This high-performance Liquefied Natural Gas (LNG) semi-trailer is engineered for high-efficiency and safety-critical domestic highway transportation. Boasting a total maximum authorized mass of 40,000 kg and an optimized unladen kerb mass of 15,500 kg, the vehicle delivers an exceptional maximum authorized payload capacity of 24,500 kg. Structurally balanced, the gross weight distribution allocates 16,000 kg to the front axle assembly and 24,000 kg across the rear axle configuration. Designed to meet strict operational safety margins, the semi-trailer achieves a design speed limit of 80 km/h on flat straightaways and 20 km/h during cornering, while maintaining an excellent lateral roll stability angle of 23 degrees or greater under full-load conditions. External physical dimensions span an overall length of 13,315 mm, a width of 2,530 mm, and a height of 3,820 mm, exhibiting a highly integrated profile with a calculated service life expectancy of 10 years.

high-performance Liquefied Natural Gas (LNG) semi-trailer

At the core of the vehicle is a 52.5 m³ cryogenic storage vessel specifically adapted for highly explosive LNG media. The inner shell container is constructed from high-grade S30408 austenitic stainless steel to withstand operating temperatures ranging from -162°C down to -130°C and design working temperatures ranging from -162°C to 50°C. The enclosure heads utilize resilient Q345R pressure vessel steel plates. Operating under a working pressure threshold of 0.60 MPa or less, the tank features a design pressure envelope rating of 0.6/-0.1 MPa and a filling ratio capacity of 466.6 kg/m³, verified through a rigid hydrostatic test pressure of 0.71 MPa and pneumatic airtightness testing at 0.6 MPa.

Operational safety and containment integrity are guaranteed via a multi-layered redundant protection framework. The emergency shut-off layout utilizes a synchronized combination of emergency shut-off valves and excess flow restriction valves (Model configurations: DJQ-50B2, DJQ-40B2, and DJQ-32B2). These systems utilize an integrated mechanical/pneumatic actuation mechanism capable of achieving absolute closure in 5 seconds or less, backed by a thermal safety system designed to fuse at 75±5°C. Primary overpressure mitigation is handled via a low-temperature, full-lift safety valve (Model DA22Y-40P) rated at a nominal pressure of 4 MPa, a seat diameter of 15 mm, a set pressure of 0.65 MPa, and a rated discharge pressure of 0.76 MPa or less, with a reseating pressure threshold of 0.585 MPa or greater.

high-performance Liquefied Natural Gas (LNG) semi-trailer

The physical chassis and running gear combine heavy-duty industry-standard components to guarantee mechanical longevity. The premium base structure incorporates a 50# JOST kingpin alongside high-capacity 10T BPW axles fitted with a 12-tyre dual vacuum wheel layout mounted on premium aluminum alloy rims. Suspension stability is managed via a dedicated 12-row BPW air suspension unit without lift functionality. Auxiliary loading systems utilize an intuitive gravity-fed discharge scheme coupled with premium valves sourced from Shanghai Baibang or Chengdu Chuanxi. Enhanced vehicle safety and structural monitoring are rounded out by an integrated Knorr-Bremse EBS module, high-strength steel side protection guards, a DZHF-1 differential pressure liquid level gauge with a 0~1500WC span, a YN-100 pressure gauge, and an HTY1250 electrostatic grounding strip.

Semi-trailer	Chassis Model	–
	Tractor Model	–
	Engine Power (kW)	–
	Complete Vehicle Kerb Mass (kg)	15500
	Maximum Authorized Payload Mass (kg)	24500
	Total Full-Load Mass (kg)	40000
	Full-Load Axle Load Distribution (kg)	Front Axle: 16000

		Rear Axle: 24000
	Design Speed Limit	Flat Straight Road: 80km/h

		Cornering: 20km/h
	Front Overhang / Rear Overhang (mm)	-/1785
	Approach Angle / Departure Angle (°)	-/15°
	Max. Lateral Roll Stability Angle at Full Load (°)	≥23°
	External Dimensions (L×W×H) (mm)	13315×2530×3820
	Anticipated Design Service Life (Years)	10
	Transportation Mode	Domestic Highway Transportation
Tank Body	Medium	LNG / Liquefied Natural Gas
	Characteristics	Highly Explosive
	Operating Temperature (°C)	-162 ~ -130
	Design Temperature (°C)	-3.24
	Working Pressure (MPa)	≤0.60
	Design Pressure (MPa)	0.6/-0.1
	Welded Joint Coefficient	1
	Shell Material	S30408
	Enclosure Head Material	Q345R
	Volume (m³)	52.5
	Medium Unit Filling Ratio (kg/m³)	466.6
	Hydrostatic Test Pressure (MPa)	0.71
	Pneumatic Airtightness Test Pressure (MPa)	0.6
Emergency Shut-off Device	Model & Specification	DJQ-50B2, DJQ-40B2, DJQ-32B2
	Type	Combination of Emergency Shut-off Valve & Excess Flow Restriction Valve
	Operation Mechanism / Mode	Mechanical / Pneumatic
	Closure Time	≤5S
	Fusible Temperature (°C)	75±5
Safety Valve / Rupture Disk	Model	DA22Y-40P
	Type	Low Temperature, Full Lift Type
	Nominal Pressure (MPa)	4
	Valve Seat Diameter (mm)	15
	Safety Valve Set Pressure (MPa)	0.65
	Safety Valve Rated Discharge Pressure (MPa)	≤0.76
	Safety Valve Reseating Pressure (MPa)	≥0.585
	Rupture Disk Discharge Diameter (mm)	–
	Rupture Disk Bursting Pressure (MPa)	–
Loading/Unloading Device	Gas Phase Model / Liquid Phase Model	Gas: DJ661F-40P

		Liquid: DJ661F-40P
	Gas Phase / Liquid Phase Specification	Gas: DN40
	Gas Phase / Liquid Phase Specification	Liquid: DN50、DN32
	Type	Flanged Connection
	Nominal Pressure (MPa)	2.5
	Electrostatic Grounding Strip	HTY1250
Liquid Level Gauge	Model	DZHF-1
	Type	Differential Pressure Liquid Level Gauge
	Nominal Pressure (MPa)	2.5
	Measurement Range (mm)	0 ~ 1500WC (0 ~ 15KPp)
	Accuracy Class	2.5
Pressure Gauge	Model	YN-100
Standard Configuration	(1) Kingpin	50# JOST
	(2) Axles	10T, BPW
	(3) Tyres	Dual Vacuum Tyres (12 units)
	(4) Rims	Aluminum Alloy
	(5) Suspension	BPW Air Suspension (Non-lifting)
	(6) Loading/Unloading Method	Gravity Discharge (Self-flow)
	(7) Landing Gear	JOST
	(8) Valve Brand	(Shanghai Baibang / Chengdu Chuanxi)
	(9) Side Guards	High-Strength Steel
	(10) Toolbox	Aluminum Alloy
	(11) EBS	Knorr-Bremse (Knorr)
	(12) Mudguard Brackets	Aluminum Alloy

Tag: LNG semi-trailer

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