A half repair sleeve, also known as a half pipe sleeve or half sole repair sleeve, is a component used to reinforce and repair pipelines that have damage or anomalies.
It is designed to provide reinforcement for pipelines without the need to shut down the entire line, making it ideal for maintenance repairs.
Download PDFThru-put loss can be avoided by casing the existing lines with the help of half pipe sleeve.
We manufacture half pipe sleeve of all sizes, wall thickness, and grades of steel plates which are to ASTM certifications as well as a longitudinal edge. Half-sole repair sleeves also called as spilt casting or half wrap are manufactured by customizing as per client’s specification.
Depending on the requirements of the customer, half pipe sleeve can be made from 4 available grades of steel. For instance, for leaking & non-leaking defects, pressure-rated steel sleeves are used whereas structural grade steel sleeves are used for reinforcement for a defective area.
The half repair sleeve is customized according to the client's specifications It is a tight-fitting sleeve that is installed over the damaged section of the pipeline to provide structural support and prevent further damage The sleeve is typically made of materials such as carbon steel or stainless steel.
The half repair sleeve is designed with excellent mechanical strengths and superior elongation properties It has longitudinal edges that allow it to be wrapped around the pipeline, providing a secure and durable repair solution.
The half repair sleeve is a versatile component used in pipeline maintenance and repair to reinforce damaged sections and ensure the integrity of the pipeline.
Pressure containing sleeves feature a wall thickness equal to or greater than required for the maximum allowable operating pressure or the full strength of the pipe being repaired. The half repair sleeve material is certified and the carbon equivalent will not exceed 0.45 percent. Each half-sole segment comes with one pre-crimped back-up strip. Half pipe sleeves can be used as pads or cradles for above ground piping, drain tile supports and patches (segments in 90° and 180° arcs, from 6-inches to 10 feet in length are available as specials). Each Half pipe sleeve has standard bevels with a back-up strip and material certifications. Sleeve ends are square cut.
The steel repair sleeves can be used for internal and external corrosion, gouges, dents, grooves, arc burns, cracks, defective girth welds, laminations and leaks.
Pressure containing sleeves feature a wall thickness equal to or greater than required for the maximum allowable operating pressure or the full strength of the pipe being repaired. The steel Repair sleeve material is certified and the carbon equivalent will not exceed 0.45 percent. Each half-sole segment comes with one pre-crimped back-up strip.
Steel Repair Sleeves can be used as pads or cradles for above ground piping, drain tile supports and patches (segments in 90° and 180° arcs, from 6-inches to 10 feet in length are available as specials).
Each Steel Repair Sleeve has standard bevels with a back-up strip and material certifications. Sleeve ends are square cut. Back-up strip are not included with Standard Girth Weld Steel Repair Sleeves but are available as special order.
The half pipe sleeves can be used in case of leaks, dents, corrosion, cracks & faulty girth welds. Every repair sleeve are provided with standard bevels with a backup strip.
Material used are structural quality carbon steel or pressure vessel quality carbon steel plates, which are to ASTM specifications, and in the following grades:
The chemical composition does not exceed the percentages specified for the ASTM material ordered. Repair sleeves are fabricated from plate with low carbon equivalency for good weld ability.
The maximum allowable carbon equivalency (CE) quality carbon steel plates will be based on the heat analysis.
The maximum allowable carbon equivalency (CE) pressure vessel quality carbon steel plates will be based on the heat analysis, in most cases.
Note : The sleeve can be manufactured in any grade as per the application & client requirements.
Our half pipe sleeve are manufactured from the best quality carbon steel material. We pride ourselves on making the half sole by rolling, die forming and step braking and they never undergo heat treating. Thus making our expertise & technique best in the industry. If a client specifically asks for longitudinal edges of the half pipe sleeve to be beveled for welding, it can be done. Half pipe sleeves ends have shaved square edges to enable fillet welding, although square end bevel can also be made as per client specification. Our for repair sleeves are made with carbon steel plates with low carbon equivalency to ensure good weld ability.
Half Pipe Sleeve can be milled on the inside longitudinal edges for the backing strips. Depth of 1/16″ (.0625) -0″ + 1/32″ and width of 5/8″ (.625) -0 + 1/16″ on each side. Outside longitudinal edges are beveled 30° (+5° – 0° ) for welding.
Backing Strips
Backing strips are hot rolled commercial carbon steel sheet and strip of commercial quality, A-569/A1011 SS GR33 in coils and cut lengths having a maximum carbon of 0.15%. 1 1/4″ wide, 16 gauge (.0598) with a tolerance of: min. .0538 – max. 0658, 10′ long, pre-crimped (10 degree total bend).
All of our sleeves are manufactured from quality, carbon steel material, all of which are up to ASTM/ASME specifications. We keep copies of material test reports on file and verify heat numbers prior to producing all parts.
We can manufacture half pipe sleeve in any custom steel grades and of any size as per the application & requirement of the customer.
Inspection Of Half Pipe Sleeves
Every half sleeve is meticulously examined and inspected for defects before delivery. The shipment is thoroughly tested and verified for durability and stability.
Our quality experts first review the entire shipment of half pipe sleeves before we dispatch them to our clients. Parts that do not meet our strict standards are rejected and not shipped.
Mill test reports will be furnished on all materials. Stock plate is not available with a maximum hardness guarantee. Independent testing may be performed to check the hardness on stock plate. Additional independent testing available to include: destructive, magnetic particle, liquid penetrate, ultrasonic and radiographic.
Longitudinal edges are beveled to 30 degrees (+5 degrees -0 degrees), with a root face (land) of 1/16″ (+-1/32″). This will be a mechanical type bevel or by plasma torch burning. Beveled ends are available upon request. Inside diameter of each Half Pipe Sleeve is fabricated to match the outside diameter of standard nominal line pipe. Half Pipe Sleeve are manufactured so that when two halves of the sleeve are placed on the pipe, their total circumference shall equal the circumference of the pipe minus a gap between the longitudinal edges on either side of 1/16″ (-1/16″+1/32″) for welding.
Every half sleeve pipe is marked for the size, thickness, dimension & grade of steel before shipping across India & abroad. Any half sleeve pipe not meeting the requirements for visual inspection or dimensional tolerance are rejected.
The half pipe sleeve can be used for internal and external corrosion, gouges, dents, grooves, arc burns, cracks, defective girth welds, lamination and leaks.
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