+8615674993216
sales@forever-steels.com
English
العربية
Low Temperature Seamless Steel Pipe (LTCS)–Premium Solutions for Cold Environments
Our Low Temperature Seamless Steel Pipes are specifically engineered to maintain superior impact toughness and structural integrity in sub-zero environments. Designed for applications where the process fluid or ambient temperature drops significantly, these pipes ensure safety and reliability under extreme thermal stress.
Common Standards and Steel Grades
We supply low-temperature pipes manufactured in strict accordance with international standards to meet the rigorous demands of the energy and chemical sectors:
ASTM A333: The standard specification for seamless and welded steel pipe for low-temperature service.
Grades: Grade 1, Grade 3, Grade 6 (most common), Grade 7, Grade 8, Grade 9.
ASME SA333: Parallel standards for pressure vessel and boiler construction.
ASTM A334: Seamless and welded carbon and alloy-steel tubes for low-temperature service.
EN 10216-4: European standard for seamless steel tubes for pressure purposes (e.g., P215NL, P265NL).
Dimensions and Size Range
Our production line covers a comprehensive range of sizes to fit diverse project requirements:
Feature Specification Range
Outer Diameter (OD): 1/4”to 36”(13.7mm–914.4mm)
Wall Thickness (WT): SCH 10, SCH 20, SCH 40, SCH 80, SCH 160, XXS (up to 60mm)
Length: Single Random (5-7m), Double Random (10-12m), or Fixed Lengths
Ends: Plain End, Beveled End, Threaded & Coupled
Key Applications
These pipes are essential components in industries where "brittle fracture" must be prevented at low temperatures:
Oil & Gas: Arctic exploration, offshore drilling platforms, and low-temperature pipeline construction.
LNG Industry: Liquefied Natural Gas terminals, storage tanks, and transport piping.
Petrochemical: Ethylene plants, refrigeration units, and cryogenic processing facilities.
Power Generation: Specialized piping for low-temp compressed air and fluid handling.
Why Choose Our Low-Temp Pipes?
Impact Tested: Every batch undergoes Charpy V-Notch impact testing at temperatures as low as -45°C (for Grade 6) or -195°C (for Grade 8).
Precision Manufacturing: Advanced heat treatment (Normalizing or Quenching & Tempering) to ensure uniform grain structure.
Full Traceability: Supplied with MTC (Material Test Certificate) according to EN 10204 3.1 or 3.2.
Chemical composition
| Element | Grade 1 | Grade 6 (Most Popular) | Grade 3 | Grade 7 | Grade 9 |
| Carbon (max) | 0.3 | 0.3 | 0.19 | 0.19 | 0.2 |
| Manganese | 0.40–1.06 | 0.29–1.06 | 0.31–0.64 | 0.90 max | 0.40–1.06 |
