Precision Steel Pipe Cold Drawn Pipe E355 (St52) Honed Tube for Hydraulic Cylinder

• Customization: Available
• Certification: GB8713 GB/T 3639 DIN2391 En10305 Astma519
• Pressure: 300-400 Bar
• Model NO.: Customize
• Work Temperature: -30~+80 Degree Centigrade
• Material: 20#, 45#,16mn(Q355b,S355),25mn,27simn,St45,E355
• Warranty: 14 Months From Production Time
• Color: as Customer′s Requirement
• Transport Package: as Customer′s Requirement
• Trademark: WTJX
• Origin: Shandong, China
• HS Code: 8412210090
• Production Capacity: 10, 000tons / Year

Product Description

Product Description

Our company mainly produces hydraulic cylinders, high-precision cold-drawn pipes, and inner-hole boring and rolling steel pipes. Our products are widely used in hydraulic cylinders, engineering machinery, oil pipelines, textile machinery, gas cylinders, etc. The company is well-equipped and has excellent technology. It has 3 sets of cold-drawn units with drawing forces of 150T, 250T, and 600T, which can meet the drawing processing of pipe diameters ranging from φ45-630mm.

Specification


Manufacturing Technique of Cold-Drawn Seamless Tubes

Cold drawing is a precision manufacturing process used to create seamless pipes and tubes. It involves several stages, each of which plays a crucial role in producing tubes with the desired properties.

Here is a step-by-step breakdown of the manufacturing process:

1. Billet Preparation:

• The process begins with the selection of high-quality raw materials, typically steel or alloy steel billets.
• The billets are inspected for defects and then cut to the desired length.

2. Piercing:

• The prepared billet is heated to a suitable temperature to facilitate piercing.
• A piercing rod with a pointed end is used to create a hole through the center of the billet. This initial hole is called a "bloom."

3. Elongation:

• After piercing, the bloom is elongated to reduce its diameter and increase its length.
• This process is achieved through a series of rolling operations, which involve passing the bloom through multiple sets of rolls.

4. Cold Drawing:

• The elongated tube, known as a "hollow," is then cold drawn through a die to further reduce its diameter.
• This process is performed at room temperature, ensuring that the tube maintains its seamless construction.

5. Annealing:

• To relieve any stresses induced during cold drawing and improve the tube's mechanical properties, it undergoes an annealing process.
• The tube is heated to a specific temperature and then slowly cooled.

6. Cutting and Finishing:

• After annealing, the cold-drawn seamless tube is cut to the desired length.
• The ends of the tube are finished to meet specific requirements, such as chamfering or threading.

7. Quality Control:

• Stringent quality control measures are applied at every stage of production to ensure the final product meets industry standards and customer specifications.

8. Surface Treatment:

• Depending on the application, the tube may undergo surface treatments such as polishing, coating, or plating for added protection and functionality.

9. Inspection and Testing:

• The finished cold-drawn seamless tubes undergo comprehensive inspection and testing, including dimensional checks, non-destructive testing, and material analysis.

10. Packaging and Shipping:

• Finally, the tubes are carefully packaged to prevent damage during transportation and shipped to customers, ready for use in various applications.

Company Profile


Shandong Wantong Hydraulic Co., Ltd. (Stock Code: 830839), founded in June 2004, is a domestic medium and high pressure hydraulic cylinder supplier integrating R&D, production, sales and service. Its main products include three series of hydraulic cylinders for dump trucks, hydraulic cylinders for mechanical equipment and hydropneumatic springs.

The company's management team and main technical personnel are stable. We has constantly innovated from the actual needs of customers, has gradually positioned the medium and high-end market, and has provided high-quality products for customers in automobile, coal mine, petroleum, engineering machinery and other industries with high-quality service.

Production Equipment 

There is one pickling, phosphating, and saponification production line, which has acid mist treatment in accordance with environmental protection requirements and can meet the processing of 200 tons of steel pipes per shift. At the same time, it is equipped with 2 heat treatment furnaces and 2 high-precision multi-roller straightening machines, with a straightening accuracy of 0.3mm/M. There should be multiple inner-hole scraping and rolling equipment to meet the boring and rolling processing within a diameter of 40-630mm and a length of 6000mm.

Quality Inspection

Our company has abundant technical force and perfect testing means. By making wide technical and business cooperation with many related enterprises, universities, colleges and institutes both at home and abroad, and employing senior engineers and software engineers, we have greatly strengthened and improved our designing, processing, and testing abilities.

Certificate And Our Customers


Domestic Marketing Locations
The company's products are widely sold in Shandong, Shaanxi, Shanxi, Henan, Hebei, Hubei, Beijing, Inner Mongolia, Gansu and other more than 20 provinces, municipalities and autonomous regions.

Foreign Marketing Locations
Our products are exported to the United States, Canada, Mexico, Russia, South Africa, Indonesia and other Europe, America, South America, Southeast Asia.
 

FAQ

Q1: Are you a manufacture or a trade company?
A: Manufacture, we are the leader manufacturer of hydraulic industry in China with over 20 years' experience and technology accumulation. With strong technical team we could solve any annoyance of you.
 
Q2: Do you have quality control system?
A: Yes, The quality management system introduced is: ISO/TS 16949:2009-certified by NQA and IATF cert.
 
Q3: How can I get a booklet and buy a cylinder from you?
A: Very easy! Just leave me a message or email or call me directly, let me know you are interesting in our products. I will talk with you for the details soon!
 
Q4: Can you tell me the price for the cylinder?
A: 1. Please advice the drawing with technical requirement.
2. Please advice the model No. after you check our booklet.
3. Please advice the tipping capacity, number of stages, closed length, mounting type and size.
4. Please also help advice the quantities, this is very important.
 
Q5: Do your products come with a warranty?
A: Yes, we have 14 months from production time. In this time, if the quality problem we will free repair for you.
 
Q6: What about the quality feedback of your products?
A: WE HAVE NEVER RECEIVED EVEN ONCE QUALITY COMPLAINT FOR MANY YEARS OF INTERNATIONAL BUSINESS.
 
Q7: Can you help me to install or recommend what kind of hydraulic cylinder or power pack should I use for specific machine?
A: Yes, we have 74 experienced engineers who are always ready to help you. If you do not know what kind of hydraulic cylinders should be used in your machine, please just contact us, our engineers will design the exact products match your need.
 
Q8: What is your main payment term?
A: T/T, L/C, Western Union, Paypal. Either is available.