How to chose concrete pumping pipe?
Concrete pumping pipe is common wear parts for truck-mounted concrete pump or a trailer pump. Before starting to buy, it is necessary to understand the basic knowledge of concrete pumping pipe, including materials, application, diameter and length, and how they affect the overall performance and service life of the concrete pump.
Why do we spend time selecting concrete pumping pipe tube? First, to save the total cost of wearing parts, we must choose concrete pipe with high cost performance. Second, replacing concrete pipe also requires time. High-quality concrete pipe have a long service life and reduce replacement costs. Third, choosing the right concrete pumping pipe tube can avoid safety accidents. During the high-pressure operation of the concrete pump, poor-quality concrete pipes are easy to burst accidents.
This article will analyze different concrete pumping pipe in detail to help you better understand the classification of these various concrete pipe tube and how to chose concrete pumping pipe according to actual requirement needs for your engineering construction.
Concrete pumping pipe series
According to the production process, concrete pumping pipe can be divided into seam welded pipe and seamless pipe. At present, concrete pumping pipe are mainly made by seamless steel pipe integral forming technology, and then process with various heat treatments.
According to the different lengths, they are divided into universal common pipe (3m), non-universal pipe ( 1m, 2m, 2.2m), etc. The sizes of non-standard pipes with different boom lengths are also different.
According to the pressure, it is divided into high-pressure pipe and low-pressure pipe. As the arm length increases, the pumping pressure increases, so a concrete pumping pipe that can withstand higher pressure is needed.
In terms of materials, some are made of ordinary steel, while others are made of wear-resistant materials, such as 45Mn, 55Mn, etc. In terms of service life, wear-resistant materials are better. With the same thickness, wear-resistant pipes have a longer service life.
Next, we will explain to you in detail the performance characteristics and usage application scenarios of different materials.
ST52 concrete pumping pipe
ST52 concrete pumping pipe is made of high-quality seamless steel and produced through multiple processes. It has a smooth surface, no sand holes, no cracks, and is resistant to high pressure. The collar ring is made of cast iron, with a compact structure, easy disassembly and assembly, and reliable sealing performance.
Mechanical properties
This concrete pipe not only has excellent strength, but also has good plasticity and toughness.
- Tensile strength: 490MPa-630MPa
- Yield strength: ≥355MPa
- Elongation: ≥22%
Features
High strength: It has high strength and good bearing capacity, and can withstand greater pressure and external force.
Good toughness: It has good impact resistance and fatigue resistance.
Corrosion resistance: ST52 concrete pumping pipe has excellent corrosion resistance.
For ST52 pipe, the working life is ≥12000 CBM, it is suitable for low pressure pouring. However, they are cheap and are a very widely used type of concrete pumping pipe.
Welded concrete pipe
The welded concrete pumping pipe is made of Q235B material. Q235B is a common carbon structural steel, in which the carbon (C) content is generally between 0.12-0.20%, which provides basic strength for the steel. The manganese (Mn) content is around 0.30-1.2%, which can improve the toughness and strength of the steel.
Technical data
| C | Si | Mn | S | P | Cr | Ni | Cu |
| 0.12~0.2% | ≤0.35% | ≤1.2% | ≤0.045% | ≤0.045% | ≤0.3% | ≤0.3% | ≤0.3% |
When purchasing Q235 high-frequency straight seam welded pipes, you should comprehensively consider the material, weld quality, wall thickness and size to ensure that you purchase products that meet your requirements and are economical.
Welded concrete pumping pipe is cost-effective and suitable for low-pressure concrete pouring. Its working life is 8000 cbm. When using, be sure to avoid pipe blockage to prevent the risk of pipe explosion and safety accidents.
We could supply all size of welded pipe for Putzmeister, Schwing, Zoomlion, Sany, XCMG, CIFA equipment. For more information, please contact us directly.
Hardened concrete pumping pipe
The material of the hardened concrete pumping pipe is 55MN2, and the quenching depth is 2.5mm. After quenching, the inner wall forms a wear-resistant layer with a hardness of ≥HRC60.
