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Technical design and characteristics of vacuum insulation pipe

1. The shrinkage rate of the inner tube is 0.3% under the temperature of liquid nitrogen. For the rigid tube, necessary compensator shall be set;

2. Install high vacuum multi-layer insulation low-temperature stop valve, check valve, emergency shut-off valve and safety relief system on the pipeline;

3. The support plug vacuum connection joint has small heat leakage, no frost and no frost

4. The inner and outer tubes are made of austenitic stainless steel 06cr19ni10 (or customized according to customer requirements)

5. Advanced special multi-layer thermal insulation materials and gas adsorbents are used in the interlayer

6. Support with low thermal conductivity

7. Application fields: industrial gas, medicine, biology, electronics, aviation, automobile, beverage and other industries

8. Transmission medium: liquid nitrogen (Lin), liquid argon (LAR), liquid oxygen (LOX), liquefied natural gas (LNG)

Installation characteristics of vacuum insulation pipe

1. The vacuum plug-in connection is called the vacuum plug-in connection, and the connection between flanges is called the vacuum plug-in connection

2. Welded connection, commonly known as welded connection, is used to weld the joints of low-temperature thermal insulation pipes made in sections, and on-site thermal insulation is adopted

3. Professionals guide the installation

4. Shorten the installation time, save the installation workload and reduce the installation cost

Specification and main technical parameters of vacuum insulation pipeline

Specification (mm) DN15 DN20 DN25 DN32 DN40 DN50 DN65 DN80 DN100 DN125 DN150 DN200 DN225

Inner pipe (mm) Φ twenty Φ twenty-five Φ thirty-two Φ thirty-eight Φ forty-five Φ fifty-seven Φ seventy-six Φ eighty-nine Φ one hundred and eight Φ one hundred and thirty-three Φ one hundred and fifty-nine Φ two hundred and nineteen Φ two hundred and forty-five

Outer pipe (mm) Φ seventy-six Φ seventy-six Φ eighty-nine Φ one hundred and eight Φ one hundred and eight Φ one hundred and fourteen Φ one hundred and thirty-three Φ one hundred and fifty-nine Φ one hundred and sixty-eight Φ two hundred and nineteen Φ two hundred and nineteen Φ two hundred and seventy-three Φ three hundred and twenty-five

Heat leakage (w / M) zero point four nine zero point five three zero point six three zero point seven six zero point nine zero one point zero one one point three zero one point five nine one point nine three two point four zero two point eight seven three point eight two four point two nine

working pressure ≤ 4MPa (designed according to the actual requirements of users)

Design temperature - 196℃

Conveying medium LNG, LOX, Lin, LAR, lhe, etc

Leakage rate of vacuum interlayer PA · m3 / S ≤1X10-10

Leakage and bleeding rate of vacuum interlayer PA · m3 / S ≤1X10-8

Sealing vacuum pa ≤5X10-2

Vacuum degree under liquid nitrogen temperature pa ≤5X10-3

ambient temperature - 40℃~60℃

Opening pressure of interlayer safety device 0.02MPa