Insulated elbows are a type of thermal insulation pipe fittings, consisting of a high-density polyethylene sheath, polyurethane foam insulation, and an inner working steel pipe tightly bonded together. Insulated elbows are primarily used for the转向 of insulated straight pipes, generally used in conjunction with insulated pipelines. They are designed to compensate during thermal insulation pipeline design, ensuring the elbow sections also have sufficient insulation properties. Standard elbow angles: 30 degrees, 45 degrees, 60 degrees, 90 degrees.

Insulated elbows are widely used in liquid and gas transmission pipelines, including chemical pipeline insulation projects, oil and chemical industry, centralized heating networks, central air conditioning ventilation pipelines, and municipal engineering pipeline bends. 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, thermal insulation of fittings, sliding lubrication, exposed pipe ends, and waterproofing and corrosion prevention in various pipeline projects involving heating, cooling, power, and chemical industries.

Insulation elbow structure:

High-Density Polyethylene Coating: The high-density polyethylene pipe protects elbows from corrosion and vegetation damage, 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: Withstands high temperatures, maintains medium temperature, ensures the outer sheath surface remains at normal temperature, insulates internal working pipe components, and prevents the foam from carbonization.

3. Working Steel Pipe: Ensures normal flow of conveying medium.

Construction Notice:

1. Avoid soaking in groundwater and rainwater during construction. If the end is accidentally soaked, a drying treatment should be conducted before connecting the outer sheath.

2. Pipe materials should be stored on a flat ground, neatly stacked, with a stacking height of less than 1.5 meters.

3. Pipe materials must be lifted and placed gently, avoiding collisions and throwing. Do not use wire ropes to directly hoist the pipe bodies.

4. Insulation and anti-corrosion layers should be kept away from direct flame contact. Follow the following procedure for on-site installation: Excavate the trench – Prepare the base (drainage, sand bedding) – Lay pipes – Weld steel pipes – Inspect (water pressure test) – Install (test pressure) – Foam – Seal foam holes. Personnel can be sent to the construction site for insulation work on elbows and joints, including the installation of the joint sleeve, connecting the joint sleeve to the main pipe, sealing it, and foaming the joint on-site. However, this does not include the welding of the steel pipe sections at the joints.