CNG Cylinder Cascade Semi-Trailer
The CNG Cylinder Cascade Semi-Trailer (also known as a high-pressure gas tube trailer) is an ultra-heavy-duty commercial transport trailer engineered specifically for the safe, high-capacity road transportation and bulk distribution of compressed natural gas (CNG) from terminal filling stations to city gate stations, industrial hubs, and secondary storage cascades. Built with a rigid, high-strength structural steel skeletal frame (Q345B/Q550), it houses a series of large-diameter, seamless high-pressure steel cylinders (manufactured from 34CrMo4 alloy steel) manifolded together with high-pressure stainless steel tubing and precision control valves. Engineered to operate under extreme working pressures of 20.0 MPa to 25.0 MPa (200–250 bar), it features comprehensive safety relief systems, emergency shut-off valves, burst discs, and pressure monitoring gauges. Paired with 3 commercial axles, heavy-duty air ride or mechanical suspension, and dual-line WABCO ABS/EBS pneumatic braking, it delivers exceptional highway stability, structural integrity, and hazardous gas transport safety. Fully certified under ADR, ISO11120, ASME, ISO9001, CCC, CE, DOT, and SGS standards.
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Product Details
Technical Specifications
Model NO. : Customized
Type : Semi-Trailer / CNG High-Pressure Tube Trailer
Total Water Capacity : 20,000 Liters to 35,000 Liters (Customizable per Gas Volume Requirement)
Condition : New
Grade : Heavy Duty / High-Pressure Gas Transport Grade
Shape : Skeletal Frame with Longitudinal Seamless Cylinder Cascade
Origin : Shandong, China
Production Capacity : Customized
Certifications : ADR / ISO11120 / ASME / ISO9001 / CCC / CE / DOT / SGS
HS Code : 8716399000
Overall Dimensions : 12000-14000 x 2500 x 3600-3900 mm
Cylinder Material : Seamless Chromium-Molybdenum Alloy Steel (34CrMo4)
Cylinder Quantity & Spec : 8 to 12 Large-Diameter Seamless Cylinders (Working Pressure: 20.0 MPa / 25.0 MPa)
Test Pressure : 30.0 MPa / 37.5 MPa
Kingpin : JOST 2-inch or 3.5-inch Bolted/Welded Kingpin
Landing Gear : JOST / FUWA Two-Speed Manual Landing Gear (28T Capacity)
Wheel Base : 6800mm + 1310mm + 1310mm
Tread : 1820 mm / 2050 mm
Axle Number : 3 Axles
Axle Brand : FUWA / BPW / HuaJin Heavy Duty
Axle Capacity : 13T / 16T per axle
Tire Number : 12
Tire Specification : 12R22.5 / 385/65R22.5 Tubeless Heavy-Duty Tires
Tire Brand : Triangle / Double Coin / Michelin / Bridgestone
Rim : 9.00-22.5 / 11.75-22.5 Steel Disc Rims
Suspension : Heavy Duty Air Ride Suspension / Mechanical Multi-Leaf Spring Suspension
Brake System : Dual-Line Pneumatic Air Braking System with ABS / EBS
ABS/EBS Brand : WABCO / Haldex
Self-dumping : Not Self-dumping
Main Frame Material : High-Strength Low-Alloy Structural Steel (Q345B/Q550)
Welding : Automated Submerged-Arc Welding & Precision Shielded Structural Welding
Manifold System : High-Pressure Stainless Steel Tubing, Ball Valves, Check Valves, and Filling/Discharge Ports
Safety Equipment : Pressure Relief Valves, Burst Discs, Pressure Gauges, Grounding Reel, Fire Extinguishers
Spare Tire Carrier : 1-2pcs
Tool Box : 1pcs Heavy-Duty Lockable Steel Box
Electric System : 24V, 7 Pin Socket, Explosion-Proof LED Marker & Tail Lights
Wiring Harness : Armored Weatherproof Lines
Painting / Finish : Sand Blasting + Epoxy Anti-Corrosion Primer + UV-Resistant Polyurethane Topcoat (High-Visibility Warning Finish)
Colour : Custom RAL Code / Compressed Gas Hazard Placards & Warning Decals
Warranty : Skeletal Frame 3Y / High-Pressure Cylinders & Valves 1Y
Package : Nude Packing / Bulk Vessel / Ro-Ro
Delivery Time : 40-45 Working Days
Payment Terms : T/T, L/C
Key Structural & Performance Features
1. High-Pressure Seamless Cylinders & Manifold Architecture
- Certified 34CrMo4 Alloy Cylinders: Equipped with massive, large-diameter seamless steel cylinders forged from high-purity chromium-molybdenum steel, heat-treated to withstand high cyclic fatigue and operating pressures up to 25.0 MPa (250 bar).
- High-Pressure Stainless Steel Manifold: Gas distribution is managed through heavy-duty stainless steel manifolds featuring high-pressure ball valves, check valves, and standardized filling/discharge quick-connect couplings.
- Rigid Cradle Mounting System: Each cylinder is securely anchored within precision-machined heavy steel cradles equipped with vibration-damping rubber inserts, preventing stress concentration and chafing during rough road transport.
2. Comprehensive Safety Valving & Pressure Relief
- Multi-Tier Safety Protection: Outfitted with calibrated pressure relief valves and thermal fuse burst discs on every cylinder to automatically vent gas safely in the event of over-pressurization or external fire exposure.
- Emergency Shut-Off Integration: Centralized high-pressure control panel allows operators to isolate individual cylinder banks or shut down the entire cascade instantly during loading and unloading operations.
- Static Discharge & Grounding Protocols: Features continuous copper grounding straps, static discharge reels, and spark-free electrical fittings to eliminate electrostatic ignition risks.
3. Structural Skeletal Chassis & Running Gear
- High-Tensile Skeletal Backbone: Built with a heavy-duty Q345B/Q550 structural steel ladder frame engineered to absorb the immense dead weight of high-pressure cylinders while resisting highway torsional flexing.
- WABCO ABS/EBS Pneumatic Braking: Dual-line air braking system incorporating WABCO ABS/EBS and emergency relay valves, ensuring synchronized, dependable stopping power under full gas load ratings.
- Adjustable Air/Spring Suspension: Paired with heavy-duty mechanical leaf springs or adjustable air ride suspension to cushion sensitive high-pressure assemblies from severe road shocks.
Commercial & Logistics Terms
- Warranty Policy: 3-Year warranty for the main structural skeletal chassis frame; 1-Year warranty for high-pressure cylinders, valves, and running gear.
- Delivery Lead Time: 40 – 45 working days upon order confirmation and engineering drawing approval.
- Packaging & Shipping: Nude packing; shipped via Bulk Cargo vessel or Ro-Ro vessel.
- Payment Terms: T/T (Telegraphic Transfer), L/C (Letter of Credit).
