PIPE INSIDE PE PLASTIC LINING PROCESS
ACCEPTANCE OF PRODUCT TO THE FACILITY
Pipes to be sent to our facility for PE coating are checked by Rubiliner, with isometric drawings, if any, in accordance with our technical specifications. Please contact us for the conformity of the shape, weight and length of the pipes for the process.As a result, the pipes that require revision are notified to the customer.Faulty pipes are corrected by the customer and sent to our solution partner in Tuzla / Istanbul for chemical surface cleaning.
REQUIRED PIPE SPOOL SHAPES and AVERAGE LINING THICKNESS
SURFACE PREPARATION
Pipes are sent by Rubiliner for surface chemical cleaning and parkerizing to Pastem Ltd. This ensure rust free surface and extra protection against rusting at service. CuNi and stainless steel pipes do not require surface preperation for polyethylene coating.
PE COATING PROCESS
The interior of the black carbon steel pipe is painted with epoxy after chemical surface preparation.
Powder polyethylene is filled into steel pipes, pipe ends are blunted and processed at 180 – 250 C in large 2-axis rotating furnaces. These temperatures are below the heat treatments for steels.
Our goal is to provide our customers with economical pipes resistant to turbulence, cavitation and corrosion with PE coating.
INSPECTION AND TESTS
Visual inspection is performed to all PE coated pipes coming out of the process The coating quality and surface are checked by the quality control engineer. Defective pipes are taken to the coating process again.
Thickness test is performed with a thickness gauge on PE coated pipes. Under the supervision of the quality control engineer, measurements are made by determining at least 5 measurement points in the lining and flange mouths of the pipe. According to Rubiliner process standards, measurement results are required to be in the range of 1500-3000 microns (1.5-3 mm). Measuring ranges can be re-determined according to the demands of our customers.
Within the scope of our quality assurance studies, an adhesion test is performed by taking samples from PE coated pipes.
Within the scope of our quality assurance studies, a fatigue/adhesion test is performed by taking samples from PE coated pipes.
Within the scope of our quality assurance studies, long-term corrosion tests are carried out by taking samples from PE coated pipes.
In the epoxy interlayer polyethylene coating sample kept in aggressive acidic (sulfuric acid ph: 0) solution at 60 C, it is tested that the acid melts the metal but does not damage the polyethylene coating.
Randomly section checks.
Corrosion tests of the samples of the PE coated pipes were carried out at the Turkish Standards Institute.
Tensile tests of the samples of the PE coated pipes were carried out at the Turkish Standards Institute.
PACKAGING AND TRANSPORTING
Outside surface of PE coated pipes are painted with anti-rust paint and flange surfaces are fitted with a MDF protective cover and made ready for transport. Spool numbers and rubiliner numbers labes are pasted to pipe surface. Transporting of the pipes is under the responsibility of the customer.