Completely carbon fibre wrapped special plastic inside of the cylinder.
Since 2007, DSW Industry has produced high-quality composite cylinders and CNG gas cylinders at competitive prices.
Compressed Composite Cylinders are used regularly in science and engineering buildings, machine shops, and retail and campus dining.
These carbon composite oxygen bottles are designed for professional firefighters and EMTs.
These cylinders are compact, durable, and resistant to cracking and tearing.
Researchers, staff, and contractors store and use various compressed gases for different reasons.
CNG Composite Cylinders
CNG is compressed natural gas.
Natural gas coming from the natural gas pipeline at a pressure min. 2, max 20 bar, and used in houses and industries is increased to 200 bar pressure by a CNG compressor.
CNG cylinders can store natural gas under pressure 20MPa or 25MPa and are made of 4130X seamless steel tubes with ISO9809-1/ISO9809-3/EN/DOT approval.
They are explosive pressure vessels containing flammable and combustible gases.
The storage pressure for automotive cylinders is 20MPa.
CNG COMPOSITE CYLINDERS (TYPE IV)
Seamless polymer, welding free
The internal shell is made of special gas-tight PE.
Special design boss
Corrosion-free PE liner
High-pressure resistant carbon fibre wrapped outer liner.
%70 lighter than Type I, II and III.
Light weight reduces transport and work costs
Fatigue-resistant non-metallic liner
20 years of service life
Application on wide range vehicles: cars, buses, trucks, forklifts, boats, ships, locomotives, etc
Tailor-made productions to meet customers’ needs.
Production complies with certifications
Work pressure 207 bar
Test pressure 300 bar
Explosion pressure 470 bar
During the loading of natural gas, pressure should reach 216 bar. Safety above international standards is provided.
Cylinders are calibrated according to pressure above 300 bar and are designed to resist 450 bar.
The test period for cylinders should be five years.
Tested cylinders are labelled. Retested and relabeled cylinders can be used for five years or more.
Lightweight Composite Gas Cylinders
DSW’s high-integrity composite cylinders feature high capacity and lighter weights throughout the range.
The ultra-lightweight composite cylinder range provides unrivalled portability
There are four categories available in CNG gas cylinders.
The first category is seamless alloy steel cylinders (CNG-1).
CNG-2 is a composite gas cylinder with steel or aluminum lining and a barrel reinforced
with long fibers impregnated with “hoop winding” resin.
The third category is composite cylinders with aluminum liner plus carbon fiber fully
wound and glass fiber ring wound reinforcement (CNG-3).
The fourth category is the composite tanks with plastic liner plus carbon fiber
full winding and glass fiber ring winding reinforcement (CNG-4).
Each of these Compressed Gas cylinders has its advantages and disadvantages, and it depends.
Most cylinders are made of steel, usually from high-quality chrome-molybdenum.
The ISO 11439 and ECE R110 standards can meet the requirements of most countries.
A complete automotive CNG cylinder has a cap, a valve, and a safety relief device.
The cap protects the valve, and the safety relief device on the valve should be of
the rupture disc-fusible plug combination type.