Optimizing Surface Preparation: Micro-Dust Treatment and Preheating for Epoxy Coated Pipes

Introduction

High-quality epoxy coated pipes rely on precise surface preparation to ensure superior adhesion and long-term corrosion resistance. Two critical steps in this process are micro-dust removal and preheating, which directly impact the performance of the epoxy coating. This article explores best practices for preparing steel pipe surfaces before applying epoxy coatings, ensuring durability and compliance with industry standards.

1. Micro-Dust Treatment for Epoxy Coated Pipes

After shot blasting, steel pipes must undergo micro-dust treatment to eliminate residual rust particles before epoxy powder coating. Here’s the correct procedure:

① Dust Removal Process

· A secondary cleaning system removes fine dust from the pipe’s exterior.

· Epoxy coated pipes must be coated within 4 hours of treatment; otherwise, re-cleaning is required to prevent rust reformation.

· Startup sequence: Activate the exhaust fan before turning on the dust removal motor.

· Shutdown sequence: Stop the dust removal motor first, then turn off the exhaust fan.

② Maintenance & Monitoring

· Regularly empty the cyclone dust collector to prevent clogging.

· Inspect the exhaust fan’s performance during operation.

· Perform scheduled maintenance on the dust removal electrodes.

· Check the pipe’s surface cleanliness hourly during production.

2. Preheating for Epoxy Powder Coating

Preheating ensures optimal epoxy adhesion by preparing the pipe’s surface temperature before coating.

① Preheating Process

· Use a KGPS-750UW constant-power medium-frequency heater to heat the pipe.

· The preheating temperature must match the epoxy powder manufacturer’s specifications (not exceeding 275°C).

② Equipment Checks

· Verify the medium-frequency water circulation system (maintain 2.5–3 m³ of water).

· Inspect pipelines for leaks before activation.

· Adjust power settings based on pipe diameter and feed speed.

③ Temperature Control

· Use infrared thermometers for accurate readings.

· Record preheating temperatures hourly to ensure consistency.

Why Choose Properly Prepared Epoxy Coated Pipes?

Proper micro-dust treatment and preheating are essential for:
✔ Stronger epoxy adhesion – Prevents coating delamination.
✔ Enhanced corrosion resistance – Extends pipe lifespan.
✔ Compliance with industry standards – Ensures reliability in harsh environments.

Looking for High-Quality Epoxy Coated Pipes?

As a leading manufacturer of epoxy coated pipes, we guarantee:
✅ Advanced surface treatment for maximum coating durability.
✅ Strict temperature control to meet epoxy application standards.
✅ Custom solutions for oil & gas, water supply, and chemical industries.

Contact us today for premium epoxy coated pipes tailored to your project needs!