详情描述

Service Scope:

1. Laboratory Central Gas Supply System Pipeline Engineering, including the entire system's installation and debugging from design, selection, product supply, maintenance, and technical support.

2. Installation of ultra-pure gas conveying systems, including 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. Pipe Valves: Automatic regulating and control equipment for various gas supply systems, gas regulators, valves for all grades of stainless steel pipes (EP grade, BA grade), including 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 

• Equipped with a semi-automatic switching system to ensure continuous gas supply. Guarantees the continuity of the experiment.

• Multi-bottle gas supply ensures adequate gas usage.

Bottles are centrally located for easy refilling and other operations.

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

• Equipped with a safety valve for guaranteed safe operation.

• Nitrogen blow-off and venting functions ensure purity of gas use.

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

• The design of the flammable gas system features a PLC control system, enabling联动 of the flammable gas alarm with emergency shutdown and fan control to ensure safe gas usage.

• Different gases use different materials to ensure purity.

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

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


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 both sound and light alarms and send signals to the exhaust valve, activating the fan to exchange air, ensuring the safety of gas supply.

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

• 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 Engineering"

GB 50184-2011 "Code for Acceptance of Construction Quality of Industrial Metal Pipeline Projects"

GB50236-2011 Specification for Construction and Acceptance of Welding for Field Equipment and Industrial Pipeline Works

JGJ91-93 "Code for Architectural Design of Scientific Experimental Laboratories"

GB50031-1991《C₂H₂Station Design Specifications

GB50177-2005《H2"Site Design Specifications"

GB 50030-2007 "Code for Design of Oxygen Station"

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

SH3063-1999 "Design Code for Detection and Alarm Systems of Combustible and Toxic Gases in Petrochemical Enterprises" - Laboratory's existing conditions requirements and other relevant standards and specifications.


Functional Column/Pipe Chute Description 

• All connecting pipelines are welded using digital welding technology, ensuring safe usage. This layer has预留 openings installed in the pipeline shaft for the gases not currently in use, facilitating the addition of gas routes in the future.

Flammable gases are equipped with fire arresters in the pipeline shaft, enhancing safety.H2、C₂H₂、CH₄Valves for pneumatic control are designed to be linked with PLC. Each gas installation features a floor main control valve.

Select pipelines of different sizes based on varying gas consumption.

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


Design Specifications for Instrument Room Pipe Valves 

Each lab must have a separate valve control.

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

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

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

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

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