gas equipment
Gas cylinder accessories are a set of specialized tools, parts, and structures that enable the safe use, standard transport, and proper storage of pressurized cylinders. Bonyan Gas supplies and provides these peripheral pieces of equipment for professional use in factories, hospitals, laboratory centers, petrochemical industries, and gas mixing units, fully in compliance with the requirements of the Iranian National Standard (ISIRI) and international regulations for pressurized gas equipment.
Guide to Selecting Cylinder Accessories and Peripheral Equipment
Choosing the wrong, incompatible, or non-standard part in pressurized systems can, in addition to damaging sensitive equipment and wasting expensive gases, lead to irreparable financial and human safety risks. For a safe and correct selection, you should always consider the following 3 critical parameters:
🔲 Gas type and chemical properties — corrosiveness, toxicity, and flammability: The nature of the gas determines the body material and even the thread direction of the cylinder valve. For greater safety in design, flammable and fuel gases such as acetylene and hydrogen are necessarily equipped with left-hand thread valves, while neutral, asphyxiant, and oxygen gases use right-hand thread valves.
🔲 Working pressure and pressure rating: Standard gas cylinders are typically available in three pressure classes: 150, 200, and 300 bar. All selected accessories — including pressure gauges, regulators, and fittings — must be able to withstand the cylinder’s outlet pressure; otherwise, there is a risk of explosion or deformation of the parts.
🔲 Grade and end use — industrial, medical, or laboratory: Laboratory- and medical-grade equipment and accessories are made from special materials such as stainless steel or chrome-plated brass to prevent gas contamination and purity loss. Keep in mind that using industrial-grade accessories in sensitive medical and laboratory systems is not permitted under any circumstances.
Difference Between Industrial and Laboratory Equipment
There are two main grades for gas cylinder accessories:
| Criterion | Industrial Grade | Laboratory Grade |
|---|---|---|
| Body Material | Forged brass or steel | 316L stainless steel or chrome-plated brass |
| Purpose | High flow rate and pressure | Maintaining gas purity, corrosion resistance |
| Application | Welding, petrochemical | Laboratories, pharmaceutical industries, gas mixing |
| Pressure Accuracy | Standard | Higher, two-stage regulator |
Yes. Some accessories, such as cylinder pallets and bundles, are mainly manufactured to customer order. Other parts, such as valves and caps, are available in standard sizes and grades. For customization and price inquiries, please contact our experts.
Cylinder accessories must be inspected at the same time as the cylinder’s periodic inspection (usually every 5 years). In addition, any sign of corrosion, cracking, unusual discoloration, or a sudden pressure drop in the system is an immediate signal for part replacement. Using worn/deteriorated parts in pressurized gas systems is not permitted.
No. Each gas requires its own specific accessories, depending on its chemical properties, working pressure, and required purity level. For example, the accessories for flammable gases like acetylene and hydrogen are completely different from those for neutral gases like argon and nitrogen, in terms of valve thread direction and material type. Before purchasing any part, be sure to specify the type of gas in the cylinder.
For the right selection, have the following ready: gas type (to determine material and thread direction), cylinder working pressure (150, 200, or 300 bar), end use (industrial, medical, or laboratory), and quantity required. Our experts can recommend the most suitable part based on this information.