11
Rupture Disc Design:
A rupture disc is a thin wafer of metal placed in a specially designed port for the purpose of
protecting the device and anyone near it from danger due to over pressure of the device. If the
device is over pressured this device
SHOULD
burst.
This overpressure may be a result of many factors, a couple of the most common causes are
overfilling of the vessel, or a rise in temperature of a vessel that is full of liquids with no gas
expansion area. Rupture disc typically used on our DOT sample vessels are rated at a
pressure, but has a typical tolerance of +/- 10% @ 72
o
F. All fluctuations of pressure and/or
temperature begin the weakening process of the rupture disc. that leads to required
maintenance.
·
Safety Precautions Before Installation
1. The special standard flat seat rupture disc is a precision instrument and must be handled
with extreme care. Rupture discs should be installed only by qualified personnel familiar with
rupture discs and proper piping practices.
2. Do not install rupture disc if there is any damage in the dome area. A damaged rupture disc
is any rupture disc with visible nicks or dents.
3. Do not install a rupture disc that has been previously installed and removed from the disc
holder, as reinstalling may adversely affect the joint sealing capabilities and/or performance
of the rupture disc
·
Replacement Procedure
1. Assure that the vessel has no pressure left in it.
2. Remove the rupture disc. retaining nut.
3. Remove the old Rupture Disc, and discard it.
4. Remove the old Kel-F/TFE washer, and discard it.
5. Inspect the retaining nut surface where it contacts the rupture disc, for any nicks, or
deformities. Replace it if any are found.
6. Inspect the seat area in the disc pocket for any nicks, or deformities. Replace it if any are
found.
7. Install the new TFE washer in the disc pocket.
8. Lubricate the face of the retaining nut that contacts the rupture disc, with a thin coat of light
weight grease.
9. Install the new rupture disc wafer in the pocket on top of the TFE washer with the dome side
of the disc facing up.
10. Install the retaining nut & tighten finger tight.
11. Final tightening of the retaining nut should be done with a
Torque Wrench ONLY.
Torque to PRECISELY 15 Ft. Lbs.
9. Cylinder Maintenance:
EASTERN ENERGY SERVICES PTE LTD.
60 Kaki Bukit Place #02-19 Eunos Tech Park Singapore, SG 415979 Singapore
Telephone: +65-6748 6911 Fax: +65-6748 6912
Email: [email protected] Website:
www.eesgroup.com
