China Supplier 2 Inch TP304 304L Weld Stainless Steel Pipe Price SS316 316L 310S Cold Rolled Seamless Stainless Steel Tube Pipes Sch40 DN20 DN25

Product Description

2 inch Stainless Steel Pipe SS316 SS304 316 316l 310 Cold Rolled Seamless Stainless Steel Pipe 6" 8" 10"

Product Description

Types of Stainless Steel Pipes (Market Classification)
They are mainly categorized by manufacturing process, material grade, structure, usage, surface finish and other dimensions as below:
1. By Manufacturing Process (Most Common Classification)
Seamless Stainless Steel Pipe
No welding seam, produced by hot rolling, cold drawing or extrusion.
Features: High pressure & temperature resistance, uniform wall thickness, excellent tightness.
Application: Oil, gas, chemical industry, boilers, high-pressure fluid delivery.
Welded Stainless Steel Pipe
Made by rolling steel strip into tubular shape then welding.
Longitudinal welded pipe: Straight seam weld, mainstream for general use, low cost.
Spiral welded pipe: Spiral weld, large diameter, for municipal water, large pipeline projects.
Features: Lower cost, large diameter easy to produce; for medium & low pressure scenarios.
2. By Material Grade (Alloy Series)
Austenitic Stainless Steel (Most Widely Used)
304 / 304L: Universal type, good corrosion resistance, for plumbing, decoration, food industry. 304L (low carbon) suits frequent welding.
316 / 316L: Added molybdenum, superior resistance to chloride & seawater; used in marine, chemical, pharmaceutical fields.
321: Titanium-stabilized, anti-intergranular corrosion, for high-temperature equipment.
Duplex Stainless Steel
e.g. 2205, 2507
Mix of austenite and ferrite structure, high strength and strong corrosion resistance.
Application: Offshore engineering, chemical pipelines, harsh corrosive environments.
Ferritic Stainless Steel
e.g. 409, 430
Low cost, good oxidation resistance, mainly for exhaust pipes, decorative tubes, low-demand piping.
Martensitic Stainless Steel
e.g. 410, 420
High hardness and mechanical strength, poor corrosion resistance; used for mechanical structural pipes instead of fluid piping.
3. By Wall Thickness & Pressure Rating
Standard wall pipe: Conventional thickness, for general water, gas delivery.
Thin-walled pipe: Light weight, sanitary type, widely used in drinking water, food and medical industries.
Thick-walled pipe: Heavy wall, for high pressure, high temperature industrial pipelines.
Also marked by Schedule (SCH) standards: SCH5, SCH10, SCH40, SCH80, SCH160, etc.
Core Composition:

Grade	C ≤	Mn ≤	Si ≤	P ≤	S ≤	Cr	Ni	Mo
201	0.15	7.50	1.00	0.060	0.030	16.00-18.00	3.50-5.50	-
304	0.08	2.00	1.00	0.045	0.030	18.00-20.00	8.00-11.00	-
304L	0.03	2.00	1.00	0.045	0.030	18.00-20.00	8.00-12.00	-
316	0.08	2.00	1.00	0.045	0.030	16.00-18.50	10.00-14.00	2.00-3.00
316L	0.03	2.00	1.00	0.045	0.030	16.00-18.50	10.00-14.00	2.00-3.00
430	0.12	1.00	1.00	0.040	0.030	16.00-18.00	≤0.75	-
410	0.08-0.15	1.00	1.00	0.040	0.030	11.50-13.50	≤0.75	-
420	0.16-0.42	1.00	1.00	0.040	0.030	12.00-14.00	≤0.75	-
2205 (Duplex)	0.03	2.00	1.00	0.040	0.030	21.00-23.00	4.50-6.50	2.50-3.50

4. By Usage & Function
Sanitary stainless steel pipe: Polished smooth inner wall, no dead space, for food, beverage, medical, biopharmaceutical industries.
Industrial fluid pipe: For chemical, petroleum, power plant medium delivery.
Structural pipe: For building frames, railings, scaffolding, decoration.
Heat exchange tube: Special thin tube for boilers, heat exchangers, condensers.
Instrument tube: Small diameter, high precision, for instrument signal & pressure guiding.
5. By Surface Finish
No.1 (Hot rolled & pickled): Matte surface, industrial pipeline use.
2B (Cold rolled): Smooth silver surface, general engineering & plumbing.
BA (Bright Annealed): Mirror bright surface, sanitary and decorative use.
Brushed / Hairline finish: Textured surface, architectural decoration.
Polished mirror: High-gloss, for luxury decoration.
6. By Shape
Round pipe: Standard type for most pipelines.
Square / Rectangular pipe: Mainly for structure, decoration, handrails.
Special-shaped pipe: Oval, hexagonal etc., for customized mechanical equipment.

Anti-Corrosion Mechanism
 

Grade	Tensile Strength (MPa) ≥	Yield Strength (MPa) ≥	Elongation (%) ≥	Hardness (HB) ≤	Key Performance Features
201	520	205	40	215	High strength, low Ni, poor corrosion resistance
304	515	205	40	201	Generalpurpose, good ductility, weldable
304L	485	170	40	201	Low carbon, better antiintergranular corrosion
316	515	205	40	217	Good chloride resistance (marine / chemical)
316L	485	170	40	217	Lowcarbon marine grade, excellent weldability
430	450	205	22	183	Ferritic, magnetic, low cost, decorative
410	485	275	20	215	Martensitic, hardenable, wearresistant
2205 (Duplex)	620	450	25	293	Ultrahigh strength, antistress corrosion

Detailed Photos

Surface

Packaging & Shipping

Company Profile

Our company offers variety of products which can meet your multifarious demands. We adhere to the management principles of "quality first, customer first and credit-based", since the establishment of the company and always to do our best to satisfy potential needs of our customers. Our company is sincerely to willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with irresistible force.

Quality Control

Certifications

FAQ

Q1: Why choose us?
A: Our company, as an internationally experienced and professional supplier, has been engaged in steel business for more than ten years. We can provide a variety of steel products with high quality to our clients.

Q2: Can you provide OEM/ODM service? 
A: Yes. Please feel free to contact us for more details.

Q3:What is your terms of payment?
A: 100% T/T advance.
30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.

Q4: Can we visit your factory? 
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.

Q5: Can you provide sample? 
A: Yes. Sample is free for regular sizes, but the buyer needs to pay freight cost.

Q6: How long is your delivery time?
A: Regular lead time is 15 to 30 days after receiving deposit.