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Tungsten Alloy Tubing Anticorrosive Tubing

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.
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Product description
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.
 
Tungsten Alloy Tubing Anticorrosive 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 testing, the 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 pressure: 95MPa, 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
N80、P110
J55、N80
Thickness of Tungsten Alloy Layer
60-80um
40-60um
≥30um
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