Archive for category: company news

Seamless steel pipe insulation work is more common in the refrigeration system in a project, doing a good job of this work can better protect the normal work of refrigeration equipment, and improve the energy efficiency of the system. So what details should be noted in the refrigeration seamless steel pipe insulation project?

Seamless steel pipe insulation project preparation work includes:

1. In the material preparation Purchase insulation materials that meet the requirements, such as polyurethane insulation steel pipe, insulation elbow tee, and other pipe fittings, valves, and so on.

2. Tool preparation Need to prepare power supply, welding machine, insulation thickness measurement tools, etc..

3. Construction environment preparation, including cleaning up the construction area, to ensure that the construction site is clean and tidy, to avoid adverse effects on the insulation construction.

The seamless steel pipe insulation project includes the following steps:

1. Seamless steel pipe lifting. Need to be according to the actual situation of the site, according to the requirements of the seamless steel pipe lifting up, so that the welding workers in the welding group will be more convenient.

2. Welding of insulation steel pipe. Before welding, we should fully understand whether the pipe needs to be ultrasonic, flaw detection, etc. In the absence of ultrasonic and flaw detection welding process will be much simpler, but if it is necessary for ultrasonic or flaw detection, it is also necessary to pipe sub-arc welding priming.

In refrigeration throughout the seamless steel pipe insulation insulation project, the safety issue is crucial. Construction personnel must wear work clothes helmets and other items according to the requirements, and strictly do a good job of protective measures, according to the relevant operational specifications for implementation. And to be regularly on the state of the insulation layer and insulation layer of all-round inspection, in order to timely maintain and repair, so that the refrigeration system achieves a longer operating cycle.

Aluminum-titanium alloy profiles add alloy elements to industrial pure titanium to improve the strength of titanium. Titanium alloys can be divided into three types: titanium alloy, b titanium alloy, and a+b titanium alloy. ab titanium alloy is composed of a and b dual phases. This type of alloy has a stable structure, good high-temperature deformation performance, toughness, and plasticity. It can be quenched and aged to strengthen the alloy.

The performance characteristics of titanium alloy are mainly reflected in:

1)High specific strength. Aluminum-titanium alloy profiles have a low density (4.4kg/dm3) and are light in weight, but their specific strength is greater than ultra-high-strength steel.

2) High thermal strength. Aluminum-titanium alloy profiles have good thermal stability, and their strength is about 10 times higher than that of aluminum alloys at 300 to 500°C.

3) High chemical activity. Titanium can produce strong chemical reactions with oxygen, nitrogen, carbon monoxide, water vapor, and other substances in the air, forming TiC and TiN hardened layers on the surface.

Poor thermal conductivity. Titanium alloy has poor thermal conductivity. The thermal conductivity of titanium alloy TC4 at 200℃ is l=16.8W/m·℃, and the thermal conductivity is 0.036 cal/cm·s·℃.

Analysis of machining characteristics of aluminum-titanium alloy profiles

First of all, the thermal conductivity of titanium alloy is low, only 1/4 of steel, 1/13 of aluminum, and 1/25 of copper. Because the heat dissipation in the cutting area is slow, it is not conducive to thermal balance. During the cutting process, the heat dissipation and cooling effect are very poor, and it is easy to form high temperatures in the cutting area. After processing, the parts deform and rebound greatly, resulting in increased cutting tool torque and rapid edge wear. Durability reduced. Secondly, the thermal conductivity of titanium alloy is low, which makes the cutting heat accumulate in a small area around the cutting tool and is not easy to dissipate. The friction on the rake face increases, making it difficult to remove chips. The cutting heat is not easy to dissipate, which accelerates tool wear. Finally, titanium alloys are highly chemically active and tend to react with tool materials when processed at high temperatures, forming coatings and diffusions, resulting in phenomena such as sticking, burning, and breakage.

The selection of tool materials should meet the following requirements:

Sufficient hardness. The hardness of the tool must be much greater than the hardness of the aluminum-titanium alloy.

Sufficient strength and toughness. Since the cutting tool is subjected to large torque and cutting force when cutting aluminum-titanium alloy, it must have sufficient strength and toughness.

Sufficient wear resistance. Due to the good toughness of titanium alloy, the cutting edge must be sharp during processing, so the tool material must have sufficient wear resistance to reduce work hardening. This is an important parameter when selecting cutting tools for processing titanium alloys.

The affinity between tool materials and titanium alloys is poor. Due to the high chemical activity of aluminum-titanium alloys, it is necessary to prevent the tool material from forming an alloy with the aluminum-titanium alloys by dissolving and diffusing, causing sticking and burning of the tools.
​

What are the performance characteristics of S38815 high silica stainless steel?

S38815 stainless steel is a special high alloy stainless steel with unique properties and wide applications. In this article, we will introduce the characteristics of S38815 stainless steel and application areas.

First of all, S38815 stainless steel has excellent corrosion resistance. It can resist the corrosion of a variety of media, including acids, alkalis, chloride ions, and so on. This corrosion resistance makes it widely used in the chemical industry, marine engineering, oil extraction, and other fields. Whether in harsh environmental conditions or in high-temperature and high-pressure working environments, S38815 stainless steel can maintain its stable performance.

