Vacuum insulated casing-VIC

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Vacuum insulated casing—-VIC

Product Description

Vacuum insulated casing uses water-based fiber cloth material with a three grade vacuum pump equipment,automatic welding machine and MT. These guarantees a high degree of vacuum level that meets the insulation grades D and E.These vacuum insulated  casing use an effective getter to ensure the tubing insulation grade do not decrease after a long time of outdoor storage.  vacuum insulated tubing & casing are reusable. They retain desired insulation properties after being used several times. we are dedicated to the development of new products.

The pre-stressed insulated tubing is mainly consist of inner tube, outer tube, heat insulation material, coupling, etc. In its structure, put pre-stress on the inner tube to make up the different thermal elongation of the inner and outer tube. At normal temperature, the inner tube is in tension condition. When the temperature increases gradually, the tensile stress decreases. When the temperature increases constantly, the tension condition of the inner tube turns to its bearing condition. The pre-elongation of the inner tube decreases the  compression stress after the heated elongation. As a result, the insulated tubing run and maintain in good condition.

API 5CT tubing pipe vacuum insulated VIT for heavy oil production

API 5CT tubing pipe vacuum insulated VIT for heavy oil production

Key Feature

1.Insulated grade D and E.Advanced3-levelvacuum pump, automatic welding machine and online radiographic.

2.Long lifetime.Duringoutdoor storage, insulation level don’t reduce.

3.Inner tube and outer tube connections are both available.

Specifications

A. VIT Performance Level

Heat-insulating property levelHeat conductivity coefficient
A0.06≤λ<0.08
B0.04≤λ<0.06
C0.02≤λ<0.04
D0.006≤λ<0.02
E0.002≤λ<0.006

B. VIT Specification

Specification

Basic parameter

Outer tube OD x Inner Tube ID(in x in)

Steel grade

Connection

Thread

3 1/2 x 2 3/8

N80

L80

P110

 

 

Inner connection

Outer connection

Extreme line connection

 

3 1/2 USS

4 1/2 x 2 7/8

4 1/2 BC

4 1/2 x 3 1/2

4 1/2 BC

5 x 3 1/2

5BC

5 1/2 x 4 1/2

5 1/2 BC

7 x 5 1/2

7 BC

C. Main Performance Parameters

Heat conductivity coefficient (Inner tube inside wall 350℃)  ,W/(m·℃)Normal temperature tensile load, kNNormal temperature tensile load, kNNormal temperature tensile load, kNFlatness %
Normal Temp.Gas injectionNormal Temp.Gas injection
YG88X400.002~0.02≥40232203028≤0.2
YG88X500.002~0.02≥43232203028≤0.2
YG114X620.002~0.02≥50632202624≤0.2
YG114X760.002~0.02≥53732202624≤0.2
YG127X620.002~0.02≥61532202321≤0.2
YG127X760.002~0.02≥61532202321≤0.2

Production Process

 API 5CT tubing pipe vacuum insulated VIT for heavy oil productionAPI 5CT tubing pipe vacuum insulated VIT for heavy oil production

Inspection
A.  X-ray flaw detection
API 5CT tubing pipe vacuum insulated VIT for heavy oil production

 

 

 

 

 

 

 

X-ray flaw detection equipment carry out the testing on the welding seam to guarantee the welding effect and insulating capability.

 

B.  Heat conductivity coefficient test

API 5CT tubing pipe vacuum insulated VIT for heavy oil production

 

 

 

 

 

 

 

 

 

Heat conductivity coefficient 100% test, record the performance parameter and the index curve for each piece of insulated tube.

Quality Control

API 5CT tubing pipe vacuum insulated VIT for heavy oil production

Facilities

API 5CT tubing pipe vacuum insulated VIT for heavy oil production

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