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304L Stainless Steel Tube Pipe

304L Stainless Steel Pipe

  • Standard
  • Technical Treatment
  • Wall Thickness
  • Outer Diameter
  • Surface Finish
  • Welding Way
  • Welding Seam Test
  • AISI, ASTM, EN, DIN, JIS
  • Cold Rolled, Hot Rolled
  • SCH5S – SCH80S
  • 1/8" to 80", DN6-DN2000, 10.3-2000mm
  • Polishing, Annealing, Pickling, Bright
  • PLASMA+TIG
  • Hydrostatic Test/UT/PT/RT
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304L  is a low-carbon variant of AISI 304 stainless steel, designed to improve weldability and reduce susceptibility to intergranular corrosion (carbide precipitation). It is part of the austenitic stainless steel family, offering excellent corrosion resistance, formability, and toughness.

  • TUV ISO 9001:2015, PED 2014/68/EU, and AD 2000-WO
  • DIN EN ISO 9606-1, DIN EN ISO 14732 Welder Certificate
  • EN ISO 9712 NDT Personnel Certificate
  • EN10204.3.1MTC
  • EN ISO 15613 WPQR
  • AISI Grade
  • UNS
  • JIS Grade
  • EN/DIN Symbolical
  • EN/DIN Numerical
  • 304L
  • S30403
  • SUS 304L
  • X2CrNi18-9
  • (EN) 1.4307
stainless steel tube
StandardScopeKey Features
ASTM A312Seamless & welded pipes (general use)Covers sizes NPS 1/8 to NPS 40
ASTM A358Welded pipes for high-temp serviceElectric-fusion-welded (EFW)
ASME B36.19Dimensional standard (schedules 5S-160S)Defines OD, wall thickness, tolerances
ASTM A269Tubing for general serviceOften used in instrumentation
EN 10216-5European standard for pressure pipesEquivalent to ASTM A312
ElementComposition (Typical)%Key Role
Chromium (Cr)18.0 – 20.0%Enhances corrosion resistance & oxidation resistance
Nickel (Ni)8.0 – 12.0%Stabilizes austenitic structure, improves ductility
Carbon (C)≤ 0.03% (max)Low carbon reduces carbide precipitation during welding
Manganese (Mn)≤ 2.0%Aids in hot workability
Silicon (Si)≤ 1.0%Deoxidizer, improves strength at high temps
Phosphorus (P)≤ 0.045%Impurity (kept low)
Sulfur (S)≤ 0.030%Improves machinability (but can reduce corrosion resistance)
Iron (Fe)Balance (~67–72%)Primary base metal
Nominal Size (Tube OD)Wall Thickness, SCHEDULE
DNNPS(inch)mm5S10S40SSTD80S
61∕8"10.3–1.241.731.732.41
81∕4"13.7–1.652.242.243.02
103∕8"17.2–1.652.312.313.2
151∕2"21.31.652.112.772.773.73
203∕4"26.71.652.112.872.873.91
251"33.41.652.773.383.384.55
321-1∕4"42.21.652.773.563.564.85
401-1∕2"48.31.652.773.683.685.08
502"60.31.652.773.913.915.54
652-1∕2"732.113.055.165.167.01
803"88.92.113.055.495.497.62
903-1∕2"101.62.113.055.745.748.08
1004"114.32.113.056.026.028.56
1255"141.32.773.46.556.559.53
1506"168.32.773.47.117.1110.97
2008"219.12.773.768.188.1812.7
25010"273.13.44.199.279.2712.7
30012"323.93.964.579.539.5312.7
35014"355.63.964.78–9.53–
40016"406.44.194.78–9.53–
45018"457.24.194.78–9.53–
50020"5084.785.54–9.53–
55022"558.84.785.54–9.53–
60024"609.65.546.35–9.53–
65026"660.4–––9.53–
70028"711.2–––9.53–
75030"7626.357.92–9.53–
80032"812.8––17.489.53–
85034"863.6––17.489.53–
90036"914.4––19.059.53–
95038"965.2––-9.53–
100040"1016––-9.53–
Tube ODWall ThicknessTolerance of ODTolerance of WTWeight
(inch)(mm)(Gauge)(inch)(mm)(in/mm)(kg/m)
1/4 6.35200.0350.89±0.005 / ±0.13±10%0.124
1/212.7160.0651.65±0.005 / ±0.13±10%0.454
3/419.1160.0651.65±0.005 / ±0.13±10%0.717
125.4160.0651.65±0.008 / ±0.20±10%0.976
1-1/238.1160.0651.65±0.008 / ±0.20±10%1.50
250.8160.0651.65±0.010 / ±0.25±10%2.02
2-1/263.5160.0651.65±0.010 / ±0.25±10%2.54
3 76.2 160.0651.65±0.010 / ±0.25±10%3.06
4101.6140.0832.11±0.015 / ±0.38±10%5.23
6152.4120.1092.77±0.030 / ±0.76±10%10.32
8 203.2120.1092.77+0.061 / +1.27
-0.031 / -0.79		±10%13.86
SizeTube ODThicknessLength
DNmmmm(m)
DN10121.54/6
DN15181.54/6
DN20221.54/6
DN25281.54/6
DN32341.54/6
DN40401.54/6
DN50521.54/6
DN65702.04/6
DN80852.04/6
DN1001042.04/6
DN1251292.04/6
DN1501542.04/6
DN2002042.04/6
DN2502542.04/6
Tube OD Tolerance of ODWall ThicknessTolerance of WTTolerance of Length
(inch)(mm)inch(mm)(Gauge)(inch)(mm)inch/mm
1/4"6.35+/-0.005(0.13)180.049"1.25+/-10.0%+1/8"(3.18)-0
3/8"9.53+/-0.005(0.13)180.049"1.25+/-10.0%+1/8"(3.18)-0
1/2"12.7+/-0.005(0.13)160.065"1.65+/-10.0%+1/8"(3.18)-0
3/4"19.1+/-0.005(0.13)160.065"1.65+/-10.0%+1/8"(3.18)-0
1"25.4+/-0.005(0.13)160.065"1.65+/-10.0%+1/8"(3.18)- 0
1-1/2"38.1+/-0.008"(0.20)160.065"1.65+/-10.0%+1/8"(3.18)-0
2"50.8+/-0.008"(0.20)160.065"1.65+/-10.0%+1/8" (3.18)-0
2-1/2"63.5+/-0.010"(0.25)160.065"1.65+/-10.0%+1/8"(3.18)-0
3"76.2+/-0.010"(0.25)160.065"1.65+/-10.0%+1/8"(3.18)-0
4" 101.6+/-0.015"(0.38)140.083"2.11+/-10.0%+1/8" (3.18)-0
6" 152.4+/-0.030"(0.76)140.083"2.11+/-10.0%+1"(25.4)-0
8"203.2+0.061"(1.55)
-0.031"(0.79)		120.109"2.77+/-10.0%+1"(25.4)-0

