Standard for Stainless Steel Tubing for Compressed Air

Standard for selection and installation of compressed air stainless steel pipe

in the compressed air system, the pipeline is the core carrier of gas transmission, and its material and installation quality directly affect the stability, cleanliness and safety of the system. Granklin water-lubricated screw air compressor outputs oil-free, dry, high-cleanliness compressed air, which puts forward higher requirements for supporting pipelines. The following is the selection and installation standard of compressed air stainless steel pipe:

1. Material Selection Criteria

1. corrosion resistance
   304 or 316L stainless steel is preferred. This kind of stainless steel has high chromium content and dense oxide film on the surface, which can effectively resist the corrosion of moisture and trace acids in compressed air and prolong the service life of the pipeline.

2. Inner wall smoothness
   the inner wall of the pipe shall be polished and the surface roughness shall be less than 0.8 μm. The smooth inner wall can reduce the air flow resistance, avoid the adhesion of impurities, and ensure the cleanliness of compressed air, especially suitable for the demand of oil-free air compressor for low pollution transmission.

Standard for 2. Pipe Connection and Sealing

1. connection mode
   argon arc welding or clamping connection is recommended:
   • welding: It is necessary to ensure that the weld is uniform and free of pores to avoid leakage due to welding defects.
   • clamping type: The pipe fittings and pipes are tightened by special tools, which is convenient to operate and reliable in sealing, suitable for frequent disassembly and assembly or maintenance scenarios.
2. Sealing material
   food grade sealant or ethylene propylene diene monomer rubber (EPDM) sealing ring shall be used at the connection to avoid aging and cracking of common materials under the temperature change of compressed air and ensure no leakage for a long time.

3. withstand voltage and safety standards

1. wall thickness design
   pipe wall thickness should be selected according to the working pressure of the system, usually following the following principles:
   • when the working pressure is ≤ 1.0MPa, the wall thickness shall be ≥ 1.5mm;
   • when the working pressure is> 1.0MPa, the wall thickness should be increased accordingly to ensure that the pressure bearing capacity of the pipeline is 1.5 times higher than the maximum pressure of the system.
2. Bracket Fixing
   the pipeline shall be provided with fixed supports along the direction, with the spacing not exceeding 2 m, so as to avoid deformation of the pipeline and loosening of the interface due to vibration or thermal expansion and contraction.

4. cleanliness control standard

1. pretreatment Requirements
   before installation, the pipeline shall be pickled and passivated to remove residual oil and metal debris, and form a passivation film on the surface to improve corrosion resistance.

2. Cleaning after installation
   after the pipeline connection is completed, it needs to be purged with dry compressed air to ensure that there are no welding slag, dust and other impurities inside. The oil-free air output from the Granklin air compressor can be used for final purging to avoid secondary pollution.

5. Testing and Acceptance Criteria

1. pressure Test
   after the installation is completed, inject clean water or air with 1.5 times the working pressure into the system and keep it for 30 minutes. The pressure drop does not exceed 5% as qualified.

2. Leak Detection
   use soapy water or a professional leak detector to check all connections to ensure that no bubbles are generated and the system is sealed.

Adaptation Advantage of 6. and Granklin Air Compressor

1. oil-free environment adaptation
   the corrosion resistance and sealing performance of the stainless steel pipe can perfectly adapt to the oil-free compressed air output by the Granklin air compressor to avoid the introduction of pollution due to pipeline aging or leakage.

2. Long-term stability guarantee
   smooth inner wall and reliable connection mode can reduce system pressure drop, improve energy efficiency, and reduce maintenance frequency at the same time, forming a synergistic advantage with the low maintenance characteristics of Granklin air compressor.

Summary
the compressed air stainless steel pipe shall meet the standards of corrosion resistance, reliable connection and sealing, pressure safety and high cleanliness. Through scientific material selection and standard installation, the system can ensure stable transmission of granklin air compressor output oil-free, clean compressed air, and provide efficient and safe gas power solutions for industrial production.

(Note: The standard described in this article applies to the general requirements for the selection and installation of compressed air system pipes, and does not involve the comparison of specific brands or models.)