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
⑶ The distance from flange outer edge to bolt: Maximum distance is
⑷ Flange thickness: Upper flange is
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
3, Leaking medium
Medium |
System pressure / MPa |
System temp. / ℃ |
aniline、hydrogen、nitrobenzene、catalyst |
0.2 |
|
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
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
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
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
5, Sealing effect observation
⑴ Sealing effect
experiment with air tightness test after injection.
Influencing elements for the project quality |
Compensation measure | |||
Main problems |
Influences on quality |
Fixture reinforcement measures |
Sealant selection |
Injection method |
Clamp strength allowance |
Influence bearing capacity |
Built-up construction, add nuts, and apply 6 sections. |
Txy-8# has low initial injection pressure, good for filling. |
Control extruding transmission speed |
System temperature change |
Clamp expansion at different temperature affects the sealing result. |
Make complementary injection after the temperature changed |
Txy-8# is no curing sealant good for complementary filling |
Slowly press pressure for complementary injection |
China Contact
Tel: +86-22-23111200 Fax: +86-22-23301140 |
TXY-TECH INC, 9894 Bissonet, Suite 987, Houston, TX 77036
Tel: (510) 220-5689 (510) 502-1227 |