Insulation elbows are a type of thermal insulation pipe fittings, composed of a high-density polyethylene jacket, polyurethane foam insulation, and a tightly bonded inner working steel pipe. Mainly used for the turning of insulated straight pipes, they are generally used with insulated pipelines and are designed to compensate during the insulation project pipeline layout, ensuring that the elbow sections also possess adequate insulation properties. Standard elbow angles: 30 degrees, 45 degrees, 60 degrees, 90 degrees.
Insulated elbows are widely used in pipeline networks for the transportation of liquids and gases, in insulation projects for chemical pipelines, oil and chemical industries, centralized heating networks, central air conditioning ventilation pipelines, and pipeline bends in municipal engineering projects. Insulated pipes (including elbows, tees, and crosses) are high-performance, safe, and cost-effective pre-insulated buried pipes. They effectively address issues such as insulation for heating, cooling, thermal power, electricity, and chemical pipeline projects, including insulation of elbows, sliding lubrication, protection of exposed pipe ends, and waterproofing and corrosion prevention at bends.
Insulating elbow structure:
1. High-Density Polyethylene Coating: The high-density polyethylene pipe protects elbows from corrosive substances and plant corrosion, extending the service life of the pipe fittings. It supports the working pipe and can withstand certain external loads, ensuring the normal operation of the working pipe.
2. Polyurethane Foam Layer: Withstanding high temperatures, ensuring medium temperature, maintaining the surface of the outer sheath at normal temperature, insulating the inner working pipes, and ensuring the foam is not carbonized.
3. Working钢管: Ensures normal flow of transmission medium.
Construction Notice:
1. Avoid soaking in groundwater or rainwater during construction. If the end is accidentally soaked, dry it before connecting the outer sheath.
2. Pipe materials should be stored on a flat ground, neatly arranged, with stacking height less than 1.5 meters.
3. Pipe materials should be lifted and placed with care, avoiding collisions and throwing. It is forbidden to hoist the pipes directly using wire ropes.
4. Insulation and anti-corrosion layers should be kept away from direct flame contact. Follow the following installation procedure on-site: trench excavation – subgrade treatment (drainage, sand bedding) – pipe laying – steel pipe welding – inspection (hydrostatic testing) – installation (pressure testing) – foaming – sealing foam holes. Personnel can be sent to the construction site for the insulation work on elbows and joints, including the installation of the joint sleeve, the connection and sealing of the joint sleeve to the main pipe, and the foaming work on-site joints, but not including the welding of the steel pipe sections at the joints.
