Product Description

Product information:
 

 

Seamless Steel Tube, Hydraulic Cylinder Tube for Gas Cylinder, 37mn 30CrMo, GB 18248,

PART I: PRODUCT INTRODUCTION
What is a high pressure cylinder tube?

High pressure gas cylinder tube is a kind of seamless steel tube, commonly known as seamless steel tube for gas cylinders, widely used in all kinds of high pressure vessel tanks, as well as industrial gas cylinders, fire cylinders, vehicle CNG cylinders, vehicle CZPT winding cylinders and other gas cylinders manufacturing.

What are the manufacturing processes of high-pressure gas cylinder tubes?

High pressure gas cylinder tube can be divided into hot rolled and cold drawn. Hot rolled gas cylinder tube is mainly used to manufacture all kinds of pressure vessels, cylinders and other products. Cold drawn gas cylinder seamless steel tube is mainly used to manufacture vehicle-mounted gas cylinders requiring light weight and thin wall thickness and steel liner circular winding vehicle-used CNG cylinders.

What are the production inspection and testing standards for high-pressure gas cylinder tubes?

The domestic standards are GB/T 18248 and GB/T 28884, and the corresponding foreign standards are JIS G 3429, ISO 11120, ASTM 372, etc

What are the main materials of high pressure cylinder tube at home and abroad?

The main materials of gas cylinder tube in China are 37Mn, 34CrMo4, 35CrMo, 30CrMnSiA, 30CrMo, 34Mn2V,

The main foreign standard material of gas cylinder tube is: 38Mn6, 30CrMo4, Group , 4130X, Grade C, Grade E, STH11, STH12, STH21, STH22

Characteristics and advantages of high-pressure gas cylinder tubes manufactured by our company: Raw materials provided by HengGang high-quality special steel and its high purity of steel, cold drawn cylinder tube, the tube body geometry size and the inner and outer surface quality, its wall thickness uniformity and high precision, light quality, productivity and yield is quite high, also facilitate cylinder manufactory convergent, and I produce cylinder pipe diameter can be done in 325 ~ 430, the minimum wall thickness of 3.5 mm, As a conventional specification of gas cylinders, the delivery time is faster.

1. Description: Honing is a kind of machining technology. Through honing head, the inner hole of cold drawn pipe is processed by reciprocating high-speed grinding technology, so that the inner hole can meet the requirements of tolerance size and surface roughness that we need.
Honed tube is a kind of smooth bore steel tube used to manufacture hydraulic cylinder barrels that is the core part of a piece of hydraulic cylinder. 
2. Commodity:  St52.4 Honed Hydraulic Cylinder Precision Pipe
3. Size range: Inside diameter: 25mm -500mm; Wall thickness: 2-50mm
4. Available steel grade: 

SAE/AISI:	38Mn6,30CrMo4,Group ,4130X,Grade C,Grade E,STH11,STH12,STH21,STH22
DIN:	ST52, ST52.3, ST52.4
EN:	E355, C45E, 25CrMo4, 42CrMo4, CK45, S45C, E410, E470
GB:	37Mn,34CrMo4,35CrMo,30CrMnSiA,30CrMo,34Mn2V,

5. Manufacture method: Cold rolled, hydraulic cold drawn, hot rolled+deep hole boring
6. Delivery condition: 

BK	BKW	BKS	GBK	NBK	Q+T
+C	+LC	+SR	+A	+N
Cold rolled	Cold drawn	Stress relieved	Annealed	Normalized	Quenched+Tempered

7. Bore treatment: Honing, skiving&roller burnishing
8. Bore roughness control: Ra0.25um max or Ra0, 35um max for honed tubes, Ra0.25um max for skived&roller burnished tubes. 
9. End finish: Plain ends with square cuts, free of burrs for honed tubes. Little bevelled ends for skived&roller burnished tubes. 
10. Standard export packing: In bundles tied with steel strips. Internal & external oil coating. Plastic caps on both ends. External packing by PVC bags and knit bags. 
11. Customized packing and marking can be provided upon request. 
12. H8 tolerance: 

ID range	Tolerance	ID range	Tolerance
18< d ≤30	+0/+0.033	180< d ≤250	+0/+0.072
30< d ≤50	+0/+0.039	250< d ≤300	+0/+0.081
50< d ≤80	+0/+0.046	300< d ≤315	+0/+0.081
80< d ≤120	+0/+0.054	315< d ≤400	+0/+0.089
120< d ≤180	+0/+0.063	400< d ≤500	+0/+0.097

13. Difference between honed tube and skived & roller burnished tube: In hydraulic cylinder industry, there are 2 solutions for bore treatment: Honing, and skiving&roller burnishing. Honing or skiving&roller burnishing leads to different internal surface image, but both ensure good roughness. 