In the process of pumping concrete, the wear of the concrete pipe is a very important indicator. The wear resistance of the concrete pumping pipe material can affect the pumping efficiency, maintenance cost and service life of the concrete pump equipment.
Technical data
| C | Si | Mn | S | P | Cr | Ni | Cu |
| 0.52~0.6% | 0.17~0.37% | 0.5~0.8% | ≤0.035% | ≤0.035% | ≤0.25% | ≤0.30% | ≤0.25% |
When selecting concrete pipe, it is necessary to consider the properties of the pumped concrete, such as the viscosity of the concrete, the sand ratio, etc. For concrete with poor fluidity, it is recommended to choose hardened pipe tube.
The working life of hardened pipe is over 30000 CBM & the flange collar is wear resistance layer, it is good using as for boom pipe. By adjusting the wall thickness, the wear resistance and service life of the concrete pumping pipe can be increased.
Twinwall layer concrete pipe
Twinwall concrete pumping pipe is made of double layer, outer is excellence Q235 steel, and the inner is wear resistance NM600-1. MN content is the key, it not only improves the hardness and strength of steel, but also significantly enhances its wear resistance and impact resistance. NM600-1 pipe has excellent strength and hardness, and heat resistance and corrosion resistance.
Technical data
C significantly reduces the critical cooling rate, improves the hardenability of steel, plays a role in solid solution strengthening, and improves the strength of steel pipes. Cr combines with carbon to form chromium-carbon compounds, which are characterized by fine and uniform distribution, so they have higher resistance, strength and hardness.
| C | Si | Mn | S | P | Cr | Ni | Cu |
| ≤0.45% | ≤0.70% | ≤1.9% | ≤0.02% | ≤0.02% | ≤0.1.5% | ≤0.90% | ≤0.60% |
Mechanical properties
| Tensile strength σb (MPa) | Yield strength σs (MPa) | Elongation δ5 (%) |
| ≥645 | ≥380 | ≥13 |
Twinwall concrete pipe can be used for 50,000 cubic meters. Due to its excellent working life and wear resistance, twinwall layer pipe is also suitable for use as boom pipe and deck pipe.
Concrete pumping boom pipe
The boom pipe is the conveying pipe of the concrete pumping truck. It needs to withstand strong pressure and high-strength impact force. Hardened pipe & double twinwall layer pipe are often used.
Hardened pipes are made of manganese steel and processed by quenching, carburizing and other processes. They have high hardness and strong wear resistance. Twinwall pipes use Q235 steel on the outer wall and quenched wear-resistant pipes on the inner wall. The service life of hardened pipe and double layer pipe is significantly better than that of ordinary concrete pumping pipe.
Choosing standard
Concrete pump trucks below 40 meters: hardened pipes are recommended.
Concrete pump trucks above 40 meters: twinwall pipes are recommended.
The working life of pipe can be increased by increasing the wall thickness,
The boom pipe has a complex structural design, it is consists of multiple straight pipes and bend elbows.
Nowadays, the most boom pipe use DN125 size, and the flange adopts a wear-resistant sleeve with a hardness of ≥HRC60.
Concrete pumping deck pipe
Concrete pumping deck pipe is a straight pipeline system, which is composed of multiple straight pipes and is usually used in longer conveying pipelines. The structure design of the deck pipe is simple and easy to install.
The platform deck pipe is mostly using twinwall layer pipe, and the flanges at both ends are made of wear-resistant sleeves.
The deck pipe is made of high-strength wear-resistant material and has excellent wear layer. Under the long-term erosion of cement slurry abrasive medium, the concrete pumping deck pipe can maintain a good surface finish and reduce the pipe damage and blockage caused by wear.
The deck pipes and the boom pipe tubes are different in structure and usage, but they can be used interchangeably. In terms of pipeline design, both deck pipe and the boom tube need to meet certain specifications and standards, such as pipeline diameter, wall thickness, material, etc. Therefore, if the deck pipe and the boom pipe are the same in these aspects, they can be used interchangeably.
Learning more information, please refer to the twinwall pipe for technical parameters.
