The encapsulation of downhole components such as Hydraulic Control Lines, Single Line Encapsulation, Dual-Line Encapsulation (FLATPACK), Triple-Line Encapsulation (FLATPACK) has become prevalent in downhole applications. The overlaying of plastic provides several benefits that help to ensure a successful completion.
| 
 Chemical Composition  | 
||||||||||
| 
 Nickel  | 
 Chromium  | 
 Iron  | 
 Molybdenum  | 
 Carbon  | 
 Manganese  | 
 Silicon  | 
 Sulfur  | 
 Aluminum  | 
 Titanium  | 
 Copper  | 
| 
 %  | 
 %  | 
 %  | 
 %  | 
 %  | 
 %  | 
 %  | 
 %  | 
 %  | 
 %  | 
 %  | 
| 
 
  | 
 
  | 
 min.  | 
 
  | 
 max.  | 
 max.  | 
 max.  | 
 max.  | 
 max.  | 
 
  | 
 
  | 
| 
 38.0-46.0  | 
 19.5-23.5  | 
 22.0  | 
 2.5-3.5  | 
 0.05  | 
 1.0  | 
 0.5  | 
 0.03  | 
 0.2  | 
 0.6-1.2  | 
 1.5-3.0  | 
| 
 Norm Equivalence  | 
|||
| 
 Grade  | 
 UNS No  | 
 Euro norm  | 
|
| 
 No  | 
Name | ||
| Alloy | ASTM/ASME | EN10216-5 | EN10216-5 | 
| 825 | N08825 | 2.4858 | NiCr21Mo | 
				
				
| ASTM B704 / ASME SB704, Incoloy 825, UNS N08825 | ||
| ASTM B751 / ASME SB751 | ||
| Size OD | Tolerance OD | Tolerance WT | 
| 1/8’’≤OD<5/8’’ (3.18≤OD<15.88 mm) | ±0.004’’ (±0.10 mm) | ±12.5% | 
| 5/8≤OD≤1’’ (15.88≤OD≤25.4 mm) | ±0.0075’’ (±0.19 mm) | ±12.5% | 
| Meilong Standard | ||
| Size OD | Tolerance OD | Tolerance WT | 
| 1/8’’≤OD<5/8’’ (3.18≤OD<15.88 mm) | ±0.004’’ (±0.10 mm) | ±10% | 
| 5/8≤OD≤1’’ (15.88≤OD≤25.4 mm) | ±0.004’’ (±0.10 mm) | ±8% | 
| ASTM B423 / ASME SB423, Incoloy 825, UNS N08825 | ||
| 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) | +0.005’’ (+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% |