| Phosphorus (max) | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 |
| Sulfur (max) | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 |
| Silicon | ... | 0.10 min | 0.18–0.37 | 0.13–0.32 | ... |
| Nickel | ... | ... | 3.18–3.82 | 2.03–2.49 | 1.60–2.24 |
| Copper | ... | ... | ... | ... | 0.75–1.25 |
Dimention Tolerance
| Nominal Pipe Size (NPS) | OD Tolerance (Over) | OD Tolerance (Under) | Wall Thickness (WT) Tolerance | Length Tolerance | ||
| Single Random (SRL) | Double Random (DRL) | Fixed Length | ||||
| 1/8" to 1-1/2" | +0.4 mm (1/64") | -0.8 mm (1/32") | -12.5% (Min. Wall) | ± 500mm | ± 500mm | +6mm / -0mm |
| Over 1-1/2" to 4" | +0.8 mm (1/32") | -0.8 mm (1/32") | -12.5% (Min. Wall) | |||
| Over 4" to 8" | +1.6 mm (1/16") | -0.8 mm (1/32") | -12.5% (Min. Wall) | |||
| Over 8" to 18" | +2.4 mm (3/32") | -0.8 mm (1/32") | -12.5% (Min. Wall) | |||
| Over 18" to 36" | +3.2 mm (1/8") | -0.8 mm (1/32") | -12.5% (Min. Wall) | |||
MEchanical Properties sheet
| Grade | Tensile Strength (min) | Yield Strength (min) | Impact Test Temp. | Min. Avg. Impact (3 Spec) |
| Grade 1 | 380 MPa (55 ksi) | 205 MPa (30 ksi) | -45°C (-50°F) | 18 Joules (13 ft-lb) |
| Grade 3 | 450 MPa (65 ksi) | 240 MPa (35 ksi) | -100°C (-150°F) | 18 Joules (13 ft-lb) |
| Grade 6 | 415 MPa (60 ksi) | 240 MPa (35 ksi) | -45°C (-50°F) | 18 Joules (13 ft-lb) |
| Grade 7 | 450 MPa (65 ksi) | 240 MPa (35 ksi) | -75°C (-100°F) | 18 Joules (13 ft-lb) |
| Grade 8 | 690 MPa (100 ksi) | 515 MPa (75 ksi) | -195°C (-320°F) | 27 Joules (20 ft-lb) |
| Grade 9 | 435 MPa (63 ksi) | 315 MPa (46 ksi) | -75°C (-100°F) | 27 Joules (20 ft-lb) |
SPECIFICATION STANDARD (STEEL PIPE)
| Normal Diameter | OD(MM) | WALL THICKMESS(MM) | |||||||||||||||||
| ANSI B36.10M | ANSI B36.19M | ||||||||||||||||||
| A(MM) | B(INCH) | ASME | SCH5/5S | SCH10S | SCH10 | SCH20 | SCH30 | STD | SCH40 | SCH40S | SCH60 | XS | SCH80 | SCH80S | SCH100 | SCH120 | SCH140 | SCH160 | XXS |
| 15 | 1/2" | 21.34 | 1.65 | 2.11 | 2.11 | 2.41 | 2.77 | 2.77 | 2.77 | 3.73 | 3.73 | 3.73 | 4.78 | 7.47 | |||||
| 20 | 3/4" | 26.67 | 1.65 | 2.11 | 2.11 | 2.41 | 2.87 | 2.87 | 2.87 | 3.91 | 3.91 | 3.91 | 5.56 | 7.82 | |||||
| 25 | 1" | 33.40 | 1.65 | 2.77 | 2.77 | 2.9 | 3.38 | 3.38 | 3.38 | 4.55 | 4.55 | 4.55 | 6.35 | 9.09 | |||||
| 32 | 1.1/4" | 42.16 | 1.65 | 2.77 | 2.77 | 2.97 | 3.56 | 3.56 | 3.56 | 4.85 | 4.85 | 4.85 | 6.35 | 9.7 | |||||
| 40 | 1.1/2" | 48.26 | 1.65 | 2.77 | 2.77 | 3.18 | 3.68 | 3.68 | 3.68 | 5.08 | 5.08 | 5.08 | 7.14 | 10.15 | |||||
