PVDF Encapsulated Super Duplex 2507 Control Line Tube

Short Description:

Improving technology has extended the range of ways in which oil and gas fields can be exploited, and increasingly projects require the use of long, continuous lengths of stainless steel control lines. These are employed in a variety of applications including hydraulic controls, instrumentation, chemical injection, umbilicals and flowline control. Meilong Tube supplies products for all of these applications, and more, lowering operating costs and improved recovery methods for our customers.

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Product Introduction

Meilong Tube supplies a whole range of products to the oil and gas sector, and it’s one of our most important markets. You’ll find our high performance tubes successfully used in some of the most aggressive subsea and downhole conditions thanks to our proven track record in meeting the strict quality requirements of the oil, gas and geothermal energy industries.

Thanks to advances in tubular control line technologies, it is now cheaper and easier to connect downhole valves and chemical injection systems with remote and satellite wells, for both fixed and floating central platforms. We offer coiled tubing for control lines in stainless steel and nickel alloys.

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Encapsulated Hydraulic Control Line Tube (2)
Encapsulated Hydraulic Control Line Tube (1)

Alloy Feature

Corrosion Resistance

2507 Duplex is highly resistant to uniform corrosion by organic ac Super Duplex 2507 Plateids such as formic and acetic acid. It is also highly resistant to inorganic acids, especially if they contain chlorides. Alloy 2507 is highly resistant to carbide-related intergranular corrosion. Due to the ferritic portion of the duplex structure of the alloy it is very resistant to stress corrosion cracking in warm chloride containing environments. Through additions of chromium, molybdenum and nitrogen localized corrosion such as pitting and crevice attack are improved. Alloy 2507 has excellent localized pitting resistance.


High resistance to chloride stress corrosion cracking
High Strength
Superior resistance to chloride pitting and crevice corrosion
Good general corrosion resistance
Suggested for applications up to 600° F
Low rate of thermal expansion
Combination of properties given by austenitic and ferritic structure
Good weldability and workability

Dimensional Tolerance

ASTM A789 / ASME SA789, Super Duplex 2507, UNS S32750
Size OD Tolerance OD Tolerance WT
<1/2’’ (<12.7 mm) ±0.005’’ (±0.13 mm) ±15%
1/2’’ ≤OD≤1’’ (12.7≤OD≤25.4 mm) ±0.005’’ (±0.13 mm) ±10%
Meilong Standard
Size OD Tolerance OD Tolerance WT
<1/2’’ (<12.7 mm) ±0.004’’ (±0.10 mm) ±10%
1/2’’ ≤OD≤1’’ (12.7≤OD≤25.4 mm) ±0.004’’ (±0.10 mm) ±8%

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