Product Show:

Transportation and Package:

1.Black varnish painted or oil painted anti-corrosion oil ,2PE, 3PE on the surface

2.Plain,squire cut or bevelled end by caps

3.In hexagon or triangle bundle with steel strips

4.Marking: As per customer's requirment

Trade Terms:FOB/CIF/CFR

 Payment Terms:L/C,T/T, Western Union.

 Loading Port:XinGang ZheJiang , China

 Delivery: Within 15-20days after we receive deposit or L/C at sight

Our Company:

ZheJiang CZPT Steel Co.,Ltd. is located in Shuang Gang industrial zone of Xihu (West Lake) Dis. district ,ZheJiang .we have been engaged in export of steel pipes for about 10 years. Now, We sell 160,000 tons steel pipes per year, including the steel pipes for the high, medium and low pressure boilers, shipping, transporting liquid products, the petroleum cracking process, the fertilizer facilities, the structure ,the hollow sucker rod , oil well casing and drill pipe,galvanized steel pipe and some stainless steel. Our products are very popular in the overseas market.we enjoy the good reputation with high qulity and better service.

Warmly welcome customers home and abroad to visit our company and give us valuable suggestions. We would like to have long
 term cooperation with customers from all over the world on the basis of mutual prosperity and development!

Customers visits  and Exhibition:

Why choose us?
 
High Quality

We have established quality management system according to ISO9001:2008 and carry out the total quality management.

Competitive Price

We can offer you reasonble price as your requirement.

Fast Delivery

we have large stocks,and can do OEM very fast as your requirements.

Good Service

Timely reply! Perfect packing! Friendly atitude! Do our best to meet your demand!

Various  Products

Carbon seamless steel pipe,Oil Casing ,Drill Steel Pipe,Galvanized Steel Pipe,Carbon weled steel pipe,Stainless Steel productions,...... Also we can do OEM.

 

Choosing the Right Ball Bearing for Your Application

When choosing a Ball Bearing, there are several things to consider. These factors include: the size, lubricant type, presence of corrosive agents, stray electrical currents, and more. It can be challenging to choose the right type, size, and type of ball bearing for your application. You should also carefully calculate the loads to determine the right size. Here are some tips for choosing the right Ball Bearing for your application.

Single-row

The single-row ball bearing is 1 of the most popular types of bearings. The inner and outer ring are designed with raceway grooves that are shaped slightly larger than the balls. This type of bearing has a low torque and can handle high-speed applications with minimal power loss. The radial dimensions of single-row ball bearings also vary, so it is possible to find 1 that fits your specific application. Besides the above-mentioned advantages, single-row ball bearings are also available with varying grease levels and are widely applicable to applications where the space is limited.
Single-row ball bearings are also called angular-contact ball bearings. Because of their single-row design, they are not separable and can accommodate a high-speed, heavy-duty application. Single-row angular-contact ball bearings can only handle axial load in 1 direction, and they must be installed in pairs for pure radial loads. Single-row ball bearings are a popular type of rolling bearings and can be used for a wide range of applications.

Self-aligning

The self-aligning ball bearing was invented by Sven Wingquist, a plant engineer for a textile company in Sweden. While he was responsible for making production as efficient as possible, he soon realized that the machinery he had in place wasn't working as efficiently as it could. Although ball bearings are great for reducing friction, they were not flexible enough to compensate for misalignments in the machine.
Self-aligning ball bearings have 2 rows of balls and a common sphered raceway. The inner ring is curved and combines the 2 rows of balls into 1 cage. These bearings can tolerate shaft misalignment and compensate for static angular defects. They can be used in simple woodworking machinery, ventilators, and conveying equipment. They are often the preferred choice for applications where shaft alignment is an issue.

Ceramic

A Ceramic ball bearing is a type of high-performance bearing that is available in both full-ceramic and hybrid forms. The main differences between ceramic and steel ball bearings are their construction, lubrication, and mobility. High-quality ceramic ball bearings are durable, and they are ideal for corrosive and high-temperature applications. The material used to create these bearings helps prevent electrolytic corrosion. They are also ideal for reducing the friction and lubrication requirements.
Ceramic balls are harder and less brittle than steel balls, which gives them a higher degree of rigidity. Ceramics also have a higher hardness, with a hardness of Rc75-80 compared to Rc58-64 for steel balls. Their high compressive strength is approximately 5 to 7 times greater than steel. In addition, they have a very low coefficient of friction, which allows them to spin at higher speeds and with less friction. This increases their lifespan and durability, and decreases the energy needed to turn cranks.

