The SS 304L welded pipes are an elite version with extra-low carbon content in the austenitic family. They show excellent resistance to corrosion as well as intergranular corrosion. These pipes can sustain temperatures up to 899° C. They can also sustain 816° C if the conditions of exposure are not constant. The SS 304L is the low-carbon version of SS 304 and also does not require annealing after welding. This is very useful where stress as well as corrosive conditions exist.
Metinox Overseas provides 304L Welded Stainless Steel Pipes in a variety of specs size, dimensions, and schedules as per specific requirements. The usage of modern technology and superior alloy material enables our products to satisfy international quality standards and produce robust and superior quality pipes for the most demanded industries like chemicals and petrochemicals or even the food industry. The pipe has passed various mechanical and chemical tests. We provide superior quality products because of our track record of success and effectiveness in providing a balance between quality and budget.
Table of Contents
- Specifications of SS 304L Welded Pipe
- 304L Stainless Steel Welded Pipes Chemical Composition
- ASME SA312 SS TP304L Welded Pipes Mechanical Properties
- Stainless Steel UNS S30403 Welded Pipes Equivalent Grades
- Dimensions of UNS S30403 Seamless Pipe
- SS 304L Welded Pipe Schedule Chart
- Types & Forms of SS 304L Welded Pipes
- Applications & Industry Uses of Stainless Steel 304L Welded Pipes
- Testing & Quality Assurance for SS 304L Welded Pipes
- Frequently Asked Questions (FAQ)
Specifications of SS 304L Welded Pipe
| Specification Parameter | Technical Details & Range |
| Standard | ASTM A312 / ASME SA312 (Global Standard) |
| Welded Pipe Size | 1/2" NB to 24" NB (Standard Stock) |
| Outside Diameter (OD) | 6.00 mm OD up to 914.4 mm OD |
| Thickness Range | 0.3 mm to 50 mm |
| Schedules | SCH 5, 10, 40, 80, 80S, 160, XXS, XS |
| Type & Form | Welded; Round, Square, and Rectangular Pipes |
| Length | Single Random (SRL), Double Random (DRL) & Cut-to-Length |
| Pipe Ends | Plain End (PE), Beveled End (BE), Threaded (TE) |
| Outside Finish | 2B, No.1, No.4, No.8 Mirror Finish; Custom Polishing |
| Delivery Condition | Annealed & Pickled (AP), Bright Annealed (BA), Polished |
| EN 10216-5 (Equivalent) | 1.4306 / 1.4307 (Pipes for Pressure Purposes) |
| EN 10217-7 (Equivalent) | 1.4306 / 1.4307 (Welded Pipes for Pressure Purposes) |
304L Stainless Steel Welded Pipes Chemical Composition
| Grade | C (%) | Mn (%) | Si (%) | P (%) | S (%) | Cr (%) | Mo (%) | Ni (%) | N (%) |
| SS 304L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.03 max | 18.0 - 20.0 | � | 8.0 - 13.0 | � |
ASME SA312 SS TP304L Welded Pipes Mechanical Properties
| Grade | Tensile Strength (min) | Yield Strength (0.2% Proof) (min) | Elongation (min) | Hardness (HR B) max | Hardness (HB) max |
| SS 304L | 485 MPa | 170 MPa | 40% | 92 | 201 |
Stainless Steel UNS S30403 Welded Pipes Equivalent Grades
| Standard | UNS | Werkstoff Nr. | EN Designation | JIS (Japan) | BS (UK) | AFNOR (France) | GOST (Russia) |
| SS 304L | S30403 | 1.4306 / 1.4307 | X2CrNi18-9 / X2CrNi19-11 | SUS 304L | 304S11 | Z3CN18-10 | 03X18H11 |
Dimensions of UNS S30403 Seamless Pipe
| OD (mm) | WT (mm) | Weight (kg/m) | Schedule | Nominal Size (Inches) |
| 13.72 | 1.65 | 0.50 | 10S | 1/4" |
| 13.72 | 3.02 | 0.81 | 80S | 1/4" |
| 17.15 | 1.65 | 0.64 | 10S | 3/8" |
| 17.15 | 3.20 | 1.12 | 80S | 3/8" |
| 21.34 | 2.11 | 1.02 | 10S | 1/2" |
| 21.34 | 3.73 | 1.65 | 80S | 1/2" |
| 26.67 | 2.11 | 1.30 | 10S | 3/4" |
| 26.67 | 3.91 | 2.23 | 80S | 3/4" |
| 33.40 | 2.77 | 2.13 | 10S | 1" |
| 33.40 | 4.55 | 3.29 | 80S | 1" |
| 33.40 | 6.35 | 4.30 | 160 | 1" |
| 42.16 | 2.77 | 2.73 | 10S | 1 1/4" |
| 42.16 | 4.85 | 4.53 | 80S | 1 1/4" |
| 42.16 | 6.35 | 5.69 | 160 | 1 1/4" |
| 48.26 | 2.77 | 3.16 | 10S | 1 1/2" |
| 48.26 | 5.08 | 5.49 | 80S | 1 1/2" |
| 60.33 | 2.77 | 3.99 | 10S | 2" |
| 60.33 | 8.74 | 11.29 | 160 | 2" |
| 73.03 | 3.05 | 5.35 | 10S | 2 1/2" |
| 73.03 | 7.01 | 11.59 | 80S | 2 1/2" |
SS 304L Welded Pipe Schedule Chart
| Nominal Pipe Size | OD (Inches) | SCH 5 | SCH 10 | SCH 40 | SCH 80 |
| 1/2? | 0.840 | 0.065 | 0.083 | 0.109 | 0.147 |
| 3/4? | 1.050 | 0.065 | 0.083 | 0.113 | 0.154 |
| 1? | 1.315 | 0.065 | 0.109 | 0.133 | 0.179 |
| 1-1/4? | 1.660 | 0.065 | 0.109 | 0.140 | 0.191 |
| 1-1/2? | 1.900 | 0.065 | 0.109 | 0.145 | 0.200 |
| 2? | 2.375 | 0.083 | 0.109 | 0.154 | 0.218 |
| 2-1/2? | 2.875 | 0.083 | 0.120 | 0.203 | 0.276 |
| 3? | 3.500 | 0.083 | 0.120 | 0.216 | 0.300 |
| 3-1/2? | 4.000 | 0.083 | 0.120 | 0.226 | 0.318 |
| 4? | 4.500 | 0.083 | 0.120 | 0.237 | 0.337 |
Types & Forms of SS 304L Welded Pipes
Square & Rectangular Pipes
Round Welded Pipes
Custom & Special Forms
Applications & Industry Uses of Stainless Steel 304L Welded Pipes
