Meilong Tube manufactures corrosion resistant alloy hydraulic control line tubing products for a variety of upstream oil and gas and geothermal applications. Meilong Tube has extensive experience in producing coiled tubing from duplex, nickel alloy and stainless steel grades to industry and customer-specific requirements.
Meilong Tube specially manufactures seamless and redrawn, welded and redrawn coiled tubing which are made from corrosion-resistant austenitic, duplex, super duplex stainless steels and nickel alloy grades. The tubing is used as hydraulic control lines and chemical injection lines specially serving oil and gas, geothermal industry.
Incoloy alloy 825 is a nickel-iron-chromium alloy with additions of molybdenum and copper. This nickel steel alloy’s chemical composition is designed to provide exceptional resistance to many corrosive environments. It is similar to alloy 800 but has improved resistance to aqueous corrosion. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localized attack such as pitting and crevice corrosion. Alloy 825 is especially resistant to sulfuric and phosphoric acids. This nickel steel alloy is used for chemical processing, pollution-control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production, and pickling equipment.
Characteristics
Excellent resistance to reducing and oxidizing acids.
Good resistance to stress-corrosion cracking.
Satisfactory resistance to localized attack like pitting and crevice corrosion.
Very resistant to sulfuric and phosphoric acids.
Good mechanical properties at both room and elevated temperatures up to approximately 1020° F.
Permission for pressure-vessel use at wall temperatures up to 800°F.
Application
Chemical Processing.
Pollution-control.
Oil and gas well piping.
Nuclear fuel reprocessing.
Components in pickling equipment like heating coils, tanks, baskets and chains.
Acid production.
Alloy |
O.D. |
W.T. |
Yield Strength |
Tensile Strength |
Elongation |
Hardness |
Working Pressure |
Burst Pressure |
Collapse Pressure |
inch |
inch |
MPa |
MPa |
% |
HV |
psi |
psi |
psi |
|
|
|
min. |
min. |
min. |
max. |
min. |
min. |
min. |
|
Incoloy 825 |
0.250 |
0.035 |
241 |
586 |
30 |
209 |
7,627 |
29,691 |
9,270 |
Incoloy 825 |
0.250 |
0.049 |
241 |
586 |
30 |
209 |
11,019 |
42,853 |
12,077 |
Incoloy 825 |
0.250 |
0.065 |
241 |
586 |
30 |
209 |
15,017 |
58,440 |
14,790 |