Steel

Unlike traditional bearings, steel balls have a relatively uniform hardness. Carbon steel, for instance, is 2.1% carbon by weight. According to the American Iron and Steel Institute, copper content must be no more than 0.40% and manganese content should not be more than 1.65 g/cm3. After carbonizing, steel balls undergo a process called sizing, which improves their roundness geometry and hardness.
The main differences between steel ball bearings and ceramic ball bearings can be traced to their different materials. Ceramic balls are made from zirconium dioxide or silicon nitride. Silicon nitride is harder than steel and resists shocks. The result is increased speed and longer service life. Polyoxymethylene acetal (PMMA) bearing balls are known for their stiffness, strength, and tolerance, but are not as common as steel ball bearings.

Plastic

The most popular types of plastic ball bearings are made of polypropylene or PTFE. These bearings are used in applications requiring higher chemical resistance. Polypropylene is a structural polymer that offers excellent physical and chemical properties, including excellent resistance to organic solvents and degreasing agents. Its lightweight, low moisture absorption rate, and good heat resistance make it an excellent choice for high-temperature applications. However, plastic bearings are not without their drawbacks, especially when operating at very high temperatures or under heavy loads.
Compared to metal bearings, plastic ball-bearings do not require lubrication. They also are highly corrosion-resistant, making them an excellent choice for wash-down applications. They are also post-, autoclave-, and gamma sterilizable. Many conventional steel ball-bearings cannot handle the high temperatures of food processing or swimming pools. In addition to high temperature applications, plastic ball bearings are resistant to chemicals, including chlorine.

Glass

Plastic sliding bearings are molded bearings made of engineering plastic. With self-lubricating modification technology, these bearings can be produced by injection molding of plastic beads. They are widely used in various industries such as office equipment, fitness and automotive equipment. In addition to plastic bearings, glass balls are used in a variety of other applications, including medical equipment. Glass ball bearings have excellent corrosion resistance, excellent mechanical properties, and are electrically insulators.
Plastic ball bearings are made of all-plastic races and cages. These bearings are suitable for applications that are exposed to acids and alkalis. Because they are cheaper than glass balls, plastic ball bearings are popular in chemical-exposed environments. Stainless steel balls are also resistant to heat and corrosion. But the main disadvantage of plastic ball bearings is that they are not as strong as glass balls. So, if weight and noise is your main concern, consider using plastic balls instead.

Miniature

The global miniature ball bearing market is expected to reach US$ 2.39 Billion by 2027, at a CAGR of 7.2%. Growth in the region is attributed to technological advancement and government initiatives. Countries such as India and China are attracting FDIs and emphasizing the establishment of a global manufacturing hub. This is boosting the market for miniature ball bearings. The miniscule ball bearings are manufactured in small quantities and are very small.
Some manufacturers produce miniature ball bearings in different materials and designs. Chrome steel is the most popular material for miniature ball bearings because of its high load capacity, low noise properties, and lower cost. But the cost of stainless steel miniature bearings is low, since the amount of steel used is minimal. Stainless steel miniature bearings are the smallest in size. Therefore, you can choose stainless steel mini ball bearings for high-speed applications.

Angular-contact

Angular-contact ball bearings have 3 components: a cage, inner ring, and balls. Angular-contact ball bearings can support high axial and radial loads. Various design and manufacturing attributes make angular-contact ball bearings suitable for a variety of applications. Some features of this bearing type include a special lubricant, different cage materials, and different coatings.
The size of an angular-contact ball bearing is determined by the design units: outer ring width, axial load, and radial load. Depending on the type of application, an angular-contact ball bearing may be manufactured in double-row, triple-row, or quadruple-row configurations. Angular contact ball bearings can be classified according to their design units, which range from metric to imperial. A higher ABEC number means tighter tolerances. To determine the tolerance equivalent of a particular bearing, consult a standard Angular-contact ball bearing table.
Angular-contact ball bearings feature high and low-shoulder configurations. They have two-dimensional races that accommodate axial and radial loads. They are available in self-retaining units with solid inner and outer rings, and ball and cage assemblies. Cages made of cast and wrought brass are the most popular, but lightweight phenolic cages are also available. The latter is a better choice because it doesn't absorb oil and has lower rolling friction.

Materials

When it comes to the construction of a ball bearing, high-quality raw materials are a crucial component. These materials not only affect the overall quality of a ball bearing, but also influence the cost. That's why you should pay close attention to raw material quality. In addition to that, raw materials should be tested several times before the manufacturing process to ensure quality. Read on for some information about the different types of materials used to make ball bearings.
Steel is the most common material for ball bearings. Most ball bearings contain stainless steel balls, which are remarkably corrosion-resistant. They are also resistant to saltwater and alkalis. However, stainless steel balls are heavier than plastic ones, and they are also magnetic, which may be a drawback in some applications. If you're looking for a metal-free option, glass balls are the way to go. They're sturdy, lightweight, and resistant to a wide range of chemicals.