Seamless: pierced, redrawn, annealed (multi-pass circulation process)
Welded: longitudinally welded, redrawn, annealed (multi-pass circulation process)
Packing: Tubing is level wound coiled on the metal / wooden drums or spools.
All drums or spools are packed in wooden crates for easy logistic operation.
Close dimensional tolerances
Considerably enhanced mechanical properties
Superior surface finish
High cleanness of inside surface
Controlled ovality, eccentricity
| Chemical | Flare | Metallurgical |
| Corrosion | Flatten | Positive material identification (PMI) |
| Dimensional | Grain size | Surface roughness |
| Eddy current | Hardness | Tensile |
| Elongation | Hydrostatic | Yield |
|
Nickel |
Chromium |
Iron |
Molybdenum |
Columbium + Tantalum |
Carbon |
Manganese |
Silicon |
Phosphorus |
Sulfur |
Aluminum |
Titanium |
Cobalt |
|
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
|
min. |
|
max. |
|
|
max. |
max. |
max. |
max. |
max. |
max. |
max. |
max. |
|
58.0 |
20.0-23.0 |
5.0 |
8.0-10.0 |
3.15-4.15 |
0.10 |
0.50 |
0.5 |
0.015 |
0.015 |
0.4 |
0.40 |
1.0 |
|
Norm Equivalence |
|||
|
Grade |
UNS No |
Euro norm |
|
|
No |
Name |
||
|
Alloy |
ASTM/ASME |
EN10216-5 |
EN10216-5 |
|
625 |
N06625 |
2.4856 |
NiCr22Mo9Nb |
| ASTM B444 / ASME SB444, Inconel 625, UNS N06625 | ||
| Size OD | Tolerance OD | Tolerance WT |
| 1/8’’ ≤OD<3/16’’ (3.18≤OD<4.76 mm) | +0.003’’ (+0.08 mm) / -0 | ±10% |
| 3/16≤OD<1/2’’ (4.76≤OD<12.7 mm) | +0.004’’ (+0.10 mm) / -0 | ±10% |
| 3/16≤OD<1/2’’ (4.76≤OD<12.7 mm) | +0.005’’ (+0.13 mm) / -0 | ±10% |
| Meilong Standard | ||
| Size OD | Tolerance OD | Tolerance WT |
| 1/8’’ ≤OD<3/16’’ (3.18≤OD<4.76 mm) | +0.003’’ (+0.08 mm) / -0 | ±10% |
| 3/16≤OD<1/2’’ (4.76≤OD<12.7 mm) | +0.004’’ (+0.10 mm) / -0 | ±10% |
| 1/2’’≤OD≤1’’ (12.7≤OD≤25.4 mm) | +0.004’’ (+0.10 mm) / -0 | ±8% |