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This Insulating Joint from Shenyang Wensheng supports individual purchase or factory complete sets with Pig Launcher and Pig Receiver, Quick-Opening Closure and filter separators. It isolates stray currents, stabilizes cathodic protection and prevents leakage. Buried and maintenance-free, it cuts operational costs, extends equipment service life and simplifies on-site construction for pipeline projects.

Electrochemical corrosion brings hidden risks to pipeline systems due to poor insulation. The QDQ-JD series Insulating Joint solves such troubles. Made under strict standards and full tests, it features diverse sizes, pressure grades and durable materials. With superior insulation and sturdy structure, the joint adapts to harsh conditions and various media. It serves multiple pipeline scenarios, with customized service available for practical engineering demands.

Shenyang Wensheng Instrument and Equipment Co., Ltd. has focused on manufacturing pressure-bearing equipment for pipeline operation and maintenance for many years and holds complete production qualifications for supporting pressure vessel products. Our main products include The cleaning pig, The Pig Launchers, The Pig Receivers, Quick Opening Closure, Insulating Joint and other complete pipeline equipment. All products are manufactured in strict accordance with domestic industrial specifications and international general standards for pipeline equipment and have long been supplied to oil & gas, chemical, water supply and various energy engineering projects at home and abroad. This article will introduce the self-produced The Cleaning Pig of our company in detail. I. Core Working Principle of The cleaning pig All types of cleaning pigs manufactured by Wensheng adopt the industry-standard structure driven by medium pressure difference with elastic sealing and scraping function. No external power supply or complex mechanical transmission structure is required. They are applicable to various working conditions of closed pressure pipelines with stable operation and high safety, which is the mainstream cleaning solution adopted by the global pipeline industry at present. The outer diameter of the cleaning pig is slightly larger than the nominal inner diameter of the pipeline. After assembly, an elastic interference sealing structure is formed with the inner wall of the pipeline. During operation, load The cleaning pig is loaded into the Pig Launchers and sent into the pipeline. Relying on the front and rear pressure difference formed by media such as crude oil, natural gas, industrial water and compressed air inside the pipeline, continuous thrust is generated to push the cleaning pig forward uniformly along the pipeline axis. While moving forward, elastic components including polyurethane leather bowl, Rubber Pig Ball and straight blade pig disc, fit tightly against the pipeline inner wall. Through three physical effects of scraping, extruding and flushing, paraffin wax, rust, water scale, sediment and various solidified impurities attached to the pipe wall are stripped off. A pushing flow of medium is formed at the front of the cleaning pig, which transports stripped dirt, accumulated liquid and residual gas in the pipeline to the end of the pipeline together, and finally enters the Pig Receivers along with the cleaning pig to complete the cleaning of the whole pipeline. Different types of the cleaning pigs are specially optimized for different working conditions. The types of The cleaning pig produced by Shenyang Wensheng cover Polyurethane cup pig, Steel brush pig, Polyurethane foam pig, Elastic scraper pig, Scraper blade pig, Diameter Changes Pig and Polyurethane disc pig. II. Necessity of Equipping Pipelines with the Cleaning Pig Improve pipeline transportation efficiency During long-term transportation of crude oil, refined oil, natural gas, industrial water and chemical slurry, impurities such as paraffin wax, rust, sediment and corrosion residues tend to accumulate on the pipe wall, narrowing the pipeline flow diameter, increasing medium transportation resistance and raising energy consumption of supercharging equipment. Regular use of The cleaning pig can remove attachments on the pipe wall, restore the original flow cross-section of the pipeline and reduce long-term operation energy consumption. Slow down pipeline corrosion and extend the service life of equipment Long-term attachment of accumulated liquid and sludge inside the pipeline will trigger electrochemical corrosion. Ponding in natural gas pipelines and paraffin deposition in crude oil pipelines will accelerate pitting corrosion on the pipe wall, and even cause pipeline perforation in severe cases. The cleaning pig can thoroughly drain accumulated liquid and solid sediment inside the pipeline, effectively reduce the pipeline corrosion rate and greatly cut the cost of pipeline maintenance and replacement. Meet mandatory acceptance requirements for pipeline commissioning In the completion acceptance stage of newly built long-distance oil & gas, chemical and municipal pressure pipelines, industrial specifications mandate pipeline pigging cleaning to remove welding slag, sand, packaging debris left over from construction, and prevent impurities from ablating precision equipment such as pumps, valves and flowmeters. In hydraulic and pneumatic pressure test stages, the cleaning pig can separate different test media and improve the safety factor of pressure test operations. Isolate conveying media to avoid cross-contamination of materials In scenarios of food processing, fine chemical industry and alternate transportation of multiple types of refined oil, the cleaning pig can act as a fluid partition to separate two different media, reduce the frequency of repeated pipeline flushing, and save raw material loss and sewage treatment costs. Troubleshoot pipeline defects in advance to avoid safety accidents Caliber measuring and detecting polyurethane foam pigs can simultaneously detect positions of pipeline depressions, inner diameter shrinkage and foreign blockages, locate pipeline fault points in advance, and prevent hidden safety hazards such as pipeline blockage and medium leakage. Pipeline pigging is an essential process for the operation and maintenance of oil & gas, chemical and water supply projects. The full range of The cleaning pig from Wensheng adopts a mature pressure difference driving structure, featuring pure physical cleaning without pollution and no damage to pipe materials, covering multiple categories including foam type, steel frame cup type, caliber measuring type and rust removal detecting type. The company holds complete production qualifications for supporting pressure vessel products. All products are manufactured in strict compliance with domestic and international general standards and can be exported as complete sets matched with The Pig Launchers, The Pig Receivers and Quick Opening Closure. We support single-piece retail, bulk engineering procurement and non-standard customization. Our company has long provided stable and durable complete pressure-bearing pipeline equipment for various global energy engineering projects. Purchasers and general contractors worldwide are welcome to contact us for cooperation and to inquire about product parameters and quotations.

