Simple clamp sealing operation

⒈ Leaking equipment and location

   ⑴ Leaking equipment：Aniline synthesis converter

   ⑵ Leaking location：cover flange facing leak

2, The relevant specification of the leaking location

    ⑴ Outer diameter of the flange：Upper and lower flange are both φ2920；

   ⑵ Flange connection gap：Maximum gap is 10mm，minimum gap is 8mm；

   ⑶ The distance from flange outer edge to bolt: Maximum distance is 15 mm；

   ⑷ Flange thickness: Upper flange is 160 mm；lower flange is 130 mm；

   ⑸ Connecting bolt quantity and specification：M30,84 stud bolts ；

   ⑹ Mismatching of the upper and lower flange:     part is properly match;  

the maximum mismatching is 1.5mm.

3,  Leaking medium

4, Sealing method

      ⑴  Apply simple clamp

      ① Clamp structure：heat and bend the plate and weld it to make a simple clamp

      ② Strength calculation

In the formula：

S  — clamp thickness，mm；

D  — clamp inner diameter:

      equal to flange outer diameter 2920 mm；

Pc — designed pressure：Pc = 0.2 + 0.4 = 0.6 MPa；

[σ]t — the allowable stress of the clamp material：

         working temperature [σ]t = 105 MPa；

φ — welding efficient：φ=1.

③ Clamp manufacture

 a, Heat and bend the plate of 50mm width，8mm thick；

 b, Reinforcement measures：

ⅰ weld φ8 reinforcing steel bar to in the middle of the plate in circumferential direction；

ⅱ weld M12 nuts at injection ports for strengthening；

ⅲ make the simple clamp into 6 sections, for the better power distribution；

ⅵ Ear thickness 20mm.

 c, Clamp sketch

⑵. Sealant selection and amount estimation

 ① Sealant selection

The material expansion of the sealing structure would changes with the temperature. Apply sealant TXY-8# to facilitate the complementary injection. 

 ② Amount estimation

    Approximately need 34kg of sealant.

5,  Sealing effect observation

  ⑴ Sealing effect

    experiment with air tightness test after injection.