冷箱珍珠岩保温处仪表连接要求.doc

Zhong_JD

STANDARD SPC.01
GREAD - A
INSTRUMENTATION CONNECTIONS IN COLDBOXES INSULATED WITH PERLITE

PAGE DE GARDE / FRONT PAGE
Rev.
Date
Supervis.
Appr.
Modifications
0
05.09.94
WEWER

Emission Originale/Original Issue
Supersedes RG.321.80

a
02.11.94
WEWER

Pages 2,4 to 9 updated
b
21.03.97
WEWER

Reaffirmed in Microsoftä WORDä
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CONTENTS
1 GENERAL : EQUIPMENT
2 DESIGN OF THE CONNECTIONS
3 EXECUTION OF THE CONNECTIONS
1 GENERAL : EQUIPMENT
- Manual Analyses or Sensors
- Simple or differential Pressures
- Level Gauges on Columns
- Gas and Liquid Flowmetering
- Gas and Liquid Analyses
- Temperature Probes
For standard installation and mounting design refer to GR.350-11 and GR.350-61.
2 DESIGN OF THE CONNECTIONS
The design is carried out by the piping contractor.
2.1 Study of the Routing
- The study must be started upon completion of the piping lay-out. It allows :
- defining the orientation of the nozzles on the column sections and the casing penetration areas,
- -selecting the general option for the routing of the tubes and cables,
- -grouping the instrumentation nozzles
- -in the special case of tubing for liquid analysis with capillary tube, provide a distance of < or = 1000 between the nozzle and the casing wall, if possible (see GR.350.61 mounting 11A).
2.2 Collective Routing Principle
- The tubes and cables are preferably placed on the inside of the casing wall forming a strand which is held by a stainless steel clip, and come out at the lowest point possible (see chapter 2.3). The routing is traced on a main piping drawing, taking into consideration the following points :
- the areas of grouped nozzles,
- inspection doors in the casing and ladders on the inside,
- casing penetrations.
2.3 Routing for connections and casing penetrations.

3 EXECUTION OF THE CONNECTIONS
3.1 Routing
The routing of the tubes and cables consists of :
- an individual routing between the nozzle and the casing,
- a possible individual routing up to the collective routing,
- a collective routing en botte.
3.2 Supports of collective routing
Tubes will be installed in cable way or UPN100 steel structure 200 mm length, situated at the level of the cold box horizontal beams.
Quantity will be choosen in accordance with the number of connections.
Positionning of the tubes inside these supports will be by means of:
- SS collar 10 mm wide, in case of cable ways,
- cabon steel flaf welded on the steel structure UPN in the other cases.
3.3 Supports and Individual Protection
The tubes and cables leading to the casing may be provided with:
- a support depending on the distance general case (see appendix 2),
special case of liquid analysis with capillary tube (see appendix 3)
- protection with an angle iron for great distances, special case of liquid analysis with capillary tube (see appendix 4)
- protection with the piping when a probe is concerned (see appendix 5). This cable is preferably fastened to the piping carrying the probe or to a nearby pipe, but care must be taken to provide flexibility. When one part of the cable can not be protected by the piping, provide partial protection with angle iron
3.4 Material for the Connections
Unless otherwise specified on the contract, the supply is distributed as follows :
- Air Spc : tubes and cabled probes
- Piping contractor : supporting and protecting material, cable support systems, identification discs
(see AL-standard GR.301.01).
The material of the different types of tubes and cables is defined according to the erection drawings set up for the relevant jobs.
4 ANNEXES
4.1 Annex 1 : Routing without support
for span 400 ≤ L ≤ 1500 (General case).
AB : As direct as possible towards the casing.
BC : Minimum span (shrinkage in the horizontal plane).
AB + BC : See fonction chart of the elevation (shrinkage in the vertical plane)
Use the first case for great lengths.Use the second case for small lengths.

EL : Elévation to column installation plane
Evolute length AB + BC in the horizontal plane
0 à 10 m
700 mini
10 à 20 m
1000 mini
20 à 30 m
1200 mini
30 à 40 m
1400 mini
40 à 50 m
1500 mini
50 à 60 m
1700 mini
4.2 Annex 2 : Routing with support
for span 1500< L ≤ 2200 (general case)
AB : As direct as possible to the casing provide an intermediate support (see note)
BC : Min. span (shrinke in the horizontal plane).

NOTE :The support may be provided on near process pipe.
4.3 Annex 3 : Routing for liquide analysis at capillary tube with support
for span 1000 < L < 1500
AB : As direct as possible towards the casing provide an intermediate support.
BC : Min. span (shrinkage in the horizontal plane.

4.4 Annex 4 : Routing for liquide analysis at capillary tube with protection
for span L > 1500

4.5 Annex 5 : Cable routing for probe on column or piping.
a) Probe on lover generatrice.

b) Particular case when probe cannot be installed on lover generatrice.

Departm.
ENG.001
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