At Yanshan Jiuzhou Pump Pipe Manufacturing, we make the concrete pump straight pipe that carries abrasive concrete from the pump to the placing point. The twin pipe is 5 inch with a 5.5 mm wall in a 2 plus 3.5 mm construction, and it weighs about 53 kg with a tolerance of 2 kg. The inner layer is hardened to a thickest part hardness of HRC 63 or above, which is the surface that sees the concrete wear.

Double Layer Construction

A concrete pump pipe wears from the inside. The aggregate slides along the bore, and the wear is worst at the outer bend and along the straight run. A double layer pipe uses a hard inner layer for wear and a tougher outer layer for strength, so the pipe can take the pressure without a brittle failure. The 2 plus 3.5 mm wall gives a hard inner surface and a structural outer wall. The weight of the pipe matters on a boom, where every kilogram is carried by the structure.

Hardness and Service Life

The inner hardness is a practical measure of the wear resistance. The product data lists HRC 63 or above at the thickest part, and a working life of 80,000 to 100,000 cubic meters. The actual life depends on the mix, the aggregate type, the pumping pressure and the pipeline layout. A harsh mix with crushed stone wears a pipe faster than a smooth sand mix. A buyer should compare the life in cubic meters with the cost, not only the price per piece.

Pressure and Mechanical Data

The pipe data lists a tensile strength of 510 to 660 MPa, a yield point of 470 MPa minimum and an elongation of 220 percent minimum. The burst pressure is 100 bar and the maximum working pressure is 100 bar. A high rise or a long horizontal run needs a pipe that can take the pressure at the pump outlet, and the clamp and the coupling have to match that pressure. A pipe that is rated for the pressure but paired with a weak clamp is still a weak point.

Where It Is Used

The straight pipe is used on a boom pump, a trailer pump, a placing boom and a stationary pipeline. On a boom, the pipe is supported by the boom structure and the joints are close together. On a ground line, the pipe is supported by rollers and hangers, and the layout should avoid sharp bends and long unsupported spans. A pipeline that is laid out well runs at a lower pressure and wears more evenly. The same pipe family includes elbows, reducers, hoses and clamps.

Installation and Inspection

Check the pipe ends and the coupling before each job. A worn end can leak, and a damaged clamp can open under pressure. Support the line so the pipe does not carry its own weight between supports, and do not use a pipe that has been dented or has a thin wall at the bend. A pipe should be rotated from time to time to spread the wear. A pipeline that is cleaned and inspected after each pour lasts longer and is safer to use.

Clamp and Coupling

A pipeline is only as strong as its joint. The clamp, the gasket and the pipe end have to work together, and a worn end or a wrong gasket can leak at full pressure. A forged clamp is common on a high pressure line, and the bolt should be checked at each assembly. A quick coupling saves time on a boom, but it still needs a clean seat and a correct gasket. A spare clamp and a few gaskets on site avoid a stop when one is damaged.

Maintenance Plan

A fleet should record the cubic meters through each pipe and rotate the pipes in the line. A pipe that is always in the same position wears out first. A simple tag with the start date and the volume helps plan a replacement before a failure. The elbow, the straight pipe and the hose wear at different rates, so the plan should treat them separately. A small stock of the most used sizes keeps the pump working.

Working With Jiuzhou

Our product range covers concrete pump pipes, elbows, clamps, placing booms, hoses, rollers, hangers and pump accessories. Buyers who need a concrete pump straight pipe can send the diameter, the wall, the pressure, the length and the quantity. Our team will confirm the pipe, the coupling and the packing before quoting. A mixed order with elbows and clamps can be packed together, and a wear part list can be reviewed for a fleet.

Send us the pump model and the pipeline layout, and we will reply with the recommended pipe, the quotation and the next steps. A clear brief on the mix and the pressure at the start helps avoid a pipe that fits the clamp but wears too fast on the job.