| 50 | 2" | 60.32 | 1.65 | 2.77 | 2.77 | 3.18 | 3.91 | 3.91 | 3.91 | 5.54 | 5.54 | 5.54 | 8.74 | 11.07 | |||||
| 65 | 2.1/2" | 73.02 | 2.11 | 3.05 | 3.05 | 4.78 | 5.16 | 5.16 | 5.16 | 7.01 | 7.01 | 7.01 | 9.53 | 14.02 | |||||
| 80 | 3" | 88.90 | 2.11 | 3.05 | 3.05 | 4.78 | 5.49 | 5.49 | 5.49 | 7.62 | 7.62 | 7.62 | 11.13 | 15.25 | |||||
| 90 | 3.1/2" | 101.60 | 2.11 | 3.05 | 3.05 | 4.78 | 5.74 | 5.74 | 5.74 | 8.08 | 8.08 | 8.08 | |||||||
| 100 | 4" | 114.30 | 2.11 | 3.05 | 3.05 | 4.78 | 6.02 | 6.02 | 6.02 | 8.56 | 8.56 | 8.56 | 11.13 | 13.49 | 17.12 | ||||
| 125 | 5" | 141.30 | 2.77 | 3.40 | 3.40 | 6.55 | 6.55 | 6.55 | 9.53 | 9.53 | 9.53 | 12.7 | 15.88 | 19.05 | |||||
| 150 | 6" | 168.28 | 2.77 | 3.40 | 3.40 | 7.11 | 7.11 | 7.11 | 10.97 | 10.97 | 10.97 | 14.27 | 18.26 | 21.95 | |||||
| 200 | 8" | 219.08 | 2.77 | 3.76 | 3.76 | 6.35 | 7.04 | 8.18 | 8.18 | 8.18 | 10.31 | 12.7 | 12.7 | 12.7 | 15.09 | 18.26 | 20.62 | 23.01 | 22.23 |
| 250 | 10" | 273.05 | 3.40 | 4.19 | 4.19 | 6.35 | 7.8 | 9.27 | 9.27 | 9.27 | 12.7 | 12.7 | 15.09 | 12.7 | 18.26 | 21.44 | 25.4 | 28.58 | 25.4 |
| 300 | 12" | 323.85 | 3.96 | 4.57 | 4.57 | 6.35 | 8.38 | 9.53 | 10.31 | 9.53 | 14.27 | 12.7 | 17.48 | 12.7 | 21.44 | 25.4 | 28.58 | 33.32 | 25.4 |
| 350 | 14" | 355.60 | 3.96 | 4.78 | 6.35 | 7.92 | 9.53 | 9.53 | 11.13 | 9.53 | 15.09 | 12.7 | 19.05 | 12.7 | 23.83 | 27.79 | 31.75 | 35.71 | |
| 400 | 16" | 406.40 | 4.19 | 4.78 | 6.35 | 7.92 | 9.53 | 9.53 | 12.7 | 9.53 | 16.66 | 12.7 | 21.44 | 12.7 | 26.19 | 30.96 | 36.53 | 40.49 | |
| 450 | 18" | 457.20 | 4.19 | 4.78 | 6.35 | 7.92 | 11.13 | 9.53 | 14.27 | 9.53 | 19.05 | 12.7 | 23.83 | 12.7 | 29.36 | 34.93 | 39.67 | 45.24 | |
| 500 | 20" | 508.00 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | 9.53 | 15.09 | 9.53 | 20.62 | 12.7 | 26.19 | 12.7 | 32.54 | 38.1 | 44.45 | 50.01 | |
| 550 | 22" | 558.80 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | 9.53 | 22.23 | 12.7 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | ||||
| 600 | 24" | 609.60 | 5.54 | 6.35 | 6.35 | 9.53 | 14.27 | 9.53 | 17.48 | 9.53 | 24.61 | 12.7 | 30.96 | 12.7 | 38.89 | 46.02 | 52.37 | 59.54 | |
| 650 | 26" | 660.40 | 7.92 | 12.7 | 9.53 | 12.7 | |||||||||||||
| 700 | 28" | 711.20 | 7.92 | 12.7 | 15.88 | 9.53 | 12.7 | ||||||||||||
| 750 | 30" | 762.00 | 6.35 | 7.92 | 12.7 | 15.88 | 9.53 | 12.7 | |||||||||||
| 800 | 32" | 812.00 | 7.92 | 12.7 | 15.88 | 9.53 | 17.48 | 12.7 | |||||||||||
| 850 | 34" | 863.60 | 7.92 | 12.7 | 15.88 | 9.53 | 17.48 | 12.7 | |||||||||||
| 900 | 36" | 914.40 | 7.92 | 12.7 | 15.88 | 9.53 | 19.05 | 12.7 | |||||||||||
Low Temperature Seamless Steel Pipe Production Process
