详情描述

Scope of Service:

1. Lab 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-high purity 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 debugging of gas concentration monitoring and alarm control systems.

4. Lab pure water pipeline system installation, lab wastewater treatment system design and installation.

5. Pipeline valves: Automatic regulating and controlling equipment for various gas supply systems, gas regulators, valves for various grades of stainless steel pipes (EP grade, BA grade) including diaphragm valves, ball valves, needle valves, safety valves, check valves, flame arrestors, 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 volume.

• Cylinders are arranged in clusters for easy refilling procedures.

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

• Equipped with a safety valve for ensured safe 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 of the combustible gas alarm, emergency shutdown, and fan. 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 shutdowns. In the event of harmful gas leakage in the cylinder room, the concentration detection alarm will trigger an audible and visual alarm, 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 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 real-time display of concentration/pressure values.

• The box is equipped with a touch screen and dual display capability with a host computer. The operating system is Windows XP, facilitating easy operation.

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

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

GB50031-1991《C₂H₂"Station Design Specifications"

GB50177-2005《H2Station Design Standards

GB50030-2007 "Oxygen Station Design Code"

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 conditions required and other relevant standards and specifications.


Functional Column/Pipe Shaft Description 

• All connecting pipelines are焊接 with digital welding technology for safety assurance. Unused gases in this layer are equipped with reserved outlets in the pipeline well for future gas line additions.

Flammable gases are equipped with fire dampers in the pipeline wells, enhancing safety factors.H2、C₂H₂、CH₄Valves for pneumatic control systems are designed and interconnected with PLCs. Each gas line is equipped with a floor master control valve.

Select different pipe sizes based on varying gas consumption.

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


Design Specifications for Instrument Room Pipe Valves 

Each lab must have individual valve controls.

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

All gas export points are fitted 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 type.

Rooms containing flammable gases are equipped with a combustible gas alarm linked to a PLC.

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