STEEL PIPES
The following joint details can be selected by considering the utilization purpose and the dimension.
Welded Joint:
The most widely used type for the joining of steel pipes. Steel pipe is relieved with bevelled ends which are madewith special equipment in compliance with the relevantstandards.
Spherical Socket Joint:
Provides the possibility of a rotation 10 degrees at thepipeline without the utilization of any special fittings. Steelpipes are welded from outside after proper erectioningaccording to required angle.
Spigot and Socket Joint:
Especially used for the steel pipes inside coated with cement mortar. Steel pipes are welded from outside after erectioning.
Flanged Joint:
The special manufactured flanges are welded to the endsof the pipe and then jointed with bolts.
PE Coating
PE coating is generally used at the petrolium and gas pipelines and being increasingly used for water projectsaswell. PE coating provides an excellent protection due to its properties such as resistance to aging and impact.
Epoxy Coating & Lining
After obtaining a proper cleanliness and roughness by shotblasting, epoxy is applied to the inside or outside of the pipe surfacebyairless-spraymethodeitherhotorcoldaccordingto the customerrequirementsand related standards. While solvent free epoxy is widely used in potable waterprojects, on the other hand, for piling purposes coal-tarepoxy or glass flake epoxy, and for natural gas transmis- sion lines flow coat epoxy are used. In addition, polyurethane based paint which is being applied hot,isused for sewagewaterlines. Used Standards: AWWA C-210, NFA 49709, EN 10289, API RP5L2, AWWA C-213, API 5L7, NACE RP 0394
Cement Mortar Coating and Lining
Cement Mortar Lining is applied to the internal surface of the pipe specially for the potable water lines. The cementmortar is applied by a spraying method to the opposite direction of a pipe which is turning with a high centrifugialforce. The cement mortar is composed of specified ratiosof high quality cement, water, silisium sand and specialadditive material. The additive material is a binding element between the cement, water and sand, but at thesame time providing a smooth lined surface and increasing the performance of the lining. Used standards: AWWA C-205, BS 534, EN 10298 DVGW GW340
Coal-Tar Enamel & Bitumen Coating and Lining
Following the blasting application, primer is applied to thepipe surface which is providing an adhesion between thepipe surface and the coating layer. Wrapping method is used for the external surface of the pipe and centrifugial method is used for the internal surface of the pipe. The glass fiber is embedded into either hot bitumen or hotcoal-tar enamel and then wrapped on the pipe surface. After completion of the coating process, the bitumen coaed pipes are lime washed and the coal-tar enamelcoated pipes are wrapped with rock shield material.These kind of coatings are preferred due to the low cost commonly in the external coating of water line projects. Used standards: AWWAC-203, DIN 30673, TS4356, BS534