Quality Management

Great emphasis is placed on raw material quality specifications and requirements. Through rigorous controls on vendor evaluation/selection system, purchasing process and material acceptance process, we ensure that the right material is sourced from the most appropriate vendor.”

Bare pipes are manufactured, inspected and tested using state of the art equipment.

Non-Destructive Testing Facility:

Ultrasonic Testing (UT) Units:

Manual UT Unit: To further examine the size and nature of defects in the weld metal or pipe body by utilizing portable unit.
Online Automatic UT Unit: To ensure that the weld seam of the pipe being produced and the base plate is flawless.
Offline Automatic UT Unit: Special supplementary tests required by some clients.

Radiographic Inspection Units:

Fluoroscopic Inspection: X-rays are utilized to assess the size and nature of defects using digital radiography technique.
Pipe End Inspection: X-rays are used to capture the image of the pipe end welds digitally or on radiographic film.

Visual Inspection Setups:

In Process Visual Inspection (HRC): To inspect the HRC being fed into pipe mill for pipe manufacturing.
In Process Visual Inspection (Pipes): To inspect surface defects and verify physical dimensions.
Final Inspection: To verify if the product meets all the requirements and decide its final status.

Hydrostatic Pressure Testing Unit:

To verify strength and ensure durability of the pipes.

Residual Magnetism Measurement Equipment:

To ensure residual magnetism is within acceptable limits in order to facilitate joint welding of pipes at site.

Hardness Testing:

Portable hardness tester is utilized to verify the hardness of hard spots identified on pipe.

Magnetic Particle Inspection (MPI) Apparatus:

To verify the surface or subsurface imperfections in metals.

Dye Penetrant Testing (DPT) Apparatus:

To verify minute surface defects that are difficult to inspect with or without visual aids.

Destructive Testing Facility:

Universal Testing Machine:

Tensile Testing: To check the yield strength, tensile strength and elongation in the material.
Guided Bend Testing: To ensure proper fusion of weldment and parent metal.

Impact Testing Machine:

To test the fracture toughness of the pipe body, weld and heat affected zone (HAZ).

Chemical Testing Machine:

To verify the chemical composition of the metal.

Universal Hardness Testing Machine:

To check hardness of the material.

Burst Testing Equipment:

To ensure that the pipe meets the minimum design pressure requirement rather than exceeds.

Our state of the art coating plant is equipped with the most sophisticated and advanced technology for coating application. Different destructive, non-destructive and accelerated tests are carried out to ensure coating quality. Coating application, inspection and testing is carried out in accordance with international standards. These methods include:

Pre-Coating and In-Process Inspection

Bare pipe is inspected for any possible surface defects that could be detrimental to coating before and after shot blasting of external surface of pipe. Environmental temperature, humidity, pipe surface temperature and different operational parameters are monitored critically to ensure that the most suitable environment is maintained and the pipe surface is prepared appropriately for the coating operation.

Post Coating Inspection and Testing

After the coating is applied and cooled, various inspections, destructive and non-destructive tests are carried out to evaluate the coating application.

Non-Destructive Testing Facility

Holiday Testing Units:

Online Holiday Test Unit: High voltage up to 25 kV is applied on coated pipe surface immediately after the applied coating is cooled to ensure that coating is free from unacceptable discontinuities and voids.
Portable Holiday Test Unit: Used to carry out the holiday testing of the coating line when required.

Coating Thickness Measurement Devices:

Eddy current technique is applied to determine the dry film coating thickness of different layers of coating and combined thickness of the three layer PE/PP (polyethylene/polypropylene) coating.

Visual Inspection of Coated Pipe Surface:

To ensure that the applied coating is free from any unacceptable defects and the marking and traceability requirements have been fulfilled.

Impact Test at Ambient and Raised Temperatures:

To ensure that the coating meets the desired toughness criteria.

Destructive Testing Facility

Peel Adhesion Test:

To verify the peel strength of the top coat (HDPE) with first layer (FBE) in a three layer coating system.

Impact Test at Low Temperatures:

To ensure that the coating meets the desired toughness criteria for low temperature applications.

Cathodic Disbondment Test (CD Test):

To check the bonding of the first layer (FBE) with the pipe surface in a three layer coating system.

Elongation Test:

To check the elasticity of the polymer used.

Hot Water Soak Test:

To test the coating to provide adequate protection in immersion condition.

Flexibility Bend Test:

To determine coating elongation and resistance to crack when pipe is subjected to certain bends or deformation after coating application.

Melt Flow Index Test:

To determine the melt flow index of the coating materials and coating layers.

Differential Scanning Calorimetry:

To analyze coating powder and coating film’s thermal characteristics.

Internal surface of the pipe is prepared before application of internal coating. Pre coating pipe surface inspection is carried out to ensure the desired level of cleanliness and surface profile has been achieved. During coating application the environmental conditions and the operational parameters such as environmental temperature, humidity, mixing ratios of the liquid coating, pipe surface temperature and wet film thickness are monitored critically.

Internal Coating Inspection and Testing

Various destructive and nondestructive inspections and tests are carried out during the coating application process for evaluation.

Non-Destructive Testing Facility

Holiday Test:

To carry out the holiday testing of the coating line, when required.

Coating Thickness Measurement:

Wet Film Thickness Measurement: Wet film thickness measurement devices are used to verify the coating thickness.
Dry Film Thickness Measurement: Eddy current technique is applied to determine the dry film coating thickness.

Visual Inspection of Coated Pipe Surface:

To ensure that the applied coating is free from any unacceptable defects and the marking and traceability requirements have been fulfilled.

Solvent Rub Test:

To check the curring of the coating film.

Destructive Testing Facility

Adhesion Tests:

To check the bonding of coating with steel pipe, Pull-off Adhesion Test and Cross Cut Test is carried out

Coating Hardness Test:

To ensure that the coating applied meets the hardness requriements.

Coating Porosity Test:

To check porosity and presence of foaming.

Impact Test:

To ensure that the coating meets the desired toughness criteria for low temperature applications.

Cathodic Disbondment Test (CD Test):

To check the bonding of coating with the pipe surface.

Hot Water Soak Test:

To test the coating to provide adequate protection in immersion condition.

Flexibility Bend Test:

To determine coating elongation and resistance to crack when pipe is subjected to certain bends or deformation after the coating application.

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