详情描述

Service Scope:

1. Comprehensive pipeline engineering for laboratory centralized gas supply systems, including the entire system's installation, debugging, from 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. Supply and installation of laboratory pure water piping 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 in various stainless steel pipe grades (EP, BA), 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 centrally located for easy refilling operations.

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

• Equipped with a safety valve for ensured safety of use.

• 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 falls 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 high-pressure valves 1 to ensure gas safety.


Monitor 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 in the cylinder room, the concentration detection alarm will trigger both audio and visual alarms and send signals to the exhaust valve, activating the fan to exchange air, ensuring safe gas supply.

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

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

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

• The box is equipped with a touch screen and a display that can be viewed simultaneously on a host computer. The operating system is Windows XP, making it 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 Field Equipment and Industrial Pipeline Welding Construction"

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

GB50031-1991《C₂H₂Website Design Standards

GB50177-2005《H2"Site Design Specifications"

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

GB 50029-2014 "Code for Design of Compressed Air Stations"

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


Functional Column/Pipe Shaft Description 

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

Flammable gases are equipped with fire arresters in the pipeline wells, enhancing safety coefficients.H2、C₂H₂、CH₄Pneumatic control valves are designed to be linked with PLCs. Each gas line is equipped with a floor main control valve.

Select pipelines of different sizes based on varying gas consumption.

• Gas pipeline supports should be no more than 1.5 meters apart. The support distance is determined based on the smallest internal diameter of the gas pipeline.


Design Specifications for Instrument Room Pipe Valves 

Each laboratory 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 equipped with pressure and flow regulators.

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

Rooms with combustible gases are equipped with combustible 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.