 |
| 起源の場所: | 中国 |
| ブランド名: | YUHONG |
| 証明: | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008. |
| モデル番号: | ASTM A333 Gr.6 炭素鋼シームレス管 |
| 最小注文数量: | 1トン |
|---|---|
| パッケージの詳細: | プラスチックキャップ付きのPly-woodenケース /アイアンケース /バンドル |
| 受渡し時間: | 7日間 |
| 支払条件: | LC、T/T |
| 仕様: | ASTM A333、ASME SA333 | 材料: | グレード6 |
|---|---|---|---|
| od: | 6"への0.75" （19.05mmから154.2mm） | wt: | 1"への0.06" （1.5MMから25.4MM） |
| 長さ: | 単一のランダム、ダブルランダムおよびカット長 | 終わり: | 平面端 / 斜面端 |
| プロセス: | 冷たい-引き分け、終わる熱い | テスト: | ET/HT |
| 応用: | ボイラー、熱交換器、コンデンサー | ||
| ハイライト: | ASTM A333 Gr. 6 carbon steel pipe,seamless tube for low temperature,alloy steel pipe with warranty |
||
ASTM A333 Gr.6 Carbon Steel Seamless Tube for Low-temperature Service
Comparison with Other Low-Temperature Carbon Steels (Within A333/A334)
| Material Standard | Grade | Key Difference vs. A333 Gr.6 | Typical Lowest Temp | Primary Use Case vs. Gr.6 |
|---|---|---|---|---|
| ASTM A333 | Gr.6 (Seamless) | Baseline for comparison. Normalized C-Mn steel for -45°C service. | -45°C (-50°F) | The standard choice for seamless low-temp process piping. |
| ASTM A333 | Gr.1 (Welded) | Similar chemistry, but supplied as welded pipe. Often cheaper. | -46°C (-50°F) | Used where seamless is not mandated by code; for lower pressure/less critical service. |
| ASTM A333 | Gr.3 | Nickel-alloyed (3.5% Ni). More expensive but allows service down to -100°C. | -100°C (-150°F) | Used when temperatures exceed the capability of Gr.6. |
| ASTM A333 | Gr.8 | 9% Nickel steel. Austenitic structure at cryogenic temps. | -195°C (-320°F) | For deep cryogenics (LNG, liquid nitrogen/oxygen). Far more expensive. |
| ASTM A334 | Gr.6 (Tubing) | Identical material spec to A333 Gr.6, but covers seamless and welded TUBING (smaller OD, tighter tolerances). | -45°C (-50°F) | Used for instrument lines, heat exchanger tubes, and small-bore tubing applications. |
*Takeaway: Within the low-temperature carbon steel family, A333 Gr.6 is the workhorse for the -45°C range. Choose a higher grade (Gr.3, Gr.8) for lower temperatures, and consider Gr.1 (welded) or A334 (tubing) for different product forms.
ASTM A333 Gr.6 Carbon Steel Seamless Tube Equivalent Grades
| DIN | EN | BS | NFA | ASME |
|---|---|---|---|---|
| DIN 17178 FGP 28 | EN P215NL 10216-4 | NFA A 36-2051) A 42 AP | ASTM A333 Gr.6 | ASME SA333 Gr. 6 |
ASTM A333 Gr.6 Carbon Steel Seamless Tube Chemical Properties
| Carbon | Silicon | Manganese | Phosphorous | Sulphur | Molybdenum | Nickel | Chromium | Copper | Others |
|---|---|---|---|---|---|---|---|---|---|
| max 0.30 | min 0.10 | 0.29 – 1.06 | 0.025 | 0.025 | – | – | – | – | – |
ASTM A333 Gr.6 Carbon Steel Seamless Tube Mechanical Properties
| Yield Strength | Tensile Strength | Elongation A5 min | |||
|---|---|---|---|---|---|
| MPa min | ksi min | MPa min | MPa min | ksi min | Percentage |
| 240 | - | 415 | – | 60 | 30 |
*Impact Toughness (Charpy V-Notch) Requirements:
Test Temperature: -50°F (-45°C).
Minimum Average Energy: 13 ft-lbf (18 J) for a set of three specimens.
Minimum Single Value: 10 ft-lbf (14 J).
Specimen Size: Standard full-size (10mm x 10mm). If sub-sized specimens must be used due to thin walls, the required energy values are proportionally reduced.
Testing & Inspection Requirements (Typical for Seamless)
Hydrostatic Test: Every length of pipe must be tested to a specified pressure without leakage.
Non-Destructive Electric Test (NDE): Seamless pipe is typically subjected to an eddy current test or ultrasonic test to detect major longitudinal imperfections.
Flattening Test, Flange Test, or Reverse Bend Test: One of these is performed on seamless pipe to check ductility.
Chemical Analysis: Check of ladle or product analysis.
Tension Test: To verify mechanical properties.
Impact Test (CVN): Mandatory for A333 Gr.6. Tests are performed on heats of steel and often by lot.
Applications
A333 Gr.6 seamless tubes are used in critical low-temperature process piping and equipment:
Liquefied Natural Gas (LNG) facilities
Cryogenic processing plants
Refrigeration systems
Cold storage piping
Skid-mounted process units for oil & gas in cold climates
Ammonia and ethylene transport lines
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