Service Scope:

1. Laboratory centralized gas supply system pipeline engineering, encompassing the entire system's installation and commissioning, including design, selection, product supply, maintenance, and technical support.

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

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

4. Installation of laboratory pure water pipeline supply systems, design and installation of laboratory wastewater treatment systems.

5. Valve Components: Automatic regulating and controlling equipment for various gas supply systems, gas regulators, valves of various grades of stainless steel pipes (EP grade, BA grade) including diaphragm valves, ball valves, needle valves, safety valves, check valves, flame arresters, sleeve unions, 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 sufficient gas usage.

Bottles are arranged in a centralized location for easy refilling operations.

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

• Equipped with a safety valve to ensure safe operation.

• Nitrogen blow-off feature and venting function ensure purity of the gas used.

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

• The flammable gas design includes a PLC control system, which can link the flammable gas alarm with emergency shutdown and fan operation to ensure safe gas use.

• Different gases use different materials to ensure purity.

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

• The high-pressure section is controlled by high-pressure valves 1 to ensure gas safety.

Monitoring System Design Description

• Gas concentration leak detectors and emergency shut-offs are installed in the cylinder room. In case of harmful gas leaks, the concentration detection alarm will trigger an audible and visual alert, and simultaneously signal the exhaust valve to activate the fan for air exchange, ensuring safe gas supply.

• The gas alarm uses a 4~20mA signal and is explosion-proof level EX-1ICT6, enhancing the safety grade.

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

• PLC internal signal input terminals are pre-provided, ensuring expandability and the ability to display concentration/pressure values in real-time.

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

Design based on technical specifications: 

GB 50235-2010 "Code for Construction of Industrial Metal Pipeline Projects"

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

GB50236-2011 "Code for Construction and Acceptance of Field Equipment and Industrial Pipeline Welding Engineering"

JGJ 91-93 "Code for Architectural Design of Scientific Laboratories"

GB50031-1991《C₂H₂Station Design Standards

GB50177-2005《H2"Station Design Specifications"

GB50030-2007 "Code for Design of Oxygen Stations"

GB50029-2014 "Code for Design of Compressed Air Stations"

SH3063-1999 "Design Specification for Detection and Alarm of Combustible and Toxic Gases in Petroleum and Chemical Enterprises" - Research Laboratory's Existing Conditions Requirements and Other Relevant Standards and Regulations.

Functional Column/Pipe Shaft Description 

• All pipeline connections are made with digital welding technology, ensuring safety in use. Unused gases in this layer are equipped with预留 outlets in the pipeline shaft for future expansion of gas routes.

Flammable gases are equipped with fire arresters in the pipeline wells, enhancing safety coefficients.H2、C₂H₂、CH₄Valves for pneumatic control, ready for design, and PLC integration. Each gas line is equipped with a floor master control valve.

Select different pipe sizes based on varying gas consumption.

• Gas pipeline supports should be spaced no more than 1.5 meters apart. Determine the support distance based on the smallest diameter gas pipeline.

Design Instructions for Instrument Room Pipe Valves 

Each laboratory 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.

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

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

• Gas enters the main pipeline in the room, and a gas purification system is installed to enhance the purity of the gas.