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40FT Iso Tank Container

40FT ISO Tank Containers for Cryogenic Liquefied Gases & High-Volume Liquids

40FT ISO and SWAP Body tank containers engineered to ASME Section VIII, ISO 1496-3, TPED, and UN Portable Tank specifications (T50, T75, T11 SWAP). Featuring capacities from 35,000 L to 52,000 L, these pressure vessels optimize payload efficiency for LNG, LIN, LOX, LAR, LPG, refrigerants, and low-density bulk liquids across marine, rail, and road transport networks.

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Technical Specifications

Parameter	40FT T75 Cryogenic LNG Tank	40FT T50 High-Pressure Gas Tank	40FT SWAP Body Liquid Tank
Nominal Capacity	40,000 L to 46,000 L	42,000 L to 48,000 L	35,000 L to 52,000 L
Outer Dimensions (L x W x H)	12,192 x 2,438 x 2,591 mm (40 feet x 8 feet x 8 feet 6 inches)	12,192 x 2,438 x 2,591 mm	12,192 x 2,550 x 2,670 mm (SWAP)
ISO / Frame Code	42K2 / 42T9	42T8	4 EG / SWAP Body Class
Maximum Allowable Working Pressure (MAWP)	7.0 bar / 10.0 bar / 17.0 bar	24.5 bar to 34.5 bar	2.65 bar to 4.0 bar
Test Pressure	1.3x to 1.5x MAWP	1.5x MAWP (up to 51.8 bar)	6.0 bar
Design Temperature Range	-196°C to +50°C	-40°C to +55°C	-40°C to +130°C
Inner Shell Material	Stainless Steel 304L / 316L	High-Yield Carbon Steel (SA-612/P460)	AISI 316L (1.4404)
Outer Jacket Material	Carbon Steel (Q345R / S355J2)	N/A (Single Shell)	N/A (Single Shell + Insulation optional)
Nominal Shell Thickness	Inner: 6.0 to 8.0 mm; Outer: 5.0 to 6.0 mm	12.0 mm to 16.5 mm + corrosion allowance	4.0 mm to 4.8 mm + surge baffles
Tare Weight	11,500 kg plus or minus 3 percent	12,800 kg to 14,200 kg	4,800 kg to 5,600 kg
Max Gross Weight (MGW)	36,000 kg to 39,000 kg	36,000 kg to 38,000 kg	36,000 kg to 39,000 kg
Vacuum Insulation Level	Less than or equal to 0.05 Pa (5 x 10^-3 mbar after evacuation)	N/A	N/A
Baffles / Compartments	Multi-layer wrap / internal ring stiffeners	Unbaffled or custom surge plates	3 to 4 transverse surge baffles
Valves & Primary Control	Herose / RegO cryogenic globe valves, dual PRV	Fort Vale / RegO gas valves with EST	Fort Vale 3 inch or 4 inch bottom discharge
Safety Systems	Dual relief valves with 3-way changeover valve	Internal hydraulic/pneumatic emergency valves	Pressure/Vacuum relief valve (3 inch BSP)

Primary Applications

Energy Logistics

Intermodal distribution of LNG for off-grid industrial power, marine bunkering feeder supplies, and remote gasification stations.

Industrial Gases

Bulk transport of liquid nitrogen, oxygen, argon, and CO2 for steelmaking, electronics, medical facilities, and chemical processing.

Petrochemical & LPG Supply

Regional and cross-border distribution of propane, butane, anhydrous ammonia, and chemical gases.

High-Volume Liquid Shipping

Transcontinental transport of low-density chemicals, biofuels, ethanol, and bulk food-grade liquids requiring maximum volumetric payload per container.

Customization Options

We tailor 40FT tank designs to balance tare weight, volumetric capacity, and regional road weight regulations:

Frame & SWAP Configurations: 40FT ISO full-frame, beam-frame, or European 7.15m / 7.82m / 12.2m SWAP Body structures with top/bottom corner castings.

Cryogenic Performance Enhancements:

Aluminum foil and fiberglass multi-layer insulation (30 to 50 layers).
Molecular sieve vacuum getter packs to preserve long-term vacuum integrity.
Integrated ambient air vaporizers for direct gas discharge.

Heating & Temperature Maintenance: Longitudinal steam heating channels or electric trace heating systems for temperature-sensitive liquid cargoes.

Baffle & Compartment Designs: Single or multi-compartment shells fitted with removable or welded surge baffles certified to EN 14025.

