OCTG Internal Anti-Corrosion Coating Line for Oil Tubing, Casing & Drill Pipe

No.

Equipment

Function / Description

Remark

A. Loading & Surface Preparation

1

Steel Pipe Auto Loading & Rotating Device

Automatic pipe feeding and pipe-body rotation at fixed station; automatic loading/unloading.

Thread cleaning

2

Thermal Cleaning Oven

Batch-type oven for removing residual oil, grease and old coating from pipe surface.

Near-continuous operation

3

Basket-type Pipe Loading / Unloading System

Charging and discharging of pipe bundles into/from the thermal oven.

Energy saving

4

Internal Shot Blasting System

Inner-wall abrasive blasting to achieve required anchor pattern and Sa 2.5 cleanliness.

OCTG dedicated

5

Vibrating Abrasive Recovery Conveyor

Recovers and recycles blasting media from the blast cabinet.

New structure

6

Multi-point Dust Collection System

Dust extraction at blasting and transfer stations to keep the workplace clean.

Environmental

7

External Thread Blasting & Purging Unit

Automatic blasting and air purging of external threads after internal blasting.

End treatment

B. Coating & Curing

8

Internal & External Spraying System

Internal FBE powder / liquid epoxy primer and topcoat spraying, with automatic pipe loading/unloading.

FBE / Epoxy

9

External Thread Spraying Unit

Spray coating on external thread area after internal coating.

End treatment

10

Double-layer Drying & Curing Oven

Upper deck for tubing, lower deck for casing and drill pipe; energy-saving batch curing.

Energy saving

C. Inspection, Marking & Downstream

11

Final Inspection Station

Automatic inspection of internal coating quality; non-conforming pipes rejected automatically, data recorded.

Auto rejection

12

External Coating & Marking System

Steel stamping, high-pressure airless external spray, cooling rack, coupling color-coding and ink-jet marking.

Integrated unit

13

Bundling, Steel Strapping & Palletizing System

Automatic casing bundling with steel strap, automatic palletizing and finished-pipe unloading.

Downstream

14

Coupling Make-up Unit

Automatic coupling threading onto pipe ends.

Optional