Grandpipe determines quality criteria for all raw materials used. Raw materials are delivered with vendor certification demonstrating their compliance with acceptance criteria of Grandpipe. Additionally, all raw materials are tested as sampling base prior to their use.These tests ensure that pipe materials comply with specifications as stated.
Main raw material groups used in GRP pipe production are mentioned below:
All finished goods (GRP Pipes) are subjected to following control steps:
On a sampling basis, following control steps are performed:
Physical Properties
Control steps based on sampling method define initial physical properties of pipes. Long term performances of the pipes are considered at following articles. These test are performed according to defined Grandpipe quality criteria. This criteria is determined by referring upper limits of local and international standards. Test results are the main parameters to get the quality in assurance for finished good pipes.
Long Term Performance Criteria
General requirement of whole standards is to obtain minimum performance criteria. In GRP pipe systems, long term performance is the main quality criteria beyond short term or initial performance.All quality criteria of Grandpipe are designed including long term performance. By considering several operating conditions, mostly important items are as follows:
In addition to main performance criteris, Grandpipe GRP pipes are tested for:
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