Coiled tubing (CT) refers to a continuous and long length of small diameter metal pipe, generally, this type tubing unit consists of other components, the unit size can be small or large depending on application, a reel may be used for storage and transportation.
We specialize in stainless steel coiled shape tubing for years, having facility to producing superior coil tubing, with a varieties of sizes and dimensions.
Coiled Tubing Types
Welded coiled tubes and seamless coiled tubes are both offered as standards, common specification is ASTM A269, cold drawing manufacturing process improve tubing performance, annealing pickling and bright annealing finishes are for specific uses.
After straight tubing finished, tubing is coiled, and slightly formed circle shape into a reel, maximum length up to 1000 meters.
Stainless Steel Grades
Stainless steel is a large group with good corrosion resistance, meanwhile, the material have perfect toughness and formability under annealed condition, which properties made tubing easy to fabricate and bending.
300 series stainless steels are widely used, because these grades provide balanced characteristics for application, typical grade are TP304, TP316L stainless steel.
Duplex steel is also for coil tubing, particular in corrosion environment, common grade is 2205 duplex.
Stainless steel coiled tubing dimensions range from 3.0 mm to 45 mm in outside diameter, and 0.3 mm to 2.0 mm in wall thickness, maximum length reaches to 1000 meters, welded capillary coiled tubing provide thinner wall for specific purpose.
Then tubing is straight condition, eddy current test is conducted via in line device, to detect leak and defect situation, small size weight in coiling can be carried out air under water testing.
Coiled tubing usually is long length tube coil, compared to straight tubing, it not require connect tubing end with fitting, therefore, it save time for installation, and it is cost effective way, less maintenance.