ASTM A790 Stainless Steel Pipes For Sulfuric Acid Systems

In sulfuric acid handling systems, material selection is critical for long-term performance, corrosion resistance, and safety. ASTM A790 stainless steel pipes are widely used in such corrosive environments due to their duplex or super duplex properties, offering excellent resistance to stress corrosion cracking and superior mechanical strength.

 

Chemical Compatibility of ASTM A790 with Sulfuric Acid

Duplex stainless steels used in ASTM A790 pipes exhibit:

• , especially in acidic environments.
• , especially compared to austenitic stainless steel grades.
• (up to 70%), especially under controlled temperature conditions.

 

For high-concentration sulfuric acid (above 90%), special alloy selection such as super duplex (UNS S32750) or nickel-based alloys may be required.

 

Manufacturing Process of ASTM A790 Stainless Steel Pipes

The production of ASTM A790 stainless steel pipes typically follows these high-quality steps:

 

1.Raw Material Selection
Duplex and super duplex stainless steel billets (e.g., UNS S31803, S32205, S32750) are chosen for their high chromium, molybdenum, and nitrogen content, ideal for sulfuric acid environments.

 

2.Hot Forming / Cold Forming
The billets are heated and pierced to form a hollow tube or cold-rolled into seamless pipes, ensuring dimensional accuracy.

 

3.Heat Treatment
Solution annealing is applied to optimize the duplex microstructure, enhancing corrosion resistance and mechanical strength.

 

4.Pickling & Passivation
Surfaces are chemically treated to remove scale and improve corrosion resistance, crucial for sulfuric acid compatibility.

 

5.Hydrostatic & Non-Destructive Testing
All pipes undergo pressure and ultrasonic tests to detect flaws, in full compliance with ASTM A790 standards.

 

6.Cutting, Beveling, and Packaging
Pipes are cut to standard or custom lengths, beveled for welding, and carefully packed for international delivery.

 

 

Stainless Steel Pipes For Sulfuric Acid Systems ASTM A790 Sizes Chart

		Schedule 10S (WT mm)	Schedule 40S (WT mm)	Schedule 80S (WT mm)	Approx. Weight (kg/m)
1/2"	21.34	1.65	2.77	3.73	1.27 – 2.70
3/4"	26.67	1.65	2.87	3.91	1.70 – 3.83
1"	33.4	1.65	3.38	4.55	2.14 – 5.83
1-1/2"	48.26	1.65	3.68	5.08	3.10 – 9.42
2"	60.33	1.65	3.91	5.54	3.91 – 12.7
3"	88.9	1.9	5.49	7.62	6.40 – 21.0
4"	114.3	2.11	6.02	8.56	8.88 – 30.0
6"	168.28	2.77	7.11	10.97	16.2 – 57.6
8"	219.08	2.77	8.18	12.7	21.2 – 85.4
10"	273.05	3.4	9.27	15.09	33.2 – 124.3
12"	323.85	3.96	10.31	17.48	43.5 – 167.1
14"	355.6	4.19	11.13	19.05	48.6 – 201.6
16"	406.4	4.78	12.7	21.44	61.6 – 259.3

 

Stainless Steel Pipes For Sulfuric Acid Systems ASTM A790 Manufacturer COA

	ASTM A790 / A790M
	UNS S31803 (2205), S32205, S32750 (2507), S32760
	1/8" to 24" (Custom sizes on request)
	SCH 10S, SCH 40S, SCH 80S, or custom per ASME B36.19 / B36.10
	EN 10204 3.1 / 3.2, Mill Test Certificate (MTC), ISO 9001

 

Immediately to obtain the MOQ, Shipping, and Package. Wholesale Stainless Steel Pipes For Sulfuric Acid Systems ASTM A790, For exact ID, wall thickness, and quantity. Please contact us at email: sxthsteel@sxth-group.com

 

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