Product description:

Precision seamless pipe is a type of steel pipe formed by punching through round steel, with no welds on the surface. According to the production method, seamless steel pipes are divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, and hot-expanded seamless steel pipes. Seamless steel pipes are classified into two types based on their cross-sectional shape: circular and special-shaped.

Precision Cold Rolled Seamless Tube is a high-quality steel tube produced through advanced cold rolling processes to achieve exceptional dimensional accuracy, smooth surface finish, and superior mechanical properties. It is widely used in industries such as automotive manufacturing, hydraulic systems, mechanical engineering, construction machinery, and energy equipment, where precision, reliability, and performance are critical.

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Manufacturing Process

The production of precision cold rolled seamless tubes begins with high-quality hot rolled seamless steel pipes, which are then subjected to a series of cold rolling and heat treatment operations. During cold rolling, the tube is processed at room temperature using precision rollers to reduce wall thickness and improve dimensional tolerances. This process enhances the tube’s strength, hardness, and surface quality. Subsequent annealing and straightening treatments relieve internal stress and ensure excellent roundness and uniformity. The result is a seamless tube with tight tolerances in outer diameter, inner diameter, and wall thickness.

Material Grades

Precision cold rolled seamless tubes are available in a wide range of material grades, including carbon steel, alloy steel, and stainless steel. Common grades include 10#, 20#, 45#, 16Mn, ST52, E355, and AISI 1020–1045. The choice of material depends on the intended application—carbon steel grades are ideal for general mechanical use, while alloy and stainless steels are preferred for high-pressure, corrosion-resistant, or high-temperature environments.

Key Features

High dimensional accuracy: Tolerances as tight as ±0.05 mm for outer diameter.

Smooth inner and outer surfaces: Ideal for precision assembly and fluid flow applications.

Excellent mechanical properties: High tensile strength, yield strength, and impact resistance.

Good machinability: Suitable for precision cutting, bending, and welding.

Enhanced surface quality: Free from oxidation scale or defects, with bright and clean finish.

Applications:

The application scope of seamless steel pipes is very wide, including structures, fluid transportation, low to medium pressure boilers, high-pressure boilers, fertilizer equipment, petroleum cracking, geological drilling, diamond core drilling, petroleum drilling, ships, automotive half-shaft sleeves, diesel engines, etc. The use of seamless steel pipes will ensure no leakage problems, guarantee the usage effect, and improve material utilization. It can be seen that the application of seamless steel pipes mainly covers three major fields. The first is the construction field, which can be used for underground pipeline transportation, including extracting groundwater during construction. The second is the processing field, which can be used for mechanical processing, bearing sleeves, etc. The third is the electrical field, including gas pipelines and fluid pipelines for hydropower generation.

Applications:

Precision cold rolled seamless tubes are extensively used in:

Automotive industry: Drive shafts, steering systems, shock absorber cylinders, and fuel injection lines.

Hydraulic and pneumatic systems: hydraulic cylinders, precision pistons, and control valves.

Mechanical engineering: Machine tool structures, roller bearings, and industrial automation equipment.

Energy sector: Oil and gas transmission, heat exchangers, and boiler tubes.

Construction machinery: High-strength structural tubing for cranes, loaders, and excavators.

Advantages Over Hot Rolled Tubes

Compared with traditional hot rolled seamless pipes, cold rolled tubes have finer microstructure, higher strength, and better surface quality. The cold working process ensures precise tolerances and improved concentricity, making them ideal for components that require tight dimensional control and smooth surfaces. This leads to better sealing performance, reduced machining costs, and longer service life of the final product.

Company profile:

Since its establishment in 2014, Wuxi Hengxin Zhicheng Co., Ltd. has rapidly grown into a leading enterprise in the steel manufacturing industry. We focus on the research, production and sales of seamless steel pipes, special-shaped steel pipes and hydraulic cylinders, and are committed to providing customers with high-quality, customizable products that fully meet diverse application needs.

Our products are exported to global markets such as the Middle East, South America, Africa, and Southeast Asia, and are highly trusted by large purchasers and customers in the steel industry. We always prioritize quality, reliability and customer service, and attach great importance to establishing long-term and stable cooperative relationships with customers. We provide each customer with tailor-made solutions.

We continuously promote technological innovation and improve service capabilities and production efficiency. Through an efficient online platform, you can browse our best-selling products at any time and communicate with the sales and support teams in real time to conveniently obtain the information you need. We sincerely invite partners from all countries to visit, exchange and provide guidance, and jointly explore more possible cooperation opportunities!

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Packaging and Transportation:

【Package standard】

We use steel bands to tightly package the products into hexagonal bundles. The structure is stable and not prone to deformation. Each bundle is equipped with two high-strength nylon straps to ensure the safety and convenience of the lifting operation.

To meet various maritime transportation needs, we offer a range of customized packaging options, including full coverage with oilcloth, moisture-proof wooden boxes, and high-strength protective frame packaging, to ensure the maximum safety of goods during transportation.

【Guarantee for transportation】

We offer 20-foot and 40-foot standard container transportation services. Each container can carry up to 25 tons of goods and we can accept trial orders with a minimum of 5 tons. This allows for flexible adaptation to your purchasing scale. All packaging complies with maritime shipping standards to ensure that the goods are delivered to the destination efficiently and safely.

Why us?

We focus on the research, development, production and sales of seamless steel pipes, Special-shaped steel pipes and hydraulic cylinders. We have a complete production chain and an advanced equipment system, including piercing machines, cold drawing machines, hot rolling machines, high-precision flaw detection and testing equipment. The company has passed multiple authoritative certifications such as ISO9001, API, SGS, CCS, DNV, ABS, CE, RoHS, etc., ensuring that each product complies with international standards. We are committed to providing customers with high-quality, customizable solutions to meet diverse application needs.

Relying on our own built processing base and modern workshops, combined with multiple branches and storage centers across the country, we have achieved sufficient inventory and efficient logistics coordination, significantly shortening the delivery cycle and ensuring the rapid delivery of orders.

We have established a complete service and support system. After the order is signed, the professional after-sales team can provide timely and safe on-site guidance and technical support to ensure that customers are at ease throughout the process from procurement to use.

FAQ：

1. Do you support customized design and production?

Sure. We have a professional engineering team that can conduct customized design and production with special sizes, control systems or OEM according to your requirements.

2. How fast can you deliver?

In stock sizes, it takes 3-5 days. For customized sizes, it takes 30-35 days.

3. What payment methods do you support?

We support TT payment. Generally, 30% to 50% of the payment is made in advance, and the remaining amount is paid before shipment.

4. Can you provide material certification (MTC)?

Yes, we will provide MTC to you after production is completed to ensure that the material quality meets the standards.

5. What is the minimum order quantity?

Generally, we accept trial orders. The minimum order quantity is 1-3 tons, which can be determined according to different products.