This article introduces Wensheng Insulating Joints and its procurement advantages. The company offers reliable non-standard custom pipeline fittings, including accessories matching Pig Launchers, Pig Receivers and Quick-Opening Closures. It has abundant verified engineering cases covering diverse harsh working conditions. As a professional manufacturer, Wensheng owns complete production and testing facilities, full qualifications and standardized documents. It provides one-stop services, delivering stable, cost-effective products suitable for various industrial pipeline projects. 二、高频词汇（按词组长度分类，原文核心复用词汇）

This article introduces the high-performance Pig Launcher and Receiver from Shenyang Wensheng. The equipment features wide medium adaptability, rational structure and stable sealing. It covers the full pipeline life cycle for cleaning, maintenance and testing. With safe operation, easy installation and low maintenance cost, it solves pipeline scaling, blockage and low efficiency, ensuring long-term stable operation of industrial pipelines.

This article by WenSheng Instrument explains how to select pig launcher and receiver parameters. It covers design pressure from 1.0MPa to 25.0MPa, diameters DN100–DN1400mm, dimensional design, and materials like Q345R, 16Mn and stainless steel. Proper selection ensures safe, efficient pigging for oil, gas and chemical pipelines.

Wensheng Instrument is a professional Chinese manufacturer deeply engaged in pipeline equipment. It independently develops and produces high-quality pig launchers and receivers equipped with self-designed Quick Opening Closures. With stable performance, custom solutions and strict quality control, its products serve petroleum, natural gas and chemical industries, ensuring safe and efficient pipeline operation and maintenance.

This article introduces pig launchers and receivers, which work with cleaning pigs to clean pipelines. Made of high-strength steel, they send and receive pigs, collect dirt, and prevent pipeline scaling and blockage, ensuring safe and efficient pipeline operation.