Polyurethane Foam Insulation Pipe

Published:2023-08-22 | Last Updated: 2025-06-11    Views: 148

I Polyurethane Foam Insulation Pipe brief introduction

Polyurethane Foam Insulation Pipe refers to a pipeline that has been equipped with thermal insulation to reduce heat transfer between the transported contents and the surrounding environment.

Insulated steel pipes, especially the type known as Directly Buried Polyurethane Insulated Steel Pipe are widely used in various industries and applications. 

These insulated pipelines help maintain the temperature of fluids (liquids or gases) being transported, prevent condensation, improve energy efficiency, and protect the pipeline from temperature-related stress.

II. Insulated Steel Pipes Product Parameters

III. Pipe Insulation Features

IV. International General Standard for Insulated Pipes

i. International Standards for Insulated Pipes

A. EN 253:2019

a. Scope of Application: Underground district heating pipe networks consisting of a working pipe (seamless steel pipe or welded steel pipe), a polyurethane insulation layer, and a polyethylene outer casing, forming an integrated pre-insulated pipe.

b. Key Requirements:

Continuous operating temperature ≤ 120°C, peak temperature ≤ 140°C;

Steel pipe material must comply with ISO 3183 or EN 10208 standards (seamless steel pipes are preferred for pipes with DN ≤ 150);

Insulation layer closed-cell content ≥ 88%, density ≥ 60 kg/m³.

B. ASTM Standard System

a. Insulation Layer: Complies with ASTM C177 (rigid foam plastic thermal insulation performance);

b. Outer protective pipe: Follow ASTM D3350 (high-density polyethylene pipes);

c. Steel pipes: Must meet ASTM A53/A106 (seamless steel pipes) or ASTM A252 (welded pipes).

ii. Differences in working pipe standards

Note: All exported steel pipes must be shot blasted to remove rust to Sa2.5 grade (ISO 8501-1) and coated with anti-corrosion coating (such as FBE coated steel pipe).

iii. Core parameters of insulation layer and outer casing

iv. Special certifications to be aware of for exports

a. CE Certification (EU): Must pass CPR (Construction Products Regulation) testing, including fire resistance and environmental compliance (REACH);  

b. UL Certification (North America): Insulation materials must meet UL94 HB or higher flame resistance ratings;  

c. GOST Certification (Russia): Insulation pipes must comply with GOST 30732-2020 cold resistance requirements (-60°C impact test).

v. Supplementary Standards for Special Scenarios

a. High-Temperature Pre Insulated Pipeline: If the medium temperature exceeds 150°C, modified polyurethane (temperature resistance up to 190°C) or aerogel composite insulation layers (GB/T 45472-2025) must be used;

b. Earthquake-Prone Areas: Outer casings must have enhanced tensile strength (elongation at break ≥450%), and joints must undergo seismic verification in accordance with GB/T 38585.

V. FAQ

i. Are you manufacturer or a trader?

Yes, we are manufacturer, so we can control the quality and can give you the best price.

ii. Where are you?

We are in Cangzhou city, Hebei province, China

iii. Do you have free sample ?

No, our samples are paid, one contains color samples and company brochures, the price is 12.99 US dollars, and we will not include shipping costs, please know.

iv. Can I customize it?

Yes, of course.

v. What is your Payment Terms?

Batch?Order?30%?T/T?deposit?before?production,?70%?balance?before?delivery.

vi. Can I have my own logo and my own package?

Yes, we can make customer's logo and package.

vii. How long is your delivery time?

Under normal circumstances, if there is enough inventory in the warehouse, we can ship within 5 days. If there is no inventory, our production cycle is about 15-45 days according to your order quantity. If it is a custom product, it takes one month.