Valve Cabinet Upgrades: Stainless steel 304/316 valve enclosures, side-mounted or rear-mounted control panels, flow meters, level gauges (Teletronic/WIKA), and remote telemetry GPS tracking.

Manufacturing Quality & Compliance

Our dedicated pressure vessel production lines utilize cold-stretching technology for cryogenic inner tanks and automated submerged arc welding (SAW) for thick-wall carbon steel gas shells.

Material Inspection (PMI, Ultrasonic, Impact Testing at -196°C) --> 2. Automated Shell Welding (Longitudinal & Circumferential SAW) --> 3. 100 percent NDT (Radiographic RT & Ultrasonic UT)

Third-Party Stamping (BV / LR / DNV / ASME Issued) <-- 5. Vacuum Bake-out & Mass Spectrometer Leak Test <-- 4. Hydrostatic & Post-Weld Heat Treatment (PWHT)

Quality Controls & Testing Protocols：

Deep Cryogenic Impact Testing

Charpy V-notch impact testing performed at -196°C on all stainless steel plates and weld seams for T75 tanks.

Non-Destructive Testing (NDT)

100 percent Radiographic Testing (RT) on longitudinal and circumferential pressure boundary seams; Magnetic Particle Testing (MT) or Dye Penetrant (PT) on load-bearing frame welds.

Post-Weld Heat Treatment (PWHT)

Full thermal stress relief in automated furnaces for T50 carbon steel pressure vessels to eliminate stress corrosion cracking risks.

Vacuum Integrity Verification

Helium mass spectrometer leak detection (sensitivity down to 1 x 10^-9 mbar*L/s) combined with multi-day high-temperature vacuum bake-out.

Frame Load & Stacking Tests

Structural testing compliant with ISO 1496-3, including 9-high stacking tests (up to 86,400 kg per corner post) and longitudinal racking tests.

Our Certificate

FAQ

Q: Why choose a 40FT ISO / SWAP tank container over two 20FT ISO tanks?

A: A 40FT tank container provides up to 52,000 L of volumetric capacity, compared to 24,000 L to 26,000 L in a single 20FT unit. For cryogenic gases (LNG/LIN) or low-density liquids, a 40FT container significantly reduces per-liter shipping costs, tractor unit requirements, and port handling fees per volume unit shipped.

Q: How do you maintain vacuum pressure and hold time in 40FT T75 cryogenic tanks?

A: Vacuum preservation relies on three elements: high-grade multilayer insulation (aluminum foil and glass fiber paper), internal palladium getter material to absorb residual hydrogen and outgassing, and a multi-day thermal vacuum bake-out process. This achieves hold times exceeding 80 days for LNG under standard ambient conditions.

Q: What is the difference between an ISO 40FT frame and a SWAP Body tank container?

A: A standard 40FT ISO frame fits standard 40FT container chassis and top-lift stackers (corner dimensions 12,192 x 2,438 mm). A SWAP Body tank (common in European intermodal transport) utilizes a wider/larger footprint (up to 2,550 mm wide and 12,200 mm to 13,600 mm long) to maximize volumetric capacity, featuring both ISO corner positions and dedicated folding support legs.

Q: What safety systems are equipped on 40FT T50 LPG and ammonia tanks?

A: T50 units feature a closed valve cabinet with pneumatic emergency shut-off valves (ESV), thermal fusible links that trigger auto-closure above 100°C, dual safety relief valves mounted on three-way changeover valves (allowing maintenance without depressurizing the tank), and internal excess flow valves.

Q: What documentation is provided with a 40FT tank container delivery?

A: Each container is supplied with a comprehensive Manufacturer's Data Package (MDP), containing:
Third-party inspection certificate (BV, LR, or DNV) with TPED Pi-Mark or ASME U-Stamp.
Initial 2.5-year and 5-year pressure and leak test certificates.
Mill Test Certificates (EN 10204 3.1) for shell, outer jacket, and frame structural steel.
Cryogenic impact test, Radiography (RT), and Helium leak test reports.
Vacuum level performance logs and calibration records for valves and gauges.

Q: What is the manufacturing lead time for 40FT cryogenic or high-pressure tanks?

A: Standard 40FT T75 LNG/LIN and 40FT T50 gas containers have a manufacturing lead time of 8 to 12 weeks due to cryogenic raw material procurement, cold-stretching, and extended vacuum bake-out cycles. Custom SWAP body liquid tanks require 6 to 8 weeks.

As one of the most professional 40ft iso tank container manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to buy advanced 40ft iso tank container in stock here from our factory. We also accept customized orders.

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