当前位置: Home / Faq / Large air separation FAQ /

Installation requirements for cold box of air separation unit

Installation requirements for cold box of air separation unit
Dec 23, 2020
Author: DEAR AST
Question Reply

1.The cold box foundation is divided into frame type and non frame type. The levelness of top surface of frame type frame shall not exceed 1 / 1000. All sections of the frame shall be placed vertically. All bottom plates of non frame type cold box shall be kept at the same level, and the levelness shall not exceed 1 / 1000.

 

2.When installing the cold box plate, the adjacent two sides can beassembled into a whole piece or angle type on the ground. The length error of each diagonal line and the perpendicularity error of four sides shall be in accordance with table 2.

 

Table 2                                                                      mm

Size

Tolerance zone

Larger than

to

1000

2000

±3

2000

4000

±4

4000

8000

±5

8000

12000

±6

12000

16000

±7

16000

20000

±8

20000

 

±9

 

3.The upper end face level of box plate can be adjusted by thin steel plate gasket between foundation frame and framework steel. The width of the steel plate to be padded shall be the same as that of the corresponding section steel.

 

4.The installation nuts and bolts between the frames should be spot welded firmly. The inner side of the section steel between the frames is intermittent welding with a spacing of 150 mm and a weld length of 50 mm. Its outer side is continuous seal welding (see Figure2). The continuous welding outside the whole cold box must meet the requirements of the air tightness of the cold box.

20201222

5.The vertical deviation of the cold box installation is less than or equal to 1.5/1000, but the vertical deviation of the total height of the cold box shall not be greater than 20 mm, or according to the drawing requirements.

DEAR Air Separation Solve YourInstallation requirements for cold box of air separation unitYou can also learn about otherLarge air separation FAQ about DEAR Air Separation, and solve the problem for you.
Didn’t find the problem encountered?
Please contact live chat or email for quick help.
Related FAQ
More Related FAQ
 The purpose of the blowing is to clean out the residual slag, aluminium chips and other debris from the piping and vessels. the air source for blowing is provided by the turbine compressor, and the air cooling tower must be activated. 3. blowing principle, first outside the tower, after the tower, blowing brush to be one after another, in the blowing with the air pressure: low pressure system. Should be maintained at 40 a 50kpa high pressure system: should be maintained at 250 ~ 400k...
2025.07.23
Due to improper adjustment of seal gas pressure during operation, liquid oxygen pump can not pump liquid or leak.   From the quality point of view, when the sealing pressure is too high, there will be gas leakage into the pump through the labyrinth seal, resulting in the impeller with gas or even idling, resulting in liquid injection or pressure drop; when the air pressure before sealing is too low, there will be liquid oxygen leakage.   From the quantity point of view, when (p1-p3...
2025.07.22
Need more information?
Contact us for more details about our air separation equipment, solutions and services.
Products
  • Large air separation
  • Small air separation
  • High purity nitrogen air separation
  • Liquefaction air separation
  • Complete air separation
  • Biogas purification
  • Air separation parts
Need more information?
Tel:+86-19837850537
© Kaifeng DEAR Air Separation Industry Co., Ltd.. All rights reserved.
Online
Inquiry
Email
Top