welding technology, ensuring high precision, durability, and excellent corrosion resistance. These pipes are widely used in industries requiring reliable and cost-effective piping solutions.

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Description
Process
Images

Key Specifications

Diameter: 21.34mm-1219mm
Wall Thickness: 1.65mm to 19.05mm

Standards: ASTM A312, ASTM A358, EN 10217-7, JIS G3459

Material: 304/304L, 316/316L, 321, 310S, 904L, Duplex 2205

Production Process

Material Selection: High-quality stainless steel coils are selected based on the required grade.
Forming: The coils are formed into a cylindrical shape using precision rollers.
Welding: The edges are welded using TIG (Tungsten Inert Gas) or high-frequency welding (HFW) for a seamless finish.
Heat Treatment: Annealing is performed to enhance mechanical properties and corrosion resistance.

Finishing: The pipes are polished, cleaned, and inspected to meet international standards.

NPS	DN	OD	SCH 5s	SCH 10s	SCH 20s	SCH 30s	SCH 40s	SCH 50s	SCH 60s	SCH 80s	SCH 100	SCH 120	SCH 140	SCH 160	SCH 200
1/2	15	21.3	1.65	2.11		2.77	2.77	2.77	3.73	3.73	3.73			4.78	7.47
3/4	20	26.7	1.65	2.11		2.87	2.87	2.87	3.91	3.91	3.91			5.56	7.82
1	25	33.4	1.65	2.77		3.38	3.38	3.38	4.55	4.55	4.55			6.35	9.09
1 1/4	32	42.2	1.65	2.77		3.56	3.56	3.56	4.85	4.85	4.85			6.35	9.7
1 1/2	40	48.3	1.65	2.77		3.68	3.68	3.68	5.08	5.08	5.08			7.14	10.15
2	50	60.3	1.65	2.77		3.91	3.91	3.91	5.54	5.54	5.54			8.74	11.07
2 1/2	65	73	2.11	3.05		5.16	5.16	5.16	7.01	7.01	7.01			9.53	14.02
3	80	88.9	2.11	3.05		5.49	5.49	5.49	7.62	7.62	7.62			11.13	15.24
3 1/2	90	101.6	2.11	3.05		5.74	5.74	5.74	8.08	8.08	8.08
4	100	114.3	2.11	3.05		6.02	6.02	6.02	8.56	8.56	8.56			11.13	15.24
5	125	141.3	2.77	3.4		6.55	6.55	6.55	9.53	9.53	9.53			12.7	15.88
6	150	168.3	2.77	3.4		7.11	7.11	7.11	10.97	10.97	10.97			14.27	18.26
8	200	219.1	2.77	3.76		6.35	7.04	8.18	8.18	8.18	8.18
10	250	273.1	3.4	4.19		6.35	7.8	9.27	9.27	9.27	9.27
12	300	323.9	3.96	4.57		6.35	8.38	9.53	9.53	9.53	9.53
14	350	355.6	3.96	4.78	6.35	7.92	9.53	9.53	9.53	9.53
16	400	406.4	4.19	4.78	6.35	7.92	9.53	9.53	9.53	9.53
18	450	457.2	4.19	4.78	6.35	7.92	11.13	9.53	14.27	19.05	19.05
20	500	508	4.78	5.54	6.35	9.53	12.7	9.53	15.09	20.62	20.62
22	559	478	5.54	6.35	9.53	12.7	9.53	22.23	12.7	28.58	34.93
24	600	610	5.54	6.35	9.53	14.27	9.53	17.48	24.61	12.7	30.96
26	660	700	7.92	12.7		9.53		12.7
28	710	761	7.92	12.7	15.88	9.53		12.7
30	762	813	7.92	12.7	15.88	9.53		12.7
32	884	884	7.92	12.7	15.88	9.53		12.7
36	900	914	7.92	12.7	15.88	9.53		12.7
38	965	965			9.53			12.7
40	1000	1016			9.53			12.7
42	1067	1067			9.53			12.7
44	1100	1118			9.53			12.7
46	1168	1168			9.53			12.7
48	1200	1219			9.53			12.7

Classification of Welded Stainless Steel Pipe Standards

Category	ASTM Standard	Definition
Industrial Process & Pressure Pipe	ASTM A312	Standard for welded austenitic stainless steel pipes used in industrial, pressure, and corrosion-resistant piping systems.
Boiler / Heat Exchanger Tube	ASTM A249	Standard for welded austenitic stainless steel tubes for boilers, superheaters, heat exchangers, and condensers.
Feedwater Heater Tube	ASTM A688	Standard for welded austenitic stainless steel feedwater heater tubes for power generation systems.
General Service Tubing	ASTM A269	Standard for welded austenitic stainless steel tubing intended for general-purpose service applications.
Ferritic / Martensitic Tubing	ASTM A268	Standard for welded ferritic and martensitic stainless steel tubing for general and heat-resistant service.
Sanitary Tubing	ASTM A270	Standard for welded austenitic stainless steel sanitary tubing used in hygienic processing industries.
Duplex Stainless Tubing	ASTM A789	Standard for welded ferritic/austenitic (duplex) stainless steel tubing for general service applications.
Duplex Stainless Pipe	ASTM A790	Standard for welded ferritic/austenitic stainless steel pipe for industrial and pressure service.
Electric Fusion Welded Pipe	ASTM A358	Standard for electric-fusion-welded austenitic chromium-nickel stainless steel pipe for high-temperature and corrosive service.
Large Diameter Welded Pipe	ASTM A409	Standard for welded large-diameter austenitic stainless steel pipe for corrosive or high-temperature environments.
Mechanical Tubing	ASTM A554	Standard for welded stainless steel mechanical tubing used for structural, decorative, and mechanical applications.
Small-Diameter Precision Tubing	ASTM A632	Standard for welded small-diameter austenitic stainless steel tubing for precision and general service applications.
Unannealed Tubular Products	ASTM A778	Standard for welded, unannealed austenitic stainless steel tubular products for low-to-moderate corrosion service.
General Requirements Standard	ASTM A1016 / A1016M	General specification covering testing, inspection, dimensional tolerances, and technical requirements for stainless steel tubes.

Applications

Chemical and petrochemical industries
Food and beverage processing
Water treatment and desalination plants
Architectural and decorative applications
Automotive and aerospace industries

Advantages
Cost-Effective: Lower production costs compared to seamless pipes.
Versatility: Available in a wide range of sizes and thicknesses.
Corrosion Resistance: Ideal for harsh environments and corrosive media.
Smooth Surface: Welded joints are polished to ensure a smooth interior surface.

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No.468, Tongzipo West Road, High-tech Industrial Development Zone, Yuelu District, Changsha, China 410221

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0086 191 8697 0177

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