Half Sleeves Repair System
A half-sleeve repair system is a versatile component used in pipeline maintenance to reinforce damaged sections without shutting down operations.
Half Pipe Sleeves are engineered components designed for reinforcing and repairing pipelines without shutdown. They offer superior elongation properties and are manufactured to match the outside diameter of standard nominal line pipe, providing a secure and durable repair solution for leaks, dents, corrosion, and cracks.
Download PDFA Half Pipe Sleeve, also known as a split casing or half wrap, is a type of repair sleeve used in pipeline maintenance and repair. It is designed to reinforce and repair pipelines that have damage or anomalies such as corrosion, gouges, dents, grooves, arc burns, cracks, defective girth welds, laminations, and leaks.
Half Pipe Sleeves are custom-fabricated to meet specific dimensional requirements, ensuring a precision fit and secure installation.
They are typically made from structural or pressure vessel quality carbon steel plates, with available grades including API 5L, ASTM A36, A572, A516, and A537, among others.
The wall thickness of pressure-containing sleeves is equal to or greater than the maximum allowable operating pressure or the full strength of the pipe being repaired.
Half Pipe Sleeves are manufactured through processes like rolling, step braking, or die forming without the use of heat treating. Longitudinal edges are beveled for welding, if requested, to ensure a secure connection with the existing pipeline.
The Half Pipe Sleeve is a versatile and essential component in pipeline maintenance and repair. Its design allows for quick and efficient repairs, minimizing downtime and ensuring the continued operation of critical pipeline systems.
Half pipe sleeves are typically installed by wrapping them around the damaged or vulnerable section of the pipe and securing them in place using fasteners or clamps. The split design allows for easy installation without the need to disconnect or cut the pipe.
Half pipe sleeves offer several advantages. They provide a cost-effective solution for repairing damaged pipes, as they eliminate the need for extensive pipe replacement. The sleeves also provide added strength and protection to the pipe, extending its lifespan and reducing the risk of leaks or failures.
A half pipe sleeve is typically a cylindrical structure that covers a portion of a pipe. It is made from materials such as steel and is designed to provide reinforcement and protection to the pipe. The sleeve is often split longitudinally, allowing it to be easily installed around an existing pipe without the need for welding or cutting.
A half pipe sleeve is roughly the size of a half pipe. Half pipe sleeves are placed over pipelines to allow proper insulation and provide enhanced protection. These components are very strong and highly reliable. A half pipe sleeve is designed with excellent mechanical strengths alongside superior elongation properties. These components have longitudinal edges, which are beveled at 30 degrees for better traction. The half pipe sleeve can be used to repair any leaks, cracks, dents, faulty welds, and corrosion. Each of these sleeves can be used alongside metal grades of different quality. We are the half pipe sleeve supplier In China who have been providing piping products and solutions for the past few decades. We not only supply quality products, but also make them available for all at reasonable prices.
Half pipe sleeves are designed to prevent internal and external corrosion and rust formation. These components protect the pipe against several pressures and forces. They can be also provided with backing strips if required. A Half pipe sleeve is manufactured using top-quality steel making use of innovative technology. This is done following all international and national standards set by different institutions.
The Half Sole Pipeline Repair allows the pipe to fully function at its pressures and forces. These repairs are an ideal option for the line, as they don’t require the pipeline to be shut when they are fitted. These components are subjected to vigorous testing and screening procedures. This helps in reducing any flaws or defects within these products. The Half Sole Pipe Repair can be custom designed in different specifications to meet different requirements. Get in touch with us to get amazing discounts on the best products in the market.
The method for material chemical analysis is done as per ASTM A751. This is as per API 5L standard section 9.10 subsection one.
Our test Method for material tensile test is done as per ASTM A370. This is as per API 5L standard section 9.10 subsection two.
This is done within 15 months according to ASTM E4 under API 5L standard section 9.10.2.2.
Shall be performed to conform to API 5L standard section 9.10.3 and within subsequent reference.
Shall be performed in accordance with ASTM A370 as per API standard section 9.10.4.
Invalidation of Tests (as per API 5L 9.11.1/2), Retests (i) Recheck Analysis API 5L 9.12.1 (ii) Recheck Analysis API 5L 912.2, Flattening Tests (API 5L 9.12.3), Bend Retest (API 5L 9.12.4), Guided Bend Retest (API 5L 9.12.5), Charpy Rest (API 5L 9.12.6), Reprocessing (API 5L 9.13).
Carbon Steel Weld-On Repair Sleeves and Stainless Steel Weld-On Repair Sleeves are designed to repair and reinforce in-service steel pipelines without shutdown or service disruption. Weld-On Repair Sleeves are suitable for the repair of weak or leaking areas caused by external/internal corrosion, damage (dents, gouges), inferior welds, defective piping materials, and other problematic causes.
These can be furnished as full-body repair sleeves or partial repair sleeves, depending on the application needs. Fittings are supplied with a standard beveled edge for welding (square-cut sleeve ends), and welding backup strips are available. Pressure-grade and structural-grade materials are available in both carbon steel and stainless steel.
Immediate availability
Built to exact pipe diameters for a custom fit
Material grades and thicknesses to meet application codes/requirements
Restores the host pipe to its original and future expected service requirements
Coatings for corrosion resistance
Beyond repair, Weld-On Sleeves can be used to cradle, support, reinforce, or pad pipelines in above-ground piping systems.
