Product Overview

This buried LPG storage tank is a pressure vessel specifically designed for the underground storage of liquefied petroleum gas (propane). The tank is engineered with a maximum allowable working pressure of 1.82 MPa and is suitable for storage media with a saturated vapor pressure not exceeding 1.63 MPa at 50°C and H₂S solubility less than 7.7 mg/L.

The pressure tank features a horizontal cylindrical design constructed from Q345R high-strength steel, with wall thicknesses ranging from 8mm to 14mm depending on capacity. The underground installation design provides enhanced safety, space efficiency, and temperature stability compared to above-ground alternatives. These tanks are widely used in city gas distribution, industrial applications, commercial fueling stations, and transportation energy supply.

Relevant Cases

Key Specifications

Parameter	Value
Installation type	Buried (underground)
Maximum allowable working pressure	1.82 MPa
Capacity range	5m³ to 200m³
Medium	LPG (propane)
Design standard	Saturated vapor pressure ≤1.63 MPa at 50°C
Material	Q345R high-strength steel

Technical Parameters

No.	Model	Shell Diameter × Length × Thickness (mm)	Head Thickness (mm)	Material	Net Weight (kg)	Total Length (mm)	Anchor Bolt Spec	Level Gauge Center Distance (mm)
1	WG 1.77-1200-5	DN1200 × 3980 × 8	8 (6.8)	Q345R	1,595	4,663	4×M20 / 3200×720	1,400
2	WG 1.77-1400-5	DN1400 × 2740 × 10	10 (8.7)	Q345R	1,780	3,535	4×M20 / 1950×840	1,600
3	WG 1.77-1400-10	DN1400 × 5980 × 10	10 (8.7)	Q345R	2,925	6,775	4×M20 / 5180×840	1,600
4	WG 1.77-1600-10	DN1600 × 4400 × 10	10 (8.8)	Q345R	2,760	5,295	4×M24 / 3400×960	1,800
5	WG 1.77-1800-15	DN1800 × 5250 × 12	12 (10.7)	Q345R	4,230	6,247	4×M24 / 4300×1120	2,000
6	WG 1.77-2000-20	DN2000 × 5650 × 12	12 (10.7)	Q345R	5,025	6,747	4×M24 / 4730×1260	2,200
7	WG 1.77-2000-25	DN2000 × 7250 × 12	12 (10.7)	Q345R	5,980	8,347	4×M24 / 6330×1260	2,200
8	WG 1.77-2200-25	DN2200 × 5770 × 12	14 (12.7)	Q345R	5,910	6,999	4×M30 / 4600×1380	2,400
9	WG 1.77-2000-30	DN2000 × 8840 × 12	12 (10.7)	Q345R	6,935	9,937	4×M24 / 7900×1260	2,200
10	WG 1.77-2200-30	DN2200 × 7080 × 12	14 (12.7)	Q345R	6,760	8,314	4×M30 / 5900×1380	2,400

Key Advantages

Material Advantages

High-Quality Steel Sourcing Raw materials are sourced from custom-rolled steel plates produced by leading domestic steel manufacturers, ensuring consistent and reliable material quality. This approach effectively reduces the number of longitudinal and circumferential welds as well as head splicing seams. The shell requires only edge trimming without generating significant scrap, improving material utilization while maintaining product quality.

Premium Welding Consumables For conventional carbon steel submerged arc welding, American Lincoln welding wire and flux are used, ensuring stable and reliable welding quality with a clean, aesthetically pleasing finish.

Superior Paint Coating Both domestic and imported paint options are available. The finished coating provides excellent weather resistance and a professional appearance.

Processing and Manufacturing Capabilities

Laser Cutting Laser cutting technology delivers high precision with tolerances within ±0.05mm, ensuring weld quality. Heat exchanger baffles can be directly laser cut without additional processing.

Plasma Welding for Stainless Steel For stainless steel with thickness ≤10mm, plasma welding is used for longitudinal and circumferential seams. This single-pass double-sided forming process reduces wire consumption, eliminates the carbon arc gouging step required by submerged arc welding, prevents carburization, and delivers a clean weld appearance with low heat input. Radiographic inspection pass rate exceeds 99%.

Automatic TIG Welding Argon arc automatic welding machines provide stable, consistent welding quality with excellent weld appearance.

Specialized Production Line Advantages

Manufacturing is organized into over ten specialized workstations:

Material cutting
Head pressing
Shell rolling
Longitudinal and circumferential seam welding
Sub-assembly and final assembly
Machining
Heat treatment
Hydrostatic testing
Sandblasting
Painting

Each workstation is staffed by specialized personnel with secondary division of labor within each process, effectively improving work efficiency and product quality.

Tank Construction

Materials and Fabrication

Main material: Q345R high-strength steel
Shell thickness: 8mm to 12mm (depending on model)
Head thickness: 8mm to 14mm (depending on model)
Design: Horizontal cylindrical with welded construction

Quality Standards

Complies with pressure vessel design codes
Suitable for LPG storage with specified vapor pressure limits
Corrosion-resistant construction for underground installation

Safety Features

Pressure relief valves
Emergency shutoff system
Liquid level gauge (magnetic or float type)
Anti-corrosion coating for underground burial
Anchoring system for stable installation

Applications

City gas distribution: Municipal LPG supply networks
Residential and commercial: Community gas stations and commercial fueling
Industrial: Chemical plants and manufacturing facilities
Transportation: Vehicle fueling stations
Specific energy supply: Remote or off-grid energy storage

Actual photo of the shipment

Frequently Asked Questions (FAQ)

Q1: What is the maximum allowable working pressure? A: The maximum allowable working pressure is 1.82 MPa.

Q2: What is the capacity range available? A: Standard models range from 5m³ to 200m³.

Q3: What material is used for the tank construction? A: The tank is constructed from Q345R high-strength steel sourced from leading domestic steel manufacturers.

Q4: What media can this tank store? A: It is designed for LPG (propane) with saturated vapor pressure ≤1.63 MPa at 50°C and H₂S solubility <7.7 mg/L.

Q5: What is the difference between buried and above-ground installation? A: Buried installation offers better temperature stability, space efficiency, and enhanced safety for certain applications.

Q6: What quality control measures are in place during manufacturing? A: Advanced processes include laser cutting, plasma welding, automatic TIG welding, and radiographic inspection with over 99% pass rate.

Q7: What paint options are available? A: Both domestic and imported paint options are available, providing excellent weather resistance and appearance.

Q8: Do you offer customization? A: Yes, custom sizes and configurations can be discussed based on project requirements.

Underground propane tank

Buried LPG Storage Tank – 5m³ to 200m³ (1.82MPa)