Application Industry

IndustriesStandardsDescirptionApplication
Sanitary TubeASTM A270,
EN10357(DIN11850),
AS1528.1,
ISO2037		Beer,
Food & beverage,
pharmacy biological,
and high sanitary industry requirements.		Sanitary tube
Heat Exchanger TubeASTM A249/ASME SA249,
ASTM A269 (Welded),
EN10217-7		Boiler,
Superheater,
Heat Exchanger,
Condenser,
Evaporator		Heat Exchanger Tube
Liquid Cooling SystemASTM A249/ASME SA249,
ASTM A269 (Welded),
EN10217-7		Supercomputer,
Database Center		cooling tube
IIndustrial PipeASTM A312,
ASTM A358,
ASTM A778,
EN10217-7		Petroleum,
Chemical,
Paper,
Water Treatment,
Construction,
Energy,
Environmental Protection		Industrial pipe
Automobile ExhaustASTM A554,
ASTM A249		Passenger cars,
Performance & Racing,
Motorcycles
Automotive Exhaust Pipe

food & beverage Industry

ASTM A270, EN10357(DIN11850), AS1528.1, ISO2037

heat exchanger

ASTM A249/ASME SA249, ASTM A269 (Welded), EN10217-7

Industrial Pipe

ASTM A312, ASTM A358, ASTM A778, EN10217-7

Liquid Cooling System

ASTM A249/ASME SA249, ASTM A269 (Welded), EN10217-7

Automobile Exhaust

ASTM A554, ASTM A249

How Can We Help You?

Get a Quote & Support

Skilled project expert teams will deliver competitive quotes, top-notch service, and complimentary samples to meet your needs.

Professional Stainless Steel Tube & Pipe
Manufacturer & Supplier

  • Quickly delivery
  • Stable welded seam quality
  • Third party inspection
  • Mass inventory
  • Professional inspection team
  • Flanges and fittings supply together

Yaolong is equipped with state-of-the-art machinery to produce high-quality stainless steel pipes. Our advanced facilities include laser cutting machines for precise and clean cuts, internal polishing machines to ensure a smooth, flawless finish, and bright annealing technology for superior corrosion resistance and a polished appearance. Additionally, our internal levelling machines guarantee uniform pipe dimensions and enhanced structural integrity. With these cutting-edge technologies, Yaolong delivers precision-engineered stainless steel pipes that meet the highest industry standards for durability and performance.