Secondly, S38815 stainless steel has excellent oxidation resistance. It can resist high-temperature oxidation and maintain a low rate of steel corrosion. This property makes S38815 stainless steel very useful in working environments at high temperatures. It is widely used in heat exchangers, furnaces, burners, and other fields, and can ensure the long-term reliable operation of equipment.

In addition, S38815 stainless steel has good strength and toughness. It is able to withstand high loads and impacts and maintain a low deformation rate. This makes S38815 stainless steel widely used in the manufacturing field. It is commonly used to make a variety of parts and structural assemblies, such as in aerospace, automotive, and machinery, and is able to meet the requirements of complex working environments.

In addition, S38815 stainless steel has wear resistance and heat resistance properties. It is able to maintain good mechanical properties at high temperatures and is less susceptible to heat and wear. This makes S38815 stainless steel widely used in metallurgy, coal mining, and the chemical industry. For example, in coal mining, S38815 stainless steel can withstand high temperatures and abrasive environments to ensure the reliability and life of the equipment.

To summarize, S38815 stainless steel is a unique high-alloy stainless steel with excellent corrosion resistance, oxidation resistance, strength, and toughness. It is widely used in the chemical industry, marine engineering, oil extraction, aerospace, metallurgy, coal mining, and chemical industry. With the advancement of technology, the application areas of S38815 stainless steel will continue to expand, bringing more innovation and possibilities to various industries.

Stainless steel round tube is a kind of stainless steel material hollow round pipe, widely studied and applied in building decoration design decoration, the metal processing technology industry. For general use of stainless steel material round tube, the main technical parameters are stainless steel round tube material, stainless steel round tube diameter, stainless steel round tube length, stainless steel tube wall thickness, and so on.

Stainless steel tubes can be divided into round tubes and profiled tubes according to the shape of the section. The shaped tube has a rectangular tube, rhombic tube, oval tube, hexagonal tube, octagonal tube, and various asymmetric tubes with different cross sections. The shaped tube is widely researched and applied to various structural components, tools, and mechanical design parts in enterprises. Compared with the round tube structure, the shaped tube has a greater impact on the moment of inertia and the effective modulus of the cross-section, with the advantages of bending resistance and torsion resistance.

What are the classifications of stainless steel round tubes？
Stainless steel round tubes according to use can be divided into decorative stainless steel round tubes, industrial stainless steel round tubes, sanitary stainless steel round tube

Stainless steel material round tubes according to the production technology process can be divided into seamless tubes and welded tubes. Seamless steel pipe can be divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, and extruded pipe, etc., cold-drawn, and cold-rolled is the secondary processing of steel pipe; welded pipe is divided into straight seam welded pipe and spiral welded pipe.

Stainless steel material round tubes according to different materials can be divided into 201 stainless steel or round tubes, 304 stainless steel using round tubes, 316L stainless steel round tubes, and so on.

A stainless steel round tube is how to process out？
Stainless steel welded pipe production process: raw materials – slitting – welded tube – heat treatment – straightening – straightening – end repair – pickling – water pressure test – inspection (spray printing) – packaging – shipping

Cold-drawn (rolled) seamless steel pipe: round billet→heating→piercing→heading→annealing→acid washing→oil coating (copper plating)→multiple cold-drawn (cold-rolled)→billet→heat treatment→straightening→hydraulic test (flaw detection)→marking→warehousing.
Hot rolled (extruded seamless steel pipe): round billet → heating → piercing → three-roll inclined rolling, continuous rolling or extrusion → stripping → sizing (or reduction) → cooling → billet pipe → straightening → hydrostatic test (or flaw detection) → marking → storage.

What are the characteristics of stainless steel round pipes?
From the above process design flow, it is not difficult to see: First, the enterprise products for continuous online production, the thicker the wall thickness, the greater the unit and dissolution equipment and investment risk, the lower the economy and practicality. Thinner wall thickness, its input work output ratio will carry out the corresponding ability to decline; Secondly, the product of the process research to determine its advantages and disadvantages, generally using welded steel pipe with high precision, wall thickness uniformity, to stainless steel tube inside surface brightness (steel plate material surface brightness control level development decision) and any one length. Therefore, it shows its economy and aesthetics in carrying out high precision as well as low-pressure working fluid applications.

From the above processing can be clearly seen in a process: first, the wall thickness of the product, the more economical development of practical, thinner wall thickness, processing business costs will increase substantially; second, the product process research determines its limitations, general low precision seamless steel tube: uneven thickness distribution, bright tube long low-cost high appearance, and the internal and external pitting of the surface and the black spot is not easy to remove; Plastic As the third inspection, must have offline data processing. Therefore, high pressure, high strength, mechanical structure, and so on show superiority.

Stainless steel round tubes have their own different uses
Stainless steel tube is a practical and economical steel and is an important influence on the steel industry products. Widely used in social life for decoration and industry, many Chinese in the market enterprise production of stair handrails, windows, railings, furniture, and so on. Common 201 and 304 are two different materials. Stainless steel pipe is a kind of hollow cylindrical bar with many enterprises used to carry out decoration or piping systems to transport working fluids, such as stainless steel in buildings as well as handrails and pipelines conveying oil, gas, water, air, steam, is the application of stainless steel as a decorative pipe. In addition, under the same bending and plasticity conditions, light weight is one of its advantages, so it is widely used in the manufacture of mechanical parts and engineering structures.