Steam Insulated Pipe

"Steam Insulated Pipe" is a prefabricated, direct-burial piping system developed by Xingbang for high-temperature steam transport. It utilizes a "steel-in-steel" structure, suitable for temperatures ranging from 150°C to 350°C and operating pressures up to 2.5 MPa. The product serves sectors such as municipal district heating, petrochemicals, and industrial park steam supply. Xingbang possesses the capacity to supply a full range of sizes (DN20–DN1200 mm) with an annual production output of 1,000 kilometers.

Internal Sliding

The carrier pipe slides within the insulation layer, while the insulation material remains fixed to the outer casing. This compact structure eliminates the need for internal support rings and reduces corrosion risk; however, the weight of the carrier pipe can cause the insulation layer to become eccentric or crushed.

External Sliding

The carrier pipe and insulation layer slide as a single unit against the inner wall of the outer casing. Internal support rings prevent insulation eccentricity or crushing; the system offers excellent moisture venting and straightforward structural analysis. It is the mainstream design globally, particularly suitable for areas with high groundwater levels.

The carrier steel pipe undergoes shot-blasting to reach the Sa2.5 cleanliness standard, followed by preheating and the application of a high-temperature resistant primer. It is then wrapped in composite insulation material and fitted with sliding supports. After being inserted into the outer protective steel casing, it receives 3PE or FBE anti-corrosion coating. Finished products are released only after passing a 100% airtightness test. Xingbang employs a "one-step" molding process featuring continuous multi-stage operations, boosting production efficiency by 20%–40%.

Municipal district heating networks for high-temperature steam

Steam transmission pipelines for petrochemical enterprises

High-temperature steam pipelines for thermal power plants

Centralized steam supply systems for industrial parks

Areas with high groundwater levels where trench excavation is unsuitable

Long-distance steam transmission projects in extremely cold regions

Xingbang offers customized steam insulated pipe solutions tailored to specific project conditions, covering the following aspects:

Pipe Diameter: Full range customization from DN20 to DN1200mm to meet various flow rate requirements.

Insulation Thickness: Optimal thickness determined via thermal calculations based on medium temperature, pipe diameter, and heat loss requirements, balancing thermal performance with overall costs.

Sliding Structure: Choice of internal or external sliding structures based on project conditions; external sliding structures are recommended for high-groundwater areas.

Outer Casing Anti-Corrosion: Options include 3PE or Fusion Bonded Epoxy (FBE) powder coatings; anti-corrosion specifications can be upgraded based on the project's corrosivity rating.

Pipe Length: Individual pipe lengths customized according to transportation logistics and on-site installation requirements.

With over 140 national patents and experience participating in the drafting of more than 70 industry standards, Xingbang provides specialized designs for challenging conditions such as extreme cold and high-groundwater geology. We ensure the delivery of custom orders through three dedicated production lines for steel-cased steam insulation pipes.

Case Study 1

 

Heating Project for a Food Industry Park in Mongolia

Product: Overhead steam-insulated piping

Project Overview: Xingbang supplied overhead steam-insulated piping for the park's heating system. The pipes were specially designed for the extremely cold climate to ensure stable, long-term operation during winter. Customer Feedback: "This batch of pipelines operated continuously under extreme winter low temperatures; the metal outer casing showed no deformation or cracking, and the insulation layer showed no signs of moisture. The moisture exhaust pipe drained normally during the warm-up phase, and steam dryness remained stable after commissioning, meeting the park's production steam requirements."

Case Study 2

 

Mongolia District Heating Project

Product: Overhead steam insulated piping

Project Overview: Xingbang supplied high-standard overhead steam insulated piping, specially designed for frigid regions to ensure the long-term reliable operation of the heating system.

Customer Feedback: "On-site joint sealing was convenient, and the mechanical interlocking seal of the outer casing was reliable. Spot checks of surface temperatures at fixed supports after operation showed effective thermal bridge control, with heat loss lower than the design value."

Case Study 3

 

Vietnam Industrial Park Steam Pipeline Project

Product: Medium- and low-pressure steam insulated piping

Specifications: DN100–DN500mm

Quantity: 2,000 meters

Project Overview: Supplied medium- and low-pressure steam transmission piping for the industrial support zone of the park, meeting the steam needs of manufacturing enterprises.

Customer Feedback: "After commissioning, the pipeline met the production steam requirements of multiple enterprises, with steam temperature and pressure at the terminal end remaining within process specifications. Inspections after six months of operation showed no corrosion on the outer casing, the insulation layer remained intact, and there were no leaks at the joints."

 

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