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3/4″ Stainless Steel Seamless Pipe 316
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Size: 3/4
Product Type: Stainless Steel Seamless Pipe
Grade: 316 Stainless Steel
UOM: FT
Product Overview
316 stainless steel seamless pipes are engineered for exceptional performance in corrosive environments, high-temperature applications, and industries requiring superior strength and longevity. As a leading seamless stainless steel pipe suppliers, we deliver precision-crafted pipes adhering to international standards (ASTM A312, ISO 15116, DIN 17650). Our product range includes diverse sizes, wall thicknesses, and finishes, making us the ideal partner for sectors like oil & gas, chemical processing, marine engineering, and HVAC systems.
Technical Specifications Table
Below is a comprehensive overview of 316 stainless steel seamless pipe specifications, hardness, dimensions, and key attributes:
| Specification Parameter | Details |
|---|---|
| Material Grade | ASTM A312/ISO 15116: 316L (low-carbon variant) & 316 (standard) |
| Standard Hardness (Rockwell B) | 18–20 HRC (annealed), 25–32 HRC (normalized), 48–55 HRC (quenched & tempered) |
| Diameter Ranges | 1/8″ – 60″ (3–1524 mm) |
| Wall Thickness | Sch 40–Sch 160 (SCH stands for Standard Pipe Schedule) |
| Chemical Composition (%) | Chromium (16–18), Nickel (10–14), Molybdenum (2–3), Carbon (≤0.08) |
| Manufacturing Process | Electric Arc Welding (EAW) with precision rolling and heat treatment |
| Corrosion Resistance | Superior resistance to pitting, crevice corrosion, and chlorides |
| Operating Temperature | -200°C to 315°C (-292°F to 600°F) |
| Surface Finish | Bright Annealed (BA), Polished (Ra ≤ 0.4 μm), Blackened, or Custom |
Mechanical Properties & Applications
Tensile Strength & Bending Strength
316 stainless steel seamless pipes exhibit outstanding mechanical performance:
- Tensile Strength: 550–750 MPa (depending on heat treatment)
- Bending Strength: 400–600 MPa (proven for heavy-load structures)
These properties make them ideal for pipelines under high pressure, structural supports, and machinery components. The addition of molybdenum in 316 alloy enhances resistance to localized corrosion, extending service life in harsh environments.
Identification Methods
Proper identification ensures compatibility and compliance with standards:
- Grade Marking: “316” or “316L” stamped on the pipe surface.
- Color Coding: Silver-gray for standard 316, slightly darker gray for 316L.
- Certification Documents: Include mill test reports (MTRs) with chemical analysis and mechanical testing results.
Weight Calculation
The weight of a 316 stainless steel seamless pipe is calculated using:
Weight (kg/m) = (OD – WT)/12 × WT × 0.02466 × Density
(Density of stainless steel = 7.85 g/cm³)
Our team provides customized weight estimates for bulk orders to optimize logistics and cost.
Why Does Stainless Steel Rust? Insights for 316 Seamless Pipes
Contrary to common belief, stainless steel does not inherently “rust,” but it can corrode under specific conditions. Understanding the causes helps prevent premature degradation:
- Chloride Exposure: Chlorides in seawater, salt, or cleaning agents break down the passive chromium oxide layer, leading to pitting corrosion. 316 stainless steel resists this better than 304 due to molybdenum content.
- High Temperatures: Prolonged exposure to temperatures above 500°C (932°F) degrades the alloy’s stability, accelerating oxidation.
- Mechanical Abrasion: Scratching the surface removes the protective oxide layer, exposing bare metal to corrosive elements.
- Galvanic Corrosion: When paired with dissimilar metals in moist environments, 316 stainless steel may act as an anode, accelerating corrosion.
Prevention Tips:
- Regular cleaning to remove debris and contaminants.
- Apply protective coatings for outdoor or marine applications.
- Avoid tight bends or sharp edges that trap moisture.
- Use appropriate insulation for pipelines in electrical systems.
Advantages of Choosing Our 316 Stainless Steel Seamless Pipes
- Premium Quality Assurance: Full compliance with ASTM, ISO, and DIN standards.
- Custom Solutions: Tailored sizes, wall thicknesses, and finishes to meet unique project needs.
- Competitive Pricing: Bulk order discounts and logistics support for global delivery.
- Expert Technical Support: Our engineers assist in material selection, design validation, and installation guidance.
- Sustainable Practices: Eco-friendly manufacturing processes and recycling programs.
Seamless Stainless Steel Pipe Sizes Guide
Explore our extensive range of stainless steel seamless pipe sizes:
- Small Diameters: Ideal for instrumentation and hydraulic systems (1/8″ – 2″).
- Medium Diameters: Used in water distribution and industrial piping (3″ – 12″).
- Large Diameters: Perfect for oil & gas pipelines and structural applications (14″ – 60″).
Our inventory covers both standard and non-standard sizes, ensuring minimal downtime for your projects.
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