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| Customization: | Available |
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| Certification: | ISO9001 |
| Pressure: | with High and Low Pressure Switch |
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| Type: | High-precision cold-drawn seamless tube |
| Standard: | GB/T3639-2018, GB/T 5777-2008,the technology agreement |
| Material steel: | 45#, 16Mn(Q345B), 25Mn, 27SiMn, SY720, ZNP460 |
| Internal diameter Tolerance: | H8, H9,H10 |
| Straightness rate/roundness rate/mechanical performance : | As agreement |
| Chrome-plated | Area and thickness as request |
| Size: | 100mm-500mm |
| Shape: | Round, square |
| Package: | As request |
| Usage: | 1. For hydraulic cylinder's outside cylinder and piston rod; 2. For transportation of natural gas, oil, kerosene, etc to avoid leakage; 3. For making parts of some machines such as the drive shaft of an automobile or the drill pipe of oil and bicycle frames; 4. For some large machinery such as boiler heating supply pipe; 5. For the storage of liquefied natural gas such as taxi trunk cylinders. |

We have a 400-ton hydraulic cold drawn unit, mainly produce cold drawn pipes,honed pipes and skiving pipes of various specifications and materials as round (diameter 100mm to 500mm) or special-shaped ones

Changsha Dalishen Hydraulic Engineering Co., Ltd., founded in 2007, is a Hi-tech enterprise which is mainly engaged in developing, producing and marketing of precision seamless steel pipe, pipe for hydraulic cylinder, concrete delivery cylinder, hydraulic cylinder, concrete pumping system assembly and cylinder fittings. CSDLS is the first hydraulic cold-drawn seamless steel pipe manufacturer in South China and involved in a number of China's national standards' formulation of the industry. We have 13 effective utility patents at present. With our powerful RD and machining equipment, we can also process as your drawing. With an area of 29000 square meters factory, we can provide quite production lines for timely mass production. So far we have established business relationship with many famous companies such as SANY, Zoomlion, ZMJ, LiuGong and XANJER.
CSDLS is a professional hydraulic engineering company with many advanced equipments in our factory. There are professional equipments for manufacturing cold-drawn tubes to ensure the excellent quality of the tubes.
| Our Advantages / Why choose us |
| 1. We have our own factory with 29,000 square meters in the hometown of heavy industry, |
| Changsha City, Hunan Province. |
| 2. We have 18 years experience in the field with powerful RD and machining equipment. |
| 3. We have 13 effective utility patents and 80 sets of production and test equipment. |
| 4.We focus on cylinder and accept OEM and ODM processing. |
| 5. We follow ISO9001 and have established long-term co-operation with SANY, Zoomlion, |
| ZMJ and LiuGong. |
| FAQ |
| Q1. Are you a factory or a trading company? |
| We are a factory focusing on hydraulic engineering. |
| Q2. Do you have your own brand? |
| Yes, we have. Our brand is CSDLS. |
| Q3. Do you accept sample orders? |
| Yes, we do. |
| Q4. What about your warranty? |
| One year since delivery. |
| Q5. What are your payment terms? |
| T/T, L/C,OA |