Scope of Service:

1. Complete pipeline engineering for laboratory centralized gas supply systems, including system design, selection, product supply, maintenance, and technical support for the installation and debugging of the entire system.

2. Installation of ultra-pure gas conveying systems, specialty gas cabinets (GC, GR), distribution boxes (VMB, VMP), and secondary piping construction services.

3. Gas Pressure Monitoring and Alarm System, installation and debugging of gas concentration monitoring and alarm control systems.

4. Lab pure water pipeline system installation, lab wastewater treatment system design and installation.

5. Valve Fittings: Automatic regulating and control equipment for various gas supply systems, gas regulators, stainless steel pipes of various grades (EP, BA), valves (diaphragm valves, ball valves, needle valves), safety valves, check valves, flame arrestors, sleeve joints, precision filters, and various pressure gauges.

Design Specifications for Gas Source Cylinder Room 

• Utilizes a semi-automatic switching system to ensure continuous gas supply. Guarantees the continuity of experiments.

• Multi-bottle gas supply ensures adequate gas volume.

Bottles are centrally located for easy refilling and other operations.

• No bottles in the lab, saving space and eliminating a hazard source.

• Equipped with a safety valve for guaranteed safe operation.

• Nitrogen purge function and venting feature ensure gas purity.

• Features low-pressure alarm, alerting users to replace the cylinder when the pressure drops below the operating level.

• The design of the combustible gas system includes a PLC control system, enabling联动 between the combustible gas alarm, emergency shutdown, and fan. Ensures gas safety usage.

• Different gases use different materials to ensure purity.

• Different connection methods (VCR, couplings, welding) are used based on the type of gas.

• The high-pressure section utilizes a high-pressure valve 1 for gas safety control.

Monitor System Design Description

• The gas cylinder room is equipped with gas concentration leak detectors and emergency shutdown. In case of harmful gas leakage in the cylinder room, the concentration detection alarm will trigger both audible and visual alarms, and send signals to the exhaust valve to activate the fans for air exchange, ensuring the safety of gas supply.

• Gas alarm uses 4~20mA signal and is EX-1ICT6 explosion-proof grade. Enhances safety level.

All signal lines are made with 4-core shielded cables to prevent signal interference.

• PLC internal signal input terminals are pre-set, enabling expandability and real-time display of concentration/pressure values.

• The box is equipped with a touch screen that displays the image simultaneously with the host computer. The operating system is Windows XP, which is user-friendly.

Design Based on Technical Specifications: 

GB50235-2010 "Code for Construction of Industrial Metal Pipeline Engineering"

GB50184-2011 "Code for Acceptance of Construction Quality of Industrial Metal Pipeline Projects"

GB50236-2011 Code for Construction and Acceptance of Welding Works for Field Equipment and Industrial Pipelines

JGJ 91-93 "Code for Architectural Design of Scientific Experimental Buildings"

GB50031-1991《C₂H₂Station Design Standards

GB50177-2005《H2Website Design Standards

GB50030-2007 "Oxygen Station Design Code"

GB50029-2014 "Design Code for Compressed Air Stations"

SH3063-1999 "Design Specification for Detection and Alarm Systems of Combustible and Toxic Gases in Petrochemical Enterprises" - Research Laboratory's Current Conditions Requirements and Other Relevant Standards and Norms.

Functional Column/Pipe Chute Description 

• All connecting pipelines are welded using digital welding technology, ensuring safe use. This layer has预留 openings installed in the pipeline shaft for unused gases, convenient for adding gas routes in the future.

Flammable gases are equipped with fire dampers in the pipeline shaft, enhancing safety.H2、C₂H₂、CH₄Valves for pneumatic control are designed to interface with PLCs. Each gas line is equipped with a floor main control valve.

Select different pipeline sizes based on varying gas consumption.

• The spacing of gas pipeline supports shall not exceed 1.5 meters. The support distance is determined based on the smallest inner diameter of the gas pipeline.

Design Specifications for Instrument Room Pipe Valves 

Each lab must have individual valve controls.

For instruments requiring individual pressure adjustment, a separate valve must be installed at the gas outlet point on the workbench to control it.

All gas export points are equipped with stainless steel valves and connected to pressure and flow regulators.

• H2 uses a VCR-style connector, while other gases are connected using a compression fitting.

Rooms with combustible gases are equipped with combustible gas detectors linked to a PLC.

• Gas enters the main pipeline of the room, and the installation of a gas purification system can improve the purity of the gas.