We are a trusted manufacturer of high-quality stainless steel tubes, dedicated to delivering superior products that meet the highest industry standards. To ensure reliability and performance, we employ a comprehensive range of advanced testing methods.

By rigorously applying these tests, Yaolong guarantees stainless steel tubes that excel in safety, durability, and performance for diverse industrial applications.

Air Under Water Pressure Test
Hydrostatic Test
Magnetic-particle Inspection
Pneumatic Test
Ultrasonic Testing
Spectro Analysis
X-ray Test

ISO 9001:2015
(ISO) 9001:2015 certification is a globally recognized quality management standard. It ensures that a company follows systematic processes to consistently deliver products and services that meet customer and regulatory requirements. For Yaolong, this certification demonstrates our commitment to quality control, continuous improvement, and customer satisfaction in stainless steel pipe manufacturing.

PED 2014/68/EU (Pressure Equipment Directive)
The PED 2014/68/EU is a European Union regulation that sets safety standards for the design, manufacturing, and testing of pressure equipment. Compliance ensures that Yaolong’s stainless steel pipes meet strict safety and performance requirements for use in high-pressure applications, such as oil & gas, chemical processing, and power plants.

AD 2000-W0
The AD 2000-W0 is a German pressure vessel standard that provides technical guidelines for materials, design, and manufacturing of pressure equipment. Certification under this standard confirms that Yaolong’s pipes adhere to high safety and engineering specifications, making them suitable for demanding industrial environments.

ISO 9001:2015
ISO 9001:2015
PED 2014/68/EU
PED 2014/68/EU
AD 2000-W0
AD 2000-W0

With years of experience in stainless steel pipe manufacturing, Yaolong ensures not only superior product quality but also professional packaging and container loading services. We use customized packaging solutions, including wooden crates, steel straps, and protective coatings, to prevent damage during transit. Our team meticulously plans container loading to maximize space efficiency while ensuring secure stacking and proper weight distribution.

By adhering to international shipping standards, Yaolong guarantees that your stainless steel pipes arrive safely, undamaged, and on time—every time. Trust our expertise for seamless logistics and worry-free global deliveries.

Why choose us?

Professional Stainless Steel Tube & Pipe Manufacturer & Supplier

NANTONG YAOLONG METAL MANUFACTURING CO., LTD is a modern integrated enterprise specialized in manufacturing stainless steel industrial welded tubes and pipes. Currently, Yaolong factory has 4 production bases in Foshan, Guangdong and Nantong,Jiangsu, its annual production capacity reaches 15,000 tons. Nantong Yaolong is honored with NEW TECHNOLOGY ENTERPRISE.

Yaolong company is attractive by talents of professional and technical personnel, it has imported high technology equipment from USA, Germany, France and Japan, producing industrial pipes Φ16- Φ2000mm, thickness in 0.5-18mm. Yaolong company is applying standard of GB, ASTM,  DIN, JIS and ISO. Now, Yaolong is equipped with sophisticated equipment, including Eddy Current Inspection, Metallographic Examination, Hydrostatic Test, Water Tightness Test, Spectral Analysis, X-ray, Roughness Test, Endoscope, Mechanical Universal Test.

Yaolong is equipped with state-of-the-art machinery to produce high-quality stainless steel pipes. Our advanced facilities include laser cutting machines for precise and clean cuts, internal polishing machines to ensure a smooth, flawless finish, and bright annealing technology for superior corrosion resistance and a polished appearance. Additionally, our internal levelling machines guarantee uniform pipe dimensions and enhanced structural integrity. With these cutting-edge technologies, Yaolong delivers precision-engineered stainless steel pipes that meet the highest industry standards for durability and performance.

We are a trusted manufacturer of high-quality stainless steel tubes, dedicated to delivering superior products that meet the highest industry standards. To ensure reliability and performance, we employ a comprehensive range of advanced testing methods.

By rigorously applying these tests, Yaolong guarantees stainless steel tubes that excel in safety, durability, and performance for diverse industrial applications.

Air Under Water Pressure Test
Hydrostatic Test
Magnetic-particle Inspection
Pneumatic Test
Ultrasonic Testing
Spectro Analysis
X-ray Test

ISO 9001:2015
(ISO) 9001:2015 certification is a globally recognized quality management standard. It ensures that a company follows systematic processes to consistently deliver products and services that meet customer and regulatory requirements. For Yaolong, this certification demonstrates our commitment to quality control, continuous improvement, and customer satisfaction in stainless steel pipe manufacturing.

