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  • Product Name: Tungsten Alloy Tubing Anticorrosive Tubing
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1. Structure: There is a deposition of tungsten alloy layer on the inner and outer walls of general API standard pipes

 or special premium thread tubing.

 2. Performance Indicators

Mechanical Property: The pipe meets API Standards

Anticorrosion Property: Resistance to H2S/CO2 corrosion in high temperature, salt water corrosion, alkali corrosion and weak acid 

corrosion,

 meeting the corrosion resistance requirements of NACE 0177 Standards.

Threaded Connection: The threads are of good resistance to thread gluing.

Tungsten Alloy Layer and Backing Material Binding Force: According to GB/T5270-2005 testingthe tungsten alloy layer does

 not crack 

or peel off.

Appearance: Uniformly bright, showing silvery white

Thickness of Tungsten Alloy Layer: 40-60μm

Hardness of Tungsten Alloy Layer: 560-640HV

Special Premium Thread Tubing: Hydrostatic pressure95MPa, load maintaining for 30 minutes, without leakage.

Gas seal: 70MPa, load maintaining for 15 minutes, without leakage.

Test Item

Inspection Item

Test Content

Threaded connection performance

Makeup/breakout test

4 makeup and 3 breakout, the optimal torque

Hydrostatic pressure test

95MPa pressure maintaining for 95MPa 30 minutes

Air tightness test

ISO 13679 simplified B series test

Calculate the load point according to the load envelope determined 

based on the wellhead load

Conclusion

The threaded connection performance fully meet the requirements of the test items

 3. Product Classifications and Standards

Standards of Tungsten Alloy Anticorrosive Tubing

 

Indicators

Anticorrosion Grade

Class A Tungsten Alloy Tubing

Class B Tungsten 

Alloy Tubing

Class C Tungsten

 Alloy Tubing

CO2 Partial Pressure of CO2 (Mpa)

≤11Mpa

≤5Mpa

≤2Mpa

Partial Pressure of H2S (Mpa)

5Mpa

4Mpa

2Mpa

Temperature (0C) 

≤1600C

≤1200C

≤900C

CL- concentration (g/L)

≤120g/L

80g/L-100g/L

80g/L

Anticorrosion Comparison

Equivalent to nickel-based alloy

Better than super 13Cr or dual-phase steel

Better than 13Cr

Mechanical Property

Consistent with that of backing material

Consistent with that of 

backing material

Consistent with that of 

backing material

Backing Material (Seamless Steel Pipe)

110SS

N80P110

J55N80

Thickness of Tungsten Alloy Layer

60-80um

40-60um

≥30um

 

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Address: 5th Floor, Dongta Building, Hunan Chamber of Commerce MansionNo.569, 3rd Section of Furong Middle Road, Yuhua District, Changsha City, Hunan ,P.R.China.

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