A patch for repairing pipes of FZVH type (hereinafter referred to as a patch) is used to repair locally damaged steel pipelines (e.g. damaged by corrosion or mechanical impact) with no leakage of medium or with leakage of medium, with the highest value of operating pressure up to 40 bar. There is a relief valve mounted to the outer side of the patch; the valve is used to release pressure of the sealing when the patch is applied. To handle the stopper and safe diversion of the leaking medium outside the installation area, the installation kit FZ-V (following 5.2-4.1 hereof) must be used. The upper edge of the neck and the stopper of the relief valve have been adjusted for a safety sealing weld to be made after the repair is completed.
Table of standard dimensions is indicated in the following page.
Other dimensions should be consulted
Permissible overpressure of medium in the damaged piping when the patch is being applied:
in accordance with the working procedure approved by the operator
Permissible leakage of medium out of the damaged piping when the patch is being applied:
max. 150 m3/ hour
For other technical parameters following 5.2
TABLE OF STANDARD DIMENSIONS
| Name - dimension | D [mm] |
L [mm] |
Patch width | Patch wall | Inner side | Catalogue No. | |||
| A [mm] |
O | S [mm] |
bevel 45° /X [mm] |
K [mm] |
Y [mm] |
||||
| Patch FZVH DN50 x 150 | 60,3 | 150 | 100 | 1/2 | 5,0 | 1,6 | 15 | 5 | 520-2215-060 |
| Patch FZVH DN65 x 150 | 76,1 | 150 | 130 | 1/2 | 520-2215-076 | ||||
| Patch FZVH DN80 x 150 | 88,9 | 150 | 100 | 1/3 | 6,3 | 1,6 | 520-2215-088 | ||
| Patch FZVH DN80 x 300 | 300 | 150 | 1/2 | 520-2230-088 | |||||
| Patch FZVH DN80 x 500 | 500 | 150 | 520-2250-088 | ||||||
| Patch FZVH DN100 x 150 | 108 | 150 | 115 | 1/3 | 7,1 | 1,7 | 20 | 10 | 520-2215-108 |
| Patch FZVH DN100 x 300 | 300 | 180 | 1/2 | 520-2230-108 | |||||
| Patch FZVH DN100 x 500 | 500 | 180 | 520-2250-108 | ||||||
| Patch FZVH DN125 x 150 | 133 | 150 | 145 | 1/3 | 6,3 | 1,6 | 520-2215-133 | ||
| Patch FZVH DN125 x 300 | 300 | 145 | 520-2230-133 | ||||||
| Patch FZVH DN125 x 500 | 500 | 145 | 520-2250-133 | ||||||
| Patch FZVH DN150 x 150 | 159 | 150 | 125 | 1/4 | 7,1 | 1,7 | 520-2215-159 | ||
| Patch FZVH DN150 x 300 | 300 | 170 | 1/3 | 520-2230-159 | |||||
| Patch FZVH DN150 x 500 | 500 | 170 | 520-2250-159 | ||||||
| Patch FZVH DN200 x 150 | 219,1 | 170 | 170 | 1/4 | 30 | 520-2215-219 | |||
| Patch FZVH DN200 x 300 | 300 | 230 | 1/3 | 520-2230-219 | |||||
| Patch FZVH DN200 x 500 | 500 | 230 | 520-2250-219 | ||||||
| Patch FZVH DN250 x 150 | 273 | 175 | 175 | 1/5 | 10,0 | 2,5 | 520-2215-273 | ||
| Patch FZVH DN250 x 300 | 300 | 220 | 1/4 | 520-2230-273 | |||||
| Patch FZVH DN250 x 500 | 500 | 295 | 1/3 | 520-2250-273 | |||||
| Patch FZVH DN300 x 150 | 323,9 | 170 | 170 | 1/6 | 40 | 520-2215-323 | |||
| Patch FZVH DN300 x 300 | 300 | 205 | 1/5 | 520-2230-323 | |||||
| Patch FZVH DN300 x 500 | 500 | 350 | 1/3 | 520-2250-323 | |||||
| Patch FZVH DN350 x 200 | 355,6 | 200 | 190 | 1/6 | 520-2215-355 | ||||
| Patch FZVH DN350 x 300 | 300 | 290 | 1/4 | 520-2230-355 | |||||
| Patch FZVH DN350 x 500 | 500 | 380 | 1/3 | 520-2250-355 | |||||
| Patch FZVH DN400 x 200 | 406,4 | 210 | 210 | 1/6 | 520-2220-406 | ||||
| Patch FZVH DN400 x 300 | 300 | 325 | 1/4 | 520-2230-406 | |||||
| Patch FZVH DN400 x 500 | 500 | 435 | 1/3 | 520-2250-406 | |||||
| Patch FZVH DN500 x 200 | 508 | 200 | 200 | 1/8 | 520-2220-508 | ||||
| Patch FZVH DN500 x 300 | 320 | 320 | 1/5 | 520-2230-508 | |||||
| Patch FZVH DN500 x 500 | 500 | 545 | 1/3 | 520-2250-508 | |||||