This 4" NPS Schedule 40 304 stainless steel pipe (4.500" OD, 0.237" wall, 10.79 lb/ft) balances high flow capacity with manageable handling weight. It is widely used for main process lines in chemical plants, water treatment distribution systems, and structural columns in architectural projects. Certified to ASTM A312, it delivers 73,200 PSI tensile strength and maintains excellent corrosion resistance across a broad temperature range, from cryogenic service at -425°F to continuous operation at 1,500°F.
Stainless Steel Pipe 304 Schedule 40 - 4 Inch | Industrial & Structural
The 4" NPS size is one of the most versatile large-diameter options in our 304 Schedule 40 lineup. It provides substantial flow capacity for mainline piping while remaining practical to transport and install. Common applications include industrial process headers, water treatment distribution mains, and large architectural handrail systems where structural rigidity and aesthetic finish are both required.
Specifications
| Material: |
304 Stainless Steel |
| Standards: |
ASTM A312 |
| Strength/Tensile: |
73,200 PSI |
| Dimensions: |
4" NPS, Schedule 40 Wall (0.237"), 240" Length |
| Finish: |
Mill Finish, Annealed |
| Certifications: |
MTR Available |
Type 304 stainless steel pipe is an austenitic chromium-nickel alloy valued for its combination of strength, corrosion resistance, and excellent weldability. Conforming to ASTM A312, it's suitable for a wide range of temperatures and pressures. Its smooth interior surface is ideal for sanitary applications and resists product buildup, ensuring purity in fluid and gas transport systems.
As a large diameter pipe, this 4" NPS Schedule 40 size is specified for applications requiring high flow capacity, such as main water lines, industrial process piping for chemicals and food products, and as robust structural columns or supports in corrosive environments.
Application scenarios
Chemical Processing:
Main process headers and reactor feed lines - large ID accommodates high-volume corrosive fluid transfer.
Water Treatment:
Primary distribution piping for filtration and reverse osmosis systems - smooth interior resists scaling.
Architectural:
Large-diameter columns and structural frames for commercial buildings - polished finish available for exposed applications.
Pharmaceutical:
Bulk water-for-injection (WFI) distribution loops - hygienic surface meets sanitary standards.
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