详情描述

Service Scope:

1. Lab centralized gas supply system pipeline engineering, encompassing the entire system installation and commissioning, including 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 & Alarm System, Installation & Commissioning of Gas Concentration Monitoring & Alarm Control Systems.

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

5. Valve Fittings: Automatic regulating and controlling equipment for various gas supply systems, gas regulators, stainless steel pipes of different grades (EP grade, BA grade), valves (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 volume.

Bottles are arranged in a centralized location for easy refilling and other operations.

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

• Equipped with a safety valve for guaranteed safe operation.

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

• Features low-pressure alarm function, alerting users to replace the cylinder when the pressure drops 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 are contained in materials specific to each, ensuring purity.

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

• The high-pressure section utilizes 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 shutdown. In the event of harmful gas leakage in the cylinder room, the concentration detection alarm will trigger both sound and light alarms, simultaneously sending signals to the exhaust valve to activate the fan for air exchange, ensuring the safety of gas supply.

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

• All signal lines use 4-core shielded cables to prevent signal interference.

•PLC internal signal input terminals are all reserved for expandability, allowing real-time display of concentration/pressure values.

• The unit is equipped with a touch screen and a display connected to the host computer. It operates on Windows XP for ease of use.

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 Field Equipment and Industrial Pipeline Welding Engineering

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

GB50031-1991《C₂H₂Website Design Specifications

GB50177-2005《H2"Station Design Specifications"

GB50030-2007 "Code for Design of Oxygen Stations"

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

SH3063-1999 "Design Code for Detection and Alarm of Combustible and Toxic Gases in Petroleum and Chemical Enterprises" - Research Laboratory's Existing 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 use. This layer has预留 openings 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 factors.H2、C₂H₂、CH₄Valves for pneumatic control are designed to interface with PLCs. Each gas line 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 supporting distance is determined based on the smallest inner diameter of the gas pipeline.


Design Instructions for Instrument Room Pipe Valves 

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 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 type.

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

• Gas enters the main pipeline of the room, installation of a gas purification system can improve the purity of the gas.