Collar flange of concrete pumping pipe
Flanges play a very important accessories in concrete pipe system. Concrete pumping clamps are used to tightly connect two flanges to achieve a stable connection of the pipeline.
Due to the design patent protection of different companies, the welding flanges of concrete pumping pipes will be different. The materials of these pipes are generally the same, but the flange connections are different.
SK collar pipe is common tube, it is suitable for all concrete pumping equipment.
ZX collar pipe is suitable for Putzmeister concrete pump.
MF collar pipe is suitable for Schwing concrete pump.
HD collar pipe is mostly application for spray painting machinery.
For hardened pipe and twinwall pipe, wear sleeve flange is necessary for longer working life.
In order to match different flange connections, corresponding concrete clamps and sealing rings are designed. With the mergers and acquisitions of concrete pump companies, many flanges can be used commonly, which is a benefit to consumers and reduces procurement costs. For more information, please contact us.
Common and special concrete pumping pipe
Concrete pumping pipe system is composed of straight pipes of different lengths and connection flange, and different of elbow bend, including extended bends. Among them, the 3 meter concrete pipes are universal common pump pipes, they can be used in different boom lengths. In addition, there are some concrete pipes & eblow with non-standard lengths, angles, and radius, which we call non-standard pipes.
When designing a concrete pump, the boom is designed first, and then different lengths of straight pipes are designed according to the length of the boom. Therefore, the size of the straight pipe will be different for concrete pump with different pipe lengths. Zoomlion's concrete pumping pipe models are the most complex. Two pump trucks with the same model and length may have different lengths of non-standard pipes.
The most common widely used type is the DN125 pipe, which can be divided into high-pressure pipe and low-pressure pipe. The outer diameter is Φ133 for low-pressure concrete pumping pipe, while The outer diameter is Φ140 for high-pressure concrete pumping pipe.
Therefore, when purchasing a concrete pumping pipe, you must first confirm the actual length of the straight tube and the actual angle and radius of the bent tube, otherwise the concrete pipe you purchased cannot be installed.
Genuine and aftermarket of concrete pumping pipe
We need to understand a reality: almost no concrete pumping manufacturer can make all the spare parts by itself. There are hundreds of spare parts on a concrete pump truck, many of which are outsourced to professional suppliers.
The core difference between original genuine and aftermarket concrete pumping pipe lies in production source, quality, adaptability and price. The original genuine pipe is produced by the supplier designated by the concrete pumping host manufacturer. Because it is supervised by the host manufacturer, the quality is more stable.
The aftermarket concrete pipe is produced by other pipe manufacturers. The price is cheaper than the genuine factory pipe. Of course, with technological innovation and material reform, many aftermarket concrete pumping pipe tube also have very high quality.
If you only care about quality, it is best to choose the genuine pipe tube. Moreover, the original genuine pipe has been tested by the host manufacturer for a long time, its durability and matching will be better.
Also, we need to look at the manufacturer of the steel, the product's qualification certificate and the company's related technical support to ensure that the purchased products have stable quality.
Conclusion
Welded seam pipe, hardened pipes and double twinwall pipe have their own feature characteristics and are suitable for different application scenarios. When choosing a suitable steel pipe for a concrete pump, you must first consider the performance and cost of the steel pipe based on factors such as the working environment, pipe load capacity, and transportation distance.
Reasonable selection of concrete pumping pipe can not only ensure the safety and stability of the pipeline system, but also improve project efficiency and reduce maintenance costs. Therefore, it is necessary to understand the advantages and disadvantages of each concrete pumping pipe and make a reasonable choice.
Last, try to buy concrete pumping pipes and clamps of the same brand as much as possible. Because the raw materials of products from different brands may be different, it will have adverse factors on the welding of pipes and fittings, and may cause danger at the welding point during long-term use. The selection of concrete pumping pipes is crucial to operate safety, so it is important to reasonably grasp their quality and technical parameters.
As concrete pump parts specialist supplier, we could provide one stop shop service for your concrete pumping pipe system. Please call us if you have purchase plan.