PED 2014/68/EU (Pressure Equipment Directive)
The PED 2014/68/EU is a European Union regulation that sets safety standards for the design, manufacturing, and testing of pressure equipment. Compliance ensures that Yaolong’s stainless steel pipes meet strict safety and performance requirements for use in high-pressure applications, such as oil & gas, chemical processing, and power plants.

AD 2000-W0
The AD 2000-W0 is a German pressure vessel standard that provides technical guidelines for materials, design, and manufacturing of pressure equipment. Certification under this standard confirms that Yaolong’s pipes adhere to high safety and engineering specifications, making them suitable for demanding industrial environments.

ISO 9001:2015
ISO 9001:2015
PED 2014/68/EU
PED 2014/68/EU
AD 2000-W0
AD 2000-W0

With years of experience in stainless steel pipe manufacturing, Yaolong ensures not only superior product quality but also professional packaging and container loading services. We use customized packaging solutions, including wooden crates, steel straps, and protective coatings, to prevent damage during transit. Our team meticulously plans container loading to maximize space efficiency while ensuring secure stacking and proper weight distribution.

By adhering to international shipping standards, Yaolong guarantees that your stainless steel pipes arrive safely, undamaged, and on time—every time. Trust our expertise for seamless logistics and worry-free global deliveries.

Professional Stainless Steel Tube & Pipe
Manufacturer & Supplier

  • Quickly delivery
  • Stable welded seam quality
  • Third party inspection
  • Mass inventory
  • Professional inspection team
  • Flanges and fittings supply together

Yaolong is equipped with state-of-the-art machinery to produce high-quality stainless steel pipes. Our advanced facilities include laser cutting machines for precise and clean cuts, internal polishing machines to ensure a smooth, flawless finish, and bright annealing technology for superior corrosion resistance and a polished appearance. Additionally, our internal levelling machines guarantee uniform pipe dimensions and enhanced structural integrity. With these cutting-edge technologies, Yaolong delivers precision-engineered stainless steel pipes that meet the highest industry standards for durability and performance.

We are a trusted manufacturer of high-quality stainless steel tubes, dedicated to delivering superior products that meet the highest industry standards. To ensure reliability and performance, we employ a comprehensive range of advanced testing methods.

By rigorously applying these tests, Yaolong guarantees stainless steel tubes that excel in safety, durability, and performance for diverse industrial applications.

Air Under Water Pressure Test
Hydrostatic Test
Magnetic-particle Inspection
Pneumatic Test
Ultrasonic Testing
Spectro Analysis
X-ray Test

ISO 9001:2015
(ISO) 9001:2015 certification is a globally recognized quality management standard. It ensures that a company follows systematic processes to consistently deliver products and services that meet customer and regulatory requirements. For Yaolong, this certification demonstrates our commitment to quality control, continuous improvement, and customer satisfaction in stainless steel pipe manufacturing.

PED 2014/68/EU (Pressure Equipment Directive)
The PED 2014/68/EU is a European Union regulation that sets safety standards for the design, manufacturing, and testing of pressure equipment. Compliance ensures that Yaolong’s stainless steel pipes meet strict safety and performance requirements for use in high-pressure applications, such as oil & gas, chemical processing, and power plants.

AD 2000-W0
The AD 2000-W0 is a German pressure vessel standard that provides technical guidelines for materials, design, and manufacturing of pressure equipment. Certification under this standard confirms that Yaolong’s pipes adhere to high safety and engineering specifications, making them suitable for demanding industrial environments.

ISO 9001:2015
ISO 9001:2015
PED 2014/68/EU
PED 2014/68/EU
AD 2000-W0
AD 2000-W0

With years of experience in stainless steel pipe manufacturing, Yaolong ensures not only superior product quality but also professional packaging and container loading services. We use customized packaging solutions, including wooden crates, steel straps, and protective coatings, to prevent damage during transit. Our team meticulously plans container loading to maximize space efficiency while ensuring secure stacking and proper weight distribution.

By adhering to international shipping standards, Yaolong guarantees that your stainless steel pipes arrive safely, undamaged, and on time—every time. Trust our expertise for seamless logistics and worry-free global deliveries.

Get a Quote & Support

Our stainless steel tubing team specializes in delivering high-quality, precision-engineered tubing solutions tailored to meet the diverse needs of industries worldwide.

quote@fsyaolong.com

Email Us

0086 189 3301 1151

Phone & WhatsApp

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