Cylinder Lead

Acetylene is very useful, as well as hazardous if not used properly. These hazards rise from its triple bond structure, and flammability. Also, these properties make acetylene suitable for welding and temperature cutting, as well as wide range of applications such as plastic production, portable lighting, etc. However, pure acetylene undergoes decomposition when overheated or compressed. Decomposition is a chemical reaction where carbon and hydrogen are produced. A tremendous amount of pressure and heat is generated during the reaction, which may trigger explosions. Hence, this gas demands careful handling.

Acetylene is dissolved in acetone at pressures up to 275 PSIG (19 bar) at 20°C (68° F). The dissolved acetylene is then packaged in special cylinders through hoses and other ancillaries. With the dangers involved in acetylene packaging, the hoses used for packaging should comply with certain industrial standards. Rexarc provides acetylene cylinder leads or hoses that have passed acetylene decomposition test, which mentioned in ISO 14113:2013 Annex A. This test is conducted to analyze the working condition of hose at extreme pressures sometimes rising up to 900 bar.

Recommended Hose Life Cycles for Acetylene Hoses

The following information shows recommended hose life cycles:

Acetylene (C2H2) Cylinder with a Working Pressure of 200 bar at 15 °C Cylinder with a Working Pressure of 300 bar at 15 °C Cylinder with a Working Pressure of 700 bar at 15 °C Other Gases
Maximum Allowable Pressure (MAWP) 25 250 375 875 –
Minimum Proof Pressure 300 Fixed Value 375 560 1050 1.5 MAWP
Bursting Pressure Minimum 1000 Fixed Value 1000 1500 2190 4 MAWP if MAWP <= 450bar * 2.5 * MAWP if MAWP > 450bar with a minimum of 1500 bar

Tips for Selection of Hoses for Acetylene Packaging

At Rexarc, our experts with their vast industry experience understand client expectations. This in-depth understanding enables us to aid clients in making the right selection of hoses for their acetylene packaging plants. The following are the two terms that play a key role in selection.

Successful Test Cycles: The lower value of the average number of U-bend and hydraulic test cycles passed
Maximum Pressurization Cycles: This is estimated on the basis of daily cycles.

Our suggestions are mainly based on the following two types

Customer Site Hose Assemblies: When used at a customer site, the hose should fulfill these requirements
The maximum pressurization cycle for metallic and plastic hoses are 1000.
Maximum service life for hoses are 5 years.

The pressurization cycles for customer site hose assemblies are estimated as per the cylinder rotation. Service life of hose assemblies will be reduced, if pressurization cycle exceeds above 1000.

Filling Center Hose Assemblies: If used at filling center, the hoses should fulfill the following requirements.
The maximum pressurization cycle for plastic hoses should not exceed 10000.
The maximum pressurization cycle for metallic hoses takes into account successful range of test cycles, and maximum pressurization cycles.
Range of Successful Test Cycles Maximum Pressurization Cycles
50000 10000
45000 – 49999 9000
40000 – 44999 8000
35000 – 39999 7000
30000 – 34999 6000
25000 – 29999 5000
20000 – 24999 4000
15000 – 19999 3000
10000 – 14999 2000

Call us today on our toll-free number 1-877-739-2721 to know more about our acetylene hose assemblies. Alternatively, you can mail us at

Safety Standards