A358
ASTM A358 304L Stainless Steel Welded Pipe is manufactured to meet the demanding requirements of chemical, petrochemical, power generation, and shipbuilding industries. Grade 304L is a low‑carbon variant of 304 stainless steel, offering excellent resistance to intergranular corrosion after welding - especially critical for large‑diameter, heavy‑wall welded pipes.
This is a high-performanceASTM A358 304L electric fusion welded stainless steel pipewith large diameter specification of 750mm outer diameter and 15.5mm wall thickness. Manufactured in strict accordance with ASTM A358 and ASME SA358 industrial standards, this large-bore welded pipe adopts advanced electric fusion welding (EFW) technology, featuring low carbon content, excellent corrosion resistance, high structural stability and weld integrity.
Specially optimizedSouth Korea industrial export market, the product fully complies with Korean industrial equipment, chemical engineering, water treatment and power facility construction standards. All products pass strict radiographic testing and quality inspection, supporting long-term stable service in high-temperature and corrosive working environments, and is a preferred large-diameter stainless steel pipe for Korean engineering projects.
Technical Parameters
1 Basic Specification
|
Item |
Parameter |
|---|---|
|
Product Standard |
ASTM A358 / ASME SA358 |
|
Grade |
304L (UNS S30403) |
|
Manufacturing Process |
Electric Fusion Welded (EFW) |
|
Outer Diameter (OD) |
750mm |
|
Wall Thickness (WT) |
15.5mm |
|
Length |
6m / 12m or customized |
|
Inspection Class |
Class1 / Class2 / Class3 / Class4 / Class5 (optional) |
|
Surface Treatment |
Pickled & Annealed, Smooth Surface |
|
Application |
Chemical industry, water treatment, power plant, petrochemical, Korean municipal engineering |
2 Chemical Composition (Weight %)
|
Element |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
|---|---|---|---|---|---|---|---|
|
304L Standard Value |
≤ 0.03 |
≤ 2.00 |
≤ 0.045 |
≤ 0.030 |
≤ 1.00 |
18.00-20.00 |
8.00-12.00 |
3 Mechanical Properties
|
Item |
Standard Data |
|---|---|
|
Tensile Strength |
≥ 485MPa |
|
Yield Strength |
≥ 170MPa |
|
Elongation |
≥ 40% |
|
Hardness |
≤201 HB |
FAQ
Q1: What is the difference between 304 and 304L stainless steel pipe?
A1: 304L is a low-carbon version of 304 stainless steel with carbon content controlled below 0.03%. It effectively prevents intergranular corrosion caused by welding heat, no need for post-weld heat treatment, and has better corrosion resistance and welding performance, which is more suitable for long-term industrial corrosive environments and high-standard engineering projects in South Korea.
Q2: Is this 750mm*15.5mm large diameter pipe suitable for Korean local engineering standards?
A2: Absolutely yes. Our products comply with ASTM A358 international standards and match Korean KS industrial specification requirements. We have supplied large-diameter stainless steel pipes for many Korean municipal and industrial projects, with complete certification documents and pass 100% Korean project acceptance inspection.
Q3: What quality tests will be conducted before delivery?
A3: All pipes undergo strict factory tests including chemical composition analysis, mechanical property test, radiographic weld inspection, hydraulic pressure test, surface flaw detection and dimensional tolerance inspection;100% UT; Heat Treatment. Complete MTR test reports are provided to support Korean customer inspection and filing.
Q4: What export services do you provide for Korea market?
A4: We provide full-set Korea export services, including professional packaging for ocean transportation, FOB/CIF/CFR Korea port quotation, complete customs clearance documents, origin certificate, and support third-party inspection appointed by Korean customers. Stable stock and fast delivery for regular specifications.
Q5: Can you customize the length and inspection standard of the pipe?
A5: Yes. We support customized pipe length (6m/12m/extra length) and can match different A358 inspection classes (Class1-Class5) according to Korean project demands, to meet different engineering quality grade requirements.
Packaging & Shipping
Packaging: Standard seaworthy export packaging, with anti-rust oil coating, plastic cap protection at pipe ends, wooden frame or steel frame reinforcement, effectively preventing collision and rust during long-distance ocean transportation to Korea.
Shipping: Support sea freight to Busan, Incheon and other Korean mainstream ports, flexible trade terms, fast delivery cycle, professional export logistics tracking service.
