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Product description

Stainless Steel Capillary Tube Description:

Whether you need to exchange device tubing as a section of your troubleshooting or want to minimize the dwell extent of your system as you pass to narrower columns. As one of the most professional stainless steel capillary tube suppliers    in China, WENZHOU HUASHANG STEEL CO., LTD. has the first-rate tubing in the lengths. Tubing is precision cut, resulting in clean, square-cut ends besides ovality. This capillary tube also features lean and easy floor finish.

 

Capillary Tubing from WENZHOU HUASHANG STEEL CO., LTD. owns the following features as good flexibility, corrosion resistance, high-temperature resistance, tensile strength, water resistance, etc. For the capillary tube, the minimum size is up to 0.19mm and minimum thickness is 0.02mm, and our tolerance is very small. All brightly annealed technique makes a clean inner surface. High finish, no oil or grease particles ensure the optimal and uniform flow of liquids and gases from the sensor to the measuring instrument.

 

The stainless steel capillary pipe has good corrosion resistance, high-temperature resistance, anti-wear, anti-pilling and good flexibility and other functions. It can also shield electromagnetic properties and be bent freely to form a wide variety of bending angles. The stainless steel capillary tubes can be kept from deforming regardless of the rotation to each angle, bring convenient for our daily life.

 

  ss capillary tube     produces a radiation-resistant alloy steel in the air. Because of its aesthetically pleasing surface and good corrosion properties, the stainless steel capillary tube doesn't require color plating. In order to ensure the corrosion resistance of the stainless steel capillary, it is necessary to select a steel containing more than 12% chromium when selecting the steel.

 

Length: Cut to Length

 

Stainless Steel Capillary Tube Sizes & Tolerance

 

Production name

OD / mm

OD tolerance / mm

W.T/mm

W.T tolerance/mm

 

Capillary tube

0.8-2.0

+-0.02

0.08

+-0.01

 

2.0-6.0

+-0.02

0.1-0.5

+-0.02

6.0-10.0

+-0.03

0.5-1.5

+-0.02

super capillary tube

<0.8

+ -0.02 / or collector

0.02-0.08

+-0.01/or smaller

 

ADVANTAGES OF SS CAPILLARY TUBE

The ss capillary tube has high precision and can be used in various measuring instruments. Based on its thick-walled, small-diameter structure (usually 1/8" or smaller diameter), such pipes will be used in various key applications, including nuclear reactors and even resistance-heated ion rocket jets.

 

Key Uses

 

With the technological advances in the life science market, small components can be used under higher operating pressure. Ultra-small-diameter capillary is very important for high performance and ultra-high performance liquid chromatography (HPLC and UPLC) equipment. Generally, the outer diameter of such capillaries is less than 1/16 (1.59 mm), which can be used in many key applications. In addition, the use of seamless capillaries in key applications can improve the necessary sampling efficiency.

 

Certain professional manufacturing technologies can achieve the cleanliness of key products required for such applications. Impurities such as grease, grease and other foreign substances left behind in the manufacturing process of stainless steel capillaries can lead to cross-contamination and sample reading errors. Before installation, traditional pipe fittings usually require additional cleaning on site. In order to minimize the risk of cross-contamination and save time, some special processes have been developed. Through this process, the pipes will be cleaned immediately after the manufacturing process under high pressure and high temperature to remove all kinds of impurities left behind. In this way, the impurities under the fittings can be reduced and the integrity of the samples can be ensured, thus providing consistent results.

 

Advantages

 

Because the high-quality seamless capillary is made of a single piece of homogeneous steel and has continuous and uninterrupted granular structure, it is more suitable for the major application sites requiring the use of homogeneous materials for the whole tube. Welding and mechanical fittings can produce discontinuity, which may lead to crevice corrosion and mechanical failure.

 

High-quality stainless steel will form a passive protective layer on the surface under oxygen-enriched conditions. Because different alloying elements have different melting points, changing the key chemical composition in the heat affected zone (HAZ) can cause the layer to be affected by poor heat treatment and welding.

 

MAIN CONSIDERATIONS IN CHOOSING SS CAPILLARY TUBE

Most high-performance liquid chromatography columns are made of stainless steel. However, when choosing pipe material, the first thing to consider is whether it is chemically compatible with the sample and mobile phase. Selection of fittings for liquