INTERNAL PIPE SLEEVES / INTERNAL SLEEVE / INSERT SLEEVE / PIPE SLEEVE

In the various industrial sectors, the products are stored, transported, or distributed through pipelines and the typical length of the industrial pipes are approximate ranges from 40-45 feet. In order to span any substantial distance, these individual pipes have to be connected from end to end. And the most common method of connecting the two individual pipes is by welding their ends together. The welding can cause several problems in the protection of the pipes. Firstly, the heat generated during the welding destroys the polymer coating of the pipe’s joints. This exposes the pipe material to corrosion and the erosive fluids passing through the pipe. Additionally, the weld itself may get affected by the gases or the fluids passes through the pipes. Therefore, it is essential to isolate the girth weld section of pipelines from the corrosive fluid., and the best way of protecting the pipe girth weld section. Click here for Half Pipe Sleeve.

An Internal Pipe Sleeves is an innovative technology that is now being increasingly used for preventing corrosion at internal field welds. The internal pipe sleeves is designed to protect the girth weld area from corrosion & also to provide a 100% internally coated pipeline. They are used for internal fittings welded pipes and internally coated accessories. Which provides a protective barrier covering during the application of welding, ensuring the durability of the pipe’s polymer coating and avoiding the generation of spots of corrosion at the joints. Our Internal Pipe Sleeves comes in a range from 2″ NB to 72″ NB, can be internally and externally coated with all types of liquid and powder coating used in the industry. Our product is an alternative to expensive field joints coating robots, hence making it an economical and flexible method of field construction.

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• • Lightweight and easy to install
  • The attachment system acts as an internal line-up clamp while automatically setting weld gap
  • Weld time is similar to welding non-coated pipe

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Reli Sleeve™ can be manufactured for OD & N.B. sizes starting from 2” to 72”.

• Girth Weld Protection – Isolate the burn-back 1-2 of the coating from the welding seam and protect the steel substrate.
• Environment Accommodation – Chemistry matched with pipe for corrosive environment.
• Enhance Flow – Smooth surface and tapered ends help to increase flow and reduce turbulence.
• Permanently Anchor – The fitting is permanently anchored to the pipe when the fitting’s recessed metal backing ring is blended with the two pipe ends during the welding process with Tabs or Pins.
• The coating can be coated with any industrial liquid and powder.

Internal Pipe Sleeves are used for various industries & applications. A few of them are mentioned below.

• Applicable to onshore, offshore, plant, and municipal pipelines.
• Protects the I.D. coating from damaging weld spatter during installation.
• Accommodates all pipe sizes and grades in API 5L, ASME, ASTM material like carbon steel and stainless steel.
• Installs with normal welding process, no special qualified welder required.
• Isolates the girth weld area, providing a 100% I.D. coated pipeline.
• After Installation, it becomes a part of the finished pipeline providing permanent corrosion protection same as carrier pipe.
• Refinery Pipeline
• Desalination Plant Pipeline
• Jet Fuels Pipeline
• Fuel Injection Pipeline
• Fire-Water Safety Pipeline
• Refineries Pipeline
• Petrochemical Plant Pipeline
• Offshore Pipeline
• Onshore Pipeline
• Spool and Fittings

• API: American Petroleum Institute
• API 5L – Specification for Line Pipe
• API 1104/ANSI 1331.3 – The procedure and quality of radiography examination limits of acceptability, repair and removal of defects etc.
• ASTM: American Society for Testing Materials Iron and Steel
• ASME Section IX
• SSPC: Steel Structures Painting Council
• SSPC-V1S1 – Visual standard for Abrasive blast cleaned steel
• NACE MR0175 / ISO 15156 – Materials for use in H2S containing Environment in oil and gas production
• NACE SP 0188 – Discontinuity (Holiday) Testing of Protective Coatings
• NACE No. 1 / SSPC-SP5 – White Metal Blasting
• NACE TM 0186 – Holiday Detection of Internal Tubular Coatings of 10-30 Mils Dry Film Thickness
• NACE TM 0384 – Holiday Detection of Internal Tubular Coatings of Less Than 10 Mils Dry Film Thickness
• NACE: National Association of Corrosion Engineers.

Pipe / Plate

• API 5L PSL 1 & PSL 2 (Gr B to X80)
• ASTM A53 / ASTM A106 / ASTM A333
• ASTM A36 / ASTM A516 Gr 60, Gr 65, Gr 70
• ASTM A671 / ASTM A672 / ASTM A691
• ASTM A312 / ASTM A358

Internal Pipe Sleeves are coated 100% internally & externally with liquid or powder coatings. Internal Pipe Sleeves can be coated depending upon the material flowing through the pipeline. Some of the most common coatings used for pipeline coatings are:-

• Check pipe’s ends condition to ensure no damage. Clean dust, water, any contamination that may affect installation. Heat the pipe ends to a temperature of 60-80℃ to remove moisture or water if detected any. Measure the inside diameter of the pipe at least horizontally and vertically and check if it is within the allowance.
• The coating on the pipe insert sleeve should not be damaged, contaminated, or have any other negative defects. Make sure that the sealing rings, heat-resistance tape, and other accessories are in good condition.
• Mix epoxy mastic according to mixing ratio and strictly comply with epoxy pot life after mixing as per recommendation from the manufacturer.
• Apply epoxy mastic evenly onto the cleaned pipe internal cutback area with the amount recommended for each pipe size. The applied epoxy mastic shall form a good beam between the sleeve end and the pipe internal surface post the installation of the sleeve.
• Insert the sleeve into one pipe end till the pins reach the pipe bevel end. The inserting process shall be horizontally evenly pressing by hand. Insert the next prepared pipe end with epoxy to the correct sleeve until the pins reach the pipe bevel end.
• Comply with standard API 1104 or SAE31.1 chapter 9 for the welding procedures. Use the lowest applicable heat setting of the welding machine. The welded area must be well ventilated and properly protected from any inclement weather. Pipe coatings and epoxy may produce harmful fumes during the welding process. Product MSDS must be referred during the welding process.
• If preheating is required, the heating can be done from the pipe external after applying epoxy mastic however should not exceed 120℃. Ground lead shall be attached mechanically to either of the pipe’s end, but never on sleeve tabs. It should never be welded or attached to the center of the pipe. A pipe external clamp may be used for alignment and ends securing to weld tabs purposes.
• All welding activities must be downhill at 7 to 10 inches (175 to 250mm) per minute. A weep hole of 0.5” to 1”(12.7 to 25.4mm) shall be left to allow expanding gases to escape. When crossing the welding tab, a weaving motion of the electrode must be made to ensure complete melting.
• Do not start intermediate passes until the weld has cooled down to 120℃ or lower. The weep hole can be closed at the beginning of the first filler pass. Apply for as many passes as necessary to complete the weld and always keep downhill welding. Slags and other welding products shall be removed between passes.