详情描述

Service Scope:

1. Laboratory centralized gas supply system pipeline engineering, encompassing the entire process from design, selection, product supply, maintenance, and technical support to installation and debugging of the entire system.

2. Installation of ultra-high purity gas conveyance 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 debugging of gas concentration monitoring and alarm control systems.

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

5. Pipeline Valves: Automatic regulating and control equipment for various gas supply systems, gas regulators, valves (diaphragm valves, ball valves, needle valves) in various grades of stainless steel pipes (EP grade, BA grade), 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 sufficient gas volume.

Bottles are centrally arranged for easy refilling operations.

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

• Equipped with a safety valve for secure operation.

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

• Features low-pressure alarm, notifying users to replace the cylinder when it falls below the operating pressure.

• 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 safe gas usage.

• Different gases are used with different materials to ensure purity.

• Different connection methods (VCR, couplings, 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.


Monitor System Design Specification

• The gas cylinder room is equipped with gas concentration leakage alarms and emergency cutoffs. In case of harmful gas leakage, the concentration detection alarm will sound and flash, simultaneously signaling the exhaust valve to open, activating the fan 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 all reserved, ensuring expandability and the ability to display concentration/pressure values in real-time.

• 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 for Industrial Metal Pipeline Projects"

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

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

GB50031-1991《C₂H₂Website Design Standards

GB50177-2005《H2Station Design Standards

GB50030-2007 "Oxygen Station Design Code"

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

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


Functional Column/Pipe Chute Description 

• All connecting pipelines are焊接 using digital welding technology, ensuring safe operation. Unused gases in this layer are equipped with reserved outlets in the pipeline shaft for future gas line additions.

Flammable gases are equipped with fire arresters in the pipe wells, enhancing safety.H2、C₂H₂、CH₄Valves for pneumatic control, linked with PLC. Each gas installation is equipped with a floor main control valve.

Select different pipe 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 indoor pipe valves for instruments 

Each lab must have individual valve control.

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 fitted with stainless steel valves and equipped with pressure and flow regulators.

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

• Rooms with combustible gases are equipped with combustible gas detectors interconnected with PLCs.

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