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Pipe Coating

There are three common types of the anti-corrosion steel pipes structure in the picture

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Performance indexes of single-layer anti-corrosion pipe

No

Item

Performance Index

1

Adhesion

2

2

Cathodic Disbonding(65℃,48h). mm

8

3

Cathodic Disbonding(65℃,30d) /mm

15

4

Bending resistance(-20, 2.5°)

No cracks

The coating thickness of the laboratory sprayed specimen should be 300μm~400μm.

 

Performance indexes of double-layer anti-corrosion pipe

No

Item

Performance Index

Testing Method

1

Softening point.

90

GB/T 4507

2

Evaporation loss(160). %

1.0

GB/T 11967

3

Shearing strength(PE/steel). MPa

1.0

GB 7124

4

Peel strength(PE/steel). N/cm

35

GB 2792

(20±5)

 

Performance indexes of triple-layer anti-corrosion pipe

No

Item

Performance Index

Testing Method

1

Density, g/cm

0.92-0.95

GB 4472

2

Flowing rate, g/10min(190=2.16kg)

0.7

GB 3682

3

Vicat softening point,

90

GB 1633

4

Embrittlement temperature,

-50

GB 5470


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