SS 304L Welded Pipes are applied in various industries because of great resistance to corrosion, entailing low carbon content, high strength and simple fabrication. The reason they are favourable in numerous applications is that they can be used under rigorous and corrosive conditions:
Chemical Industry
Ideally applicable in the transportation of corrosive chemicals, acids, and alkalis in chemical processing plants where SS 304L is used as it is a better choice compared to other types of welding due to its resistance to chemical attack and practicality with regards to reducing the risks of intergranular corrosion following the welding process.
Oil & Gas Sector
Used in pipelines, refineries, and processing plants where there is a need to cover mild corrosive environment, sour gas situations and fluctuations in temperature.
Food & Beverage Processing
They are usually used in sanitary piping systems, food processing plants, dairies and breweries because they are hygienic, have smooth surface finish, and are easy to clean.
Pharmaceutical Industry
Applied in the production lines and cleanroom piping systems where very high purity, corrosion resistance and transfer of fluid without contamination is important.
Water Treatment Plants
Applied in the water supply and wastewater treatment piping systems which require long term corrosion resistance, strength and durability.
Construction and Architecture
Used in architectural structures, handrails, decorative piping, and structural elements in which the corrosive and aesthetic appearance are needed.
Automotive and Aerospace
Applied in exhaust systems, fuel lines and structural components where lightweight materials are required to be very strong and resistant to corrosion.
Power Generation
Used in heat exchangers, condensers and cooling systems where the material should resist high temperatures and corrosion during long periods of service.
Testing & Quality Assurance for SS 304L Welded Pipes
SS 304L Welded Pipes are tested to guarantee their quality, good service performance, and safe application to industries.
Mechanical Tests (PMI, IGC, Hardness): Simple mechanical and chemical tests are conducted to make sure that the quality of the pipes is good. PMI testing checks the appropriate grade of stainless steel. IGC testing measures resistance to post welding corrosion. The hardness testing is done to check whether the material is of the appropriate strength and duration.
Certifications & Inspection Reports: The standard certifications that are supplied with SS 304L welded pipes include Mill Test Certificates and inspection reports. These reports assure that the pipes are international in terms of quality in materials.
Packaging, Marking & Shipping: The Proper packing is done to check that the pipes are safely delivered without being damaged.
Packaging Standards & Export Safety: Plastic wrappers, end caps, wooden pallets, or crates are used to pack the pipes securely so that they are not damaged in the course of storing and transportation, particularly when being sent abroad.
Documentation Provided: Every consignment will consist of necessary papers like invoices, packing lists, and test certificates so that it can easily be identified, traced, and delivered without any problem.
Why Choose Metinox Overseas for Stainless Steel 304L Welded Pipes?
- High-quality SS 304L welded pipes manufactured in compliance with ASTM, ASME, and international standards
- Wide range of pipe sizes, wall thicknesses, and surface finishes to suit diverse applications
- Custom fabrication options available to meet specific project and industry requirements
- Strict quality control with testing such as PMI, IGC, hardness, and dimensional checks
- Cost-effective pricing with reliable and on-time delivery across global markets
- Skilled and experienced team offering technical guidance and customized solutions
- Trusted exporter supplying SS 304L welded pipes to the Middle East, USA, Europe, Latin America, and Asia
Looking for High-Quality SS 304L Welded Pipes?
Choose Metinox Overseas � Your Reliable SS 304L Welded Pipe Manufacturer, Supplier & Exporter.
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Frequently Asked Questions (FAQ)
SS 304L welded pipe is made from low-carbon stainless steel. The "L" stands for low carbon, which helps reduce corrosion after welding.
SS 304L has lower carbon than SS 304, making it better for welding and reducing the risk of corrosion at welded joints.
Yes, SS 304L welded pipes can be customized in size, thickness, length, and finish as per project needs.
The most common finishes for SS 304L welded pipes include mill finish, polished, brushed, mirror finish, and pickled & passivated.
Yes, SS 304L welded pipes can handle high temperatures and moderate pressure, making them suitable for many industrial applications.
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