The pre-stressed sleeves are of the full-encirclement split type and are manufactured using a production process that minimizes mill defects. The axial edges of the sleeves are beveled to form a 60° weld angle on assembly for the horizontal butt joint. A recess on the inner side of each pair of half sleeves is machined (cut out) to accommodate a 3 mm thick by 18 mm wide backing strip along the horizontal joint. The backing strips are manufactured from the same material as the sleeves and are supplied. The circumferential edges of the sleeves are pre-fabricated to form a 90° lap joint with the pipe.
The internal diameter of the sleeves is designed and constructed to fit the pipe without leaving a gap between the inner surface of the sleeve and the outer surface of the pipe.
During assembly prior to welding, the maximum root gap shall be 3.0 mm on both horizontal joints. A 1.5 mm root face shall be allowed on both edges. Both the horizontal and circumferential edges shall have a smooth finish.
The sleeve surfaces shall be protected from corrosion by a suitable method, such as coating with corrosion-resistant paint or other acceptable methods.
Half pipe sleeves are commonly used in pipeline repair and maintenance. They can be used to reinforce pipes that have suffered damage or corrosion, providing structural integrity and preventing further deterioration. The sleeves can also be used to protect pipes in high-stress or abrasive environments.
Half Pipe Sleeves are widely used in various industries such as oil and gas, chemical processing, and water waste management, where pipeline integrity is critical. They offer a reliable and cost-effective solution for maintaining the structural integrity of pipelines and extending their service life.
Suitable for both internal and external corrosion, gouges, dents, and other defects, providing a robust repair solution without the need for pipeline shutdown.
Half Pipe Sleeves can be installed without shutting down the carrier line, minimizing throughput loss and reducing repair costs.
Pipeline Repair Sleeves provide a reliable and cost-effective solution for repairing damaged pipelines. Ideal for industries like oil & gas, water supply, and sewage systems.
We understand the importance of maintaining the integrity of pipelines in this sector, which is essential to ensure safe and efficient operations. Our high quality Pipeline Repair Sleeves are designed to meet the stringent standards required by the oil and gas industry and provide reliable solutions for maintaining pipeline infrastructure. Whether for minor repairs or major maintenance requirements, our Pipeline Repair Sleeves ensure long-term durability and safety. With a strong commitment to the local community and the industry, Kucher Steel is dedicated to keeping Alberta's oil and gas pipelines running smoothly and safely, reflecting our pride in contributing to this vital sector.
Here’s a detailed comparison of Type A and Type B repair sleeves:
Type A Sleeve Ends are not Welded Circumferentially to the Carrier Pipe. The Type A sleeve is not capable of containing Internal Pressure but functions as reinforcement for a Defective area. It is only used for the repair of defects that are not leaking and that are not expected to grow during service, or when the damage mechanism and growth rate are fully understood.
Designed for non-leaking defects.
Used to reinforce the damaged area and restore the pipe’s original strength.
Typically a simple, split cylindrical sleeve.
No welding directly on the pipe; The sleeve halves are normally welded together while the sleeve ends are not.
Suitable for minor defects such as corrosion pits, dents, or gouges.
Ideal for situations where welding might pose risks, such as in high-pressure environments or where the pipe material might be sensitive to heat.
Quick and easy installation.
No need for extensive shutdowns.
Minimal risk of causing further damage during installation.
Limited to non-leaking defects.
May not provide a permanent solution for severe damage.
Type B Repair Sleeve installed on a pipeline, providing a robust and permanent solution to a severe defect.
Type B sleeve ends are welded circumferentially to the carrier pipe. A Type B sleeve is capable of containing internal pressure because the ends are fillet welded to the carrier pipe. Type B sleeves can be used to repair leaking defects or defects that may eventually leak and to strengthen pipe having defects that reduce the axial load carrying capability of the pipe. The ends of a Type B sleeve are fillet welded to the carrier pipe. Since its ends are attached to the carrier pipe, a Type B sleeve can be used to repair leaks and to strengthen circumferentially oriented defects.
Designed for both leaking and non-leaking defects.
Provides a permanent repair by sealing and reinforcing the damaged area.
A more complex, welded sleeve.
Welding is required to attach the sleeve to the pipe, ensuring a leak-tight seal.
Suitable for severe defects, including through-wall defects and leaks.
Often used in critical areas where a more robust repair is needed.
Provides a permanent and robust solution.
Can handle severe and through-wall defects.
Requires welding, which can be time-consuming and requires skilled labour.
Potential for heat-affected zone issues during welding.
| Feature | Type A Repair Sleeve | Type B Repair Sleeve |
|---|---|---|
| Purpose | Non-leaking defects | Leaking and non-leaking defects |
| Construction | Clamped or bolted, no welding | Welded, provides leak-tight seal |
| Application | Minor defects (corrosion, dents) | Severe defects (through-wall, leaks) |
| Advantages | Quick installation, minimal downtime | Permanent repair, handles severe damage |
| Disadvantages | Limited to non-leaking, temporary fix | Requires welding, potential heat-affected issues |
In fact, a Type B sleeve has been used in place of a girth weld to make a tie-in on a pipeline. Because a Type B sleeve may contain pressure and/or carry a substantial longitudinal stress imposed on the pipeline by lateral loads, it should be designed to carry the full pressure of the carrier pipe. Additionally, it should be carefully fabricated and inspected to ensure its integrity.
Assess the type and severity of the defect before choosing the repair sleeve type.
Consider downtime, repair duration, and safety requirements.
Ensure the repair sleeve material matches or complements the pipeline material.
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