Scope of Service:

1. Comprehensive pipeline engineering for laboratory centralized gas supply systems, including the entire process from design, selection, product supply, maintenance, and technical support to installation and debugging.

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. Supply and installation of laboratory pure water piping systems, design and installation of laboratory wastewater treatment systems.

5. Pipe valves: Automatic regulating control equipment for various gas supply systems, gas regulators, valves in 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.

Gas Source Cylinder Room Design Description 

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

• Multi-bottle gas supply ensures sufficient gas usage.

• Cylinders are arranged in a centralized location for convenient refilling operations.

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

• Equipped with a safety valve for safe operation.

• Features nitrogen blow-off and venting functions to ensure gas purity.

• Features low-pressure alarm function; alerts users to replace the cylinder when the pressure drops below the operating level.

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

• Different gases are contained in materials specific to each, ensuring purity.

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

• The high-pressure section is equipped with a high-pressure valve 1 to ensure safe gas usage.

Monitoring System Design Description

• The gas cylinder room is equipped with gas concentration leak detectors and emergency shut-offs. In the event of harmful gas leakage, the concentration detection alarm will trigger an audible and visual alarm, simultaneously signaling the exhaust valve to open, activating the fan for air exchange to ensure safe gas supply.

• Gas alarms use a 4-20mA signal and are explosion-proof level EX-1ICT6. Enhanced safety rating.

• 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 enabling 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, making it easy to operate.

Design Based on Technical Specifications: 

GB50235-2010 "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《C₂H₂Website Design Standards

GB50177-2005《H2Website Design Standards

GB50030-2007 "Oxygen Station Design Specification"

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

SH3063-1999 "Design Specification for Detection and Alarm of Combustible and Toxic Gases in Petrochemical Enterprises" - Research Laboratory's Existing 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. Unused gases in this layer are equipped with reserved outlets in the pipeline shaft, convenient for future gas route additions.

Flammable gases are equipped with fire extinguishers in the pipe wells, enhancing safety coefficients.H2、C₂H₂、CH₄Valves for pneumatic control systems are designed to interface with PLCs. Each gas line is equipped with a floor main control valve.

Select pipe sizes based on varying gas consumption requirements.

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

Design Description for Indoor Pipe Valves for Instruments 

Each lab must have individual valve control.

For instruments requiring separate pressure adjustments, 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.

In rooms with combustible gases, a combustible gas alarm is used in conjunction with a PLC.

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