Insulating joints are manufactured using insulating materials, offering strong insulation properties, hence the name. Insulation is the primary feature. The insulation resistance is 10MΩ, significantly enhancing the operational lifespan of the pipeline, ensuring a long service life equivalent to the pipeline itself. Moreover, thanks to advanced technology and processes, these insulating joints are of high strength and offer various connection options for the user, including flanges, welding, and threaded connections.
Insulating joints are a general term for pipeline joints that require insulation properties, including sealability, strength, and electrical corrosion prevention, for buried steel pipelines. They include components such as insulation plates, packing materials, sealing rings, and short pipes.

Rubber soft joints are made without recycled rubber, using natural and chlorinated butyl rubber compounds. They are capable of withstanding water, steam, weak acids and alkalis, eliminating the sweating phenomenon of the spheres, extending the service life, and ensuring a product lifespan of 5-10 years. The rubber raw materials and accessories are all quality-assured products, with spheres free of odors and a resistance to aging five times that of engineering rubber joint spheres. They are formed by an automatic molding machine using a solid winding method, are resistant to high pressure, and can withstand a test pressure of 50 kg, three times the tensile strength of manually formed joints. The rubber soft joints leverage the elasticity, weather resistance, high airtightness, chemical resistance, and radiation resistance of rubber. After being compounded with high-strength, cold and heat-resistant polyester canvas, they are vulcanized under high pressure using high-precision molds, resulting in a smooth and finely textured rubber surface, quality that is evident. The inner diameter is standardized, covering basic engineering fields such as chemicals, construction, water supply, drainage, oil, food, machinery, refrigeration, sanitation, plumbing, fire protection, environmental protection, coastal areas, and electricity. They are particularly suitable for pipelines with significant vibration and frequent changes in temperature and humidity.
Reduce fatigue coefficient
Due to the inherent properties of both natural and synthetic elastomers, and because of the steel-rubber interface at the joints and mating flanges, they do not fatigue crack or become brittle, nor do they produce any electrolytic action.
Exceptional wear and corrosion resistance for all industrial use
Utilize a variety of natural, synthetic, and specialty elastomers and fabrics. Processed and combined materials can meet a wide range of actual pressure/temperature operating conditions, corrosion, erosion, wear, and abrasion. Refer to technical specifications and applicable piping for suitable media and industries.
Compact face-to-face dimensions, while accommodating larger movements
The rubber expansion joint features a short face-to-face length and offers excellent movement capabilities in axial compression, axial extension, lateral deflection, as well as in angular and torsional directions.
Rubber
The inherent flexibility of the spring stiffness reduces the rubber expansion joint's inherent flexibility allows for nearly unlimited deflection and recovery from imposed movements, thus requiring relatively low force and avoiding damage to the power equipment.
No installation gaskets required
Flanged sulfur rubber and fabric integrated with hoses do not provide an elastic expansion joint, so gaskets are generally not required in most applications. Please check the assembly instructions before installation.
Lightweight
Rubber expansion joints are lightweight, contributing to reduced labor costs for installation.
Minimize heat loss
Rubber expansion joints reduce heat loss and provide long-term maintenance-free service.
Design and Specifications
Advanced automatic molding machine forming, solid缠绕 technique, withstands high pressure, test pressure up to 50 kg, and has three times the tensile strength of hand-formed products.
Self-developed formula
Non-reclaim rubber-free, made with natural and chlorinated butyl rubber compounds, truly withstands high temperatures and chemical corrosion, eliminates sweating on the sphere, extends service life to 5-10 years.
Extended service life
3-year extended warranty, safe, durable, maintenance-free.