Service Scope:

1. Comprehensive pipeline engineering for laboratory centralized gas supply systems, including the entire process from design, selection, product supply, maintenance, and technical support to installation and debugging.

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 systems, installation and debugging of gas concentration monitoring and control systems.

4. Supply and installation of laboratory pure water pipeline 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 for stainless steel pipes of different 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 volume.

Bottles are arranged in a cluster 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 safe gas usage.

• Different gases are processed with various materials to ensure purity.

• Varying connection methods (VCR, compression, welding) according to gas type.

The high-pressure section utilizes a high-pressure valve 1 to ensure safe gas usage.

Monitoring System Design Description

• Gas concentration leak detectors and emergency shutdowns are installed in the cylinder room. In the event of harmful gas leaks, the concentration detection alarm will activate both sound and light alarms and send a signal to the exhaust valve, thereby activating the fan to exchange air, ensuring the safety of gas supply.

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

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

• PLC internal signal input terminals are pre-reserved, ensuring scalability and the ability to display concentration/pressure values in real-time.

• The box is equipped with a touch screen that displays the same image as the host computer. The operating system is Windows XP, which facilitates operation.

Design based on technical specifications: 

GB50235-2010 Code for Construction of Industrial Metal Pipeline Works

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 Laboratories"

GB50031-1991《C₂H₂Website Design Standards

GB50177-2005《H2"Station Design Specifications"

GB 50030-2007 "Design Code for Oxygen Stations"

GB50029-2014 "Design Code for Compressed Air Stations"

SH3063-1999 "Design Code for Detection and Alarm Systems of Flammable and Toxic Gases in Petrochemical Enterprises" - Research Laboratory's Existing Conditions Requirements and Other Relevant Standards and Norms.

Functional Column/Pipe Chute Description 

• All pipeline connections are made using digital welding technology for safety assurance. Unused gases in this layer are equipped with reserved outlets in the pipeline well, convenient for future gas line additions.

Flammable gases are equipped with fire arresters in the pipeline shafts, enhancing safety levels.H2、C₂H₂、CH₄Valves with pneumatic control designed and PLC interfaced. Each gas installation features a floor master control valve.

Select different pipe sizes based on varying gas consumption.

• The spacing between 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 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 a combustible gas alarm 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.