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Help CenterASTM A333 Grade 6 & Grade 1 Seamless Low Temperature Pipe-Hengzhihui For Cryogenic Pipeline Service – OD 6~204mm | WT 1~18mm
Product Spotlights
For Cryogenic Pipeline Service – OD 6~204mm | WT 1~18mm
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ASTM A333 Grade 6 & Grade 1 Seamless Low Temperature Pipe-Hengzhihui
For Cryogenic Pipeline Service – OD 6~204mm | WT 1~18mm
Product Overview
Our ASTM A333 / ASME SA333 seamless low temperature pipes are manufactured in Grade 6 and Grade 1 for service down to -45°C (-50°F) . These pipes are designed for main cryogenic transfer lines, pipelines, and larger-bore piping systems in LNG terminals, arctic pipelines, and refrigeration systems.
Key Specifications:
Standard: ASTM A333 / ASME SA333
Grades: Grade 6 (Most popular – carbon steel, higher strength), Grade 1 (Standard carbon steel)
Outer Diameter: 6mm – 204mm (Standard Stock: 19mm – 89mm)
Wall Thickness: 1mm – 18mm
Length: 4m – 12m (Fixed or random)
Manufacturing Process: Cold Drawn (Seamless)
Tested: Charpy impact tested at -45°C
✅ ASME SA333 certified – Compliant with ASME Boiler & Pressure Vessel Code Section II
✅ Seamless cold drawn – No weld seam – eliminates brittle fracture risk at low temperature
✅ Charpy impact tested – Guaranteed toughness at -45°C – certified report provided
✅ Grade 6 most economical – Best value for -45°C service
✅ 100% hydrostatic & NDT tested – Guaranteed integrity
✅ EN 10204 Type 3.1 MTC + Impact Report provided
✅ Factory direct – Competitive pricing and fast delivery
Grade Selection – Low Temperature Service
| Grade | Service Temp | Impact Test Temp | Tensile (MPa) | Yield (MPa) | Material Type |
|---|---|---|---|---|---|
| Grade 1 | -45°C (-50°F) | -45°C | ≥380 | ≥205 | Carbon steel |
| Grade 6 | -45°C (-50°F) | -45°C | ≥415 | ≥240 | Carbon steel |
💡 Grade 6 is the most popular grade for low temperature pipeline service – it offers higher strength (≥415 MPa tensile) compared to Grade 1 (≥380 MPa).
Chemical Composition
| Grade | C max | Mn | P max | S max | Si |
|---|---|---|---|---|---|
| Grade 1 | 0.30 | 0.40-1.06 | 0.025 | 0.025 | — |
| Grade 6 | 0.30 | 0.29-1.06 | 0.025 | 0.025 | ≥0.10 |
📌 Note for Grade 1: Each reduction of 0.01% carbon below 0.30% permits an increase of manganese of 0.05% above 1.06%, up to a maximum of 1.35%.
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| Grade 1 | ≥380 | ≥205 | ≥35 |
| Grade 6 | ≥415 | ≥240 | ≥30 |
Low Temperature Charpy Impact Requirements
| Grade | Test Temp (°C) | Min Avg Energy (J) | Min Individual (J) |
|---|---|---|---|
| Grade 1 | -45 | 18 | 14 |
| Grade 6 | -45 | 18 | 14 |
💡 Charpy impact testing is mandatory for both Grade 1 and Grade 6 at -45°C – certified report provided with every shipment.
Manufacturing Process – Cold Drawing
Cold Drawing Process for Low Temperature Pipe:
Hot rolled pipes are pickled to remove scale
Cold drawing precisely reduces the diameter
Heat treatment (normalizing or stress relieving) – ensures fine grain structure for low temperature toughness
Straightening – ensures straightness for pipeline installation
Precision cutting – to exact customer length
100% NDT and hydrostatic testing – guarantees integrity
Charpy impact testing at -45°C – verifies low temperature toughness
Key Applications
| Industry | Application | Recommended Grade | Service Temp |
|---|---|---|---|
| Cold Climate Gas Pipelines | Northern gas transmission | Grade 6 | -45°C |
| Refrigeration Systems | Ammonia transfer lines | Grade 6 | -40°C |
| Petrochemical | Low temperature process piping | Grade 6 | -45°C |
| Oil & Gas | Arctic pipelines | Grade 6 | -45°C |
| Refineries | Low temperature transfer lines | Grade 1 | -45°C |
Why Choose Our ASTM A333 Low Temperature Pipes?
| Advantage | Description |
|---|---|
| Cryogenic specialist | Dedicated line for low temperature grades |
| Grade 6 in stock | Most popular grade – ready to ship |
| Charpy impact tested | Certified test reports at -45°C |
| 100% NDT tested | Hydrostatic + UT – guaranteed integrity |
| Wide size range | OD 6-204mm – one-stop sourcing |
| Full traceability | EN 10204 3.1 MTC + Impact Report |
| Cold drawn precision | Tight tolerances – ideal for pipeline service |
Contact for Quote
📧 Email: yjhtrade@gmail.com
📞 WhatsApp: +86 15106174543
🌐 Website: /
Contact Person: Alice Yuan
Reply within 24 hours.
Tags: ASTM A333 Low Temperature Pipe Grade 6 Pipe Cryogenic Pipe Seamless Pipe ASME SA333 LNG Pipe
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