Product and Services Overview

- Carbon Steel  Grade 250 or higher. ( API , ERW , CLS – Concrete lined steel )

- General Engineering & Pipework.

- Concrete lining of pipes & Hand-lining done with Renderock.

- Custom fittings to suit client needs

- General Engineering ( Steel )

- Handrailing systems , Platforms , Stairwells, Access hatches , Door framings etc

Please find below specifications of our pipe products:

CLS ( Concrete lined steel pipe ): Concrete lined steel pipe offer a durable and efficient solution for various applications, combining the strength of steel with the corrosion protection and hydraulic benefits of a cement lining. Here at REES we hand-concrete line our pipes in-house with a Dricon Castle Shotcrete mixture containing Graded dry sand, Basalt aggregate & Portland cement plus admixtures making these pipes the perfect application for Sewerage / Waste pipe , Watermains, Potable water & Irrigation.

Cement mortar is typically mixed with a cement/sand ratio of 2 to 1. They are mixed with water to form a slurry that is delivered to the rotating pipe in closely controlled quantities. Once the slurry is delivered, the pipes rotation speed to accelerated to rotation speeds of as much as 1200rpm and radial acceleration of as much 200G. The Centrifugal forces distribute the lining around the pipe circumference and compact it against the pipes walls. This rapidly consolidates the mortar driving off excess water and leaves a uniformly dense smooth compacted lining, with a very low water to cement ratio. Matched with the low void content. This results in a strong and low permeability cement mortar lining.

Note: These linings perform much better than cast concrete, due to high cement content, low void content, and low water content of cement mortar.

• Corrosion protection: The cement lining protects the inner steel surface from corrosion, ensuring the longevity of the pipeline. 
• Durability: Cement lining provides a hard and smooth surface, enhancing the overall durability of the pipe. 
• Hydraulic Efficiency: The smooth lining minimizes turbulence and flow disruptions, improving hydraulic performance, especially in large-diameter pipes. 
• Seismic resistance: Concrete lined steel pipes not only have great lifetime durability but also can withstand reasonable seismic movement, as the Cement linings are fairly flexible.
• Autogenous Healing: The Concrete lining of the steel pipe is Water-Curing and is susceptible for cracks up to 1mm in size as these will water cure on their own.

API / ERW: API ERW pipe refers to electric resistance welded (ERW) steel pipe that conforms to the specifications of the American Petroleum Institute (API) standard. These pipes are commonly used in the transportation of oil, natural gas, and water. They are manufactured by welding the edges of a steel plate together using electric resistance welding. 

• API : This is a widely recognized standard for steel pipes used in the oil and gas industries. 
• ERW : ERW stands for Electric Resistance Welded. This is a specific type of welding where high-frequency current is used to heat and join the edges of a steel plate, forming a welded seam. 
• Applications: Transportation of natural oils & gasses, Water pipelines & General piping needs in various kinds of industries.
• Manufacturing Process: A steel coil is formed into a tube-shape, the edges of the tube are then heated using a high-frequency electric resistance welding, the edges are then pressed together, creating a welded seam, the pipe is then cooled off & completed.
• Cost Efficiency: ERW pipe is a lot more cost-effective in comparison to API pipe due to the efficiency in how this pipe can be manufactured.

Stainless Steel pipe: Stainless steel pipe has excellent corrosion resistance due to its high chromium content, it is commonly used in water and wastewater treatment plants due to its corrosion resistance and durability. It is used for transporting both clean and wastewater, as well as for various treatment processes as well as exceeding in both wet & corrosive environments.

• Grade 304 Stainless has a composition of 18-20% Chromium (Cr) and 8-12% Nickel (Ni) and is generally purposed for applications such as sanitary process lined for food & beverages , or general fabrications.
• Grade 316 Stainless ( Marine Grade ) has a composition of 16-18% Chromium (Cr) and 10-14% Nickel (Ni) as well as 2-3% Molybdenum (Mo), Grade 316 has a higher resistance to pitting and corrosion in non-oxidising acids and is typically utilised in water transfer pipelines and marine / salt water or harsh outdoor condition / applications.