FEP Encapsulated Incoloy 825 Control Line Tube

Short Description:

A small-diameter hydraulic line used to operate downhole completion equipment such as the surface controlled subsurface safety valve (SCSSV). Most systems operated by control line operate on a fail-safe basis. In this mode, the control line remains pressurized at all times. Any leak or failure results in loss of control line pressure, acting to close the safety valve and render the well safe.

Product Detail

Product Tags

Product Introduction

A downhole safety valve that is operated from surface facilities through a control line strapped to the external surface of the production tubing. Two basic types of SCSSV are common: wireline retrievable, whereby the principal safety-valve components can be run and retrieved on slickline, and tubing retrievable, in which the entire safety-valve assembly is installed with the tubing string. The control system operates in a fail-safe mode, with hydraulic control pressure used to hold open a ball or flapper assembly that will close if the control pressure is lost.

Welded Control Lines are the preferred construction for control lines being used in downhole oil and gas applications. Our welded control lines are used in SCSSV, Chemical Injection, Advanced Well Completions, and Gauge Applications. We offer a variety of control lines. (TIG Welded, and floating plug drawn, and lines with enhancements) The various processes provide us the ability to customize a solution to meet your well completion.

Product Display

FEP Encapsulated Incoloy 825 Control Line Tube (1)
FEP Encapsulated Incoloy 825 Control Line Tube (3)

Alloy Feature


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.


Chemical Processing.
Oil and gas well piping.
Nuclear fuel reprocessing.
Components in pickling equipment like heating coils, tanks, baskets and chains.
Acid production.

Dimensional Tolerance

ASTM B704 / ASME SB704, Incoloy 825, UNS N08825, Inconel 625, UNS N06625
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%

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