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Wholesale Stainless Steel Pipe – Quality Stock from Reliable China Factory Direct

Stainless steel pipes are mainly divided into two categories: seamless stainless steel pipes and welded stainless steel pipes. Their shapes include round, square, rectangular, and oval pipes. According to their uses, they can be divided into industrial fluid pipes, boiler heat-resistant pipes, precision instrument pipes, building decoration pipes, and sanitary food-grade pipes. Commonly used materials include 201, 304, 316L, 321, 310S, and 2205.

Stainless steel pipes have outstanding practical advantages. They have strong rust and corrosion resistance, are not afraid of acids, alkalis, humidity, and coastal salt spray environments, and are not easily oxidized and damaged. They have excellent high and low temperature resistance, stable performance under cold and hot environments, and are not easily deformed or cracked. The inner wall of the pipe is smooth, resulting in low resistance to the transported medium, preventing scaling and blockage, and ensuring high flow efficiency. The material is safe, non-toxic, clean, and hygienic, suitable for drinking water, food, and pharmaceutical transportation. They have high overall mechanical strength, strong pressure resistance, are durable, and have a service life far exceeding that of ordinary pipes. They are also easy to cut and weld, convenient to install, and have low maintenance costs. They are widely used in many fields such as chemical, heating, municipal plumbing, machinery equipment, and environmental protection engineering.


Comparison Table of Common Stainless Steel Welded Pipe Material Parameters

Material Types:

Core Performance Characteristics

Applicable Temperatures

Main Application Scenarios

Value for money

201

Weak rust resistance, good toughness, easy to process, moderate corrosion resistance

Normal Room Environment

Building decoration, railings, shelves, general household pipe fittings

Lowest price

304

Excellent overall corrosion resistance, strong versatility, easy to weld and form

≤450℃

Water supply and drainage pipes, food processing pipes, general industrial fluid pipes

Highest value for money

316L

Molybdenum-added corrosion resistance, strong resistance to chloride ions, acids, and alkalis

≤500℃

Chemical fluids, seawater transportation, medical equipment pipe fittings

Moderate to high price

321

Titanium-containing structure stabilizes, resists intergranular corrosion, good weldability

≤600℃

Boiler pipes, heating pipes, high-temperature welded pipe fittings

High price

309S

Excellent high-temperature resistance and oxidation resistance

900-980℃

High-temperature flues, heat treatment furnace piping, heat-resistant air ducts

Relatively high price

310S

Ultra-high temperature resistance, top-tier oxidation resistance

1000-1150℃

Incinerator pipes, high-temperature kiln pipe fittings, high-temperature exhaust gas pipes

Extremely high price

2205 Duplex

High strength, resistant to stress corrosion and high-chlorine corrosion

Medium-High Temperature and Strong Corrosion Environment

Desulfurization pipes, marine engineering, high-salinity wastewater transportation pipes

High-end and expensive

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What is the price of a 20-foot stainless steel pipe?

For stainless steel pipes of the same material and outer diameter, the thicker the wall, the more material is used and the greater the weight, resulting in a higher price. Thin-walled pipes are cheaper, while thick-walled pipes are more expensive. For common 304 stainless steel welded pipes, a 25mm outer diameter and 2mm wall thickness costs approximately $16, a 50mm outer diameter and 3mm wall thickness costs approximately $49, and a 108mm outer diameter and 4mm wall thickness costs approximately $147. These prices are for reference only. Seamless pipes of the same specifications are slightly more expensive than welded pipes. Prices for all types of pipes steadily increase with increasing wall thickness.


What is the service life of stainless steel pipes?

The service life of stainless steel pipes is not fixed and depends mainly on the material grade, usage environment, wall thickness, processing technology, and maintenance. The typical range is from 10 years to over 100 years. Below are specific lifespan data and key influencing factors for different scenarios:


Service Life of Different Materials

Material

Dry indoor environment

Typical outdoor environment

Chlorine-containing environments (e.g., coastal areas)

Highly corrosive environments (chemical/seawater)

201

20-30 years

10-20 years

5-8 years (requires frequent maintenance)

1-3 years (not recommended)

304/304L

50-100 years +

30-50 years

15-30 years

5-15 years

316/316L

70-100 years +

40-60 years

30-50 years +

15-30 years +

321/310S

60-100 years +

40-50 years

25-40 years

20-30 years

2205 Duplex Stainless Steel

70-100 years +

50-70 years +

50 years +

30-50 years +

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2507 Stainless Steel Welded Pipe

2507 Stainless Steel Welded Pipe

2507 stainless steel welded pipe manufacturers have ample inventory, with outer diameters ranging from 16-219mm, wall thicknesses from 0.8-6mm, and standard lengths of 6 meters. Custom sizes and lengths are available upon request. Polishing and brushing treatments are supported. These pipes are widely used in flue gas desulfurization, seawater engineering, and pipelines for heavily corrosive chemicals.
2205 Stainless Steel Welded Pipe

2205 Stainless Steel Welded Pipe

2205 stainless steel welded pipes are available in outer diameters of 10-3000mm, wall thicknesses of 0.5-30mm, and standard lengths of 6m/12m. Welding processes are primarily TIG/MIG, with surface pickling and passivation. Connection methods include welding and flanges. Custom processing is available with short and reliable delivery times.
254 Stainless Steel Welded Pipe

254 Stainless Steel Welded Pipe

254 stainless steel welded pipe, commonly known as 254SMO welded pipe, is a type of super austenitic stainless steel welded pipe, corresponding to UNS number S31254 and German grade 1.4547. It belongs to the 6-molybdenum super stainless steel series and is named for its approximately 6% molybdenum content. It is not a duplex steel, but a high-alloy austenitic stainless steel, possessing extremely high resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking.
309S Stainless Steel Welded Pipe

309S Stainless Steel Welded Pipe

309S stainless steel welded pipe has a high chromium and nickel content, excellent high-temperature resistance, and can withstand temperatures up to 1000℃ for extended periods. It also exhibits strong resistance to high-temperature oxidation and thermal fatigue. Combining good corrosion resistance and weldability, it is not prone to deformation and cracking in high-temperature environments. Leading Chinese stainless steel welded pipe manufacturers recommend 309S as a suitable choice for medium- and high-temperature industrial pipelines such as high-temperature flues, industrial kilns, and heat treatment equipment.
321 Stainless Steel Welded Pipe

321 Stainless Steel Welded Pipe

321 stainless steel welded pipe incorporates titanium, effectively inhibiting intergranular corrosion, making it less prone to rust and cracking after welding, and exhibiting excellent thermal stability. It has good high-temperature resistance, is not easily deformed under alternating hot and cold conditions, has good plasticity for easy processing and forming, and strong fatigue resistance. Chinese stainless steel welded pipe manufacturers recommend 321 material as a suitable choice for boiler piping, thermal equipment, and high-temperature heat exchange pipelines.
310S Stainless Steel Welded Pipe

310S Stainless Steel Welded Pipe

The core advantage of 310S stainless steel welded pipe is its high-temperature resistance, capable of continuously withstanding 1150℃ and short-term withstand of 1200℃. Leading Innovation Factory in China typically stocks the following specifications: outer diameter 16-219mm, wall thickness 0.8-5.0mm, standard length 6 meters, and supports custom orders.
Lingchuang is a professional Stainless Steel Pipe manufacturer and supplier in China. Welcome to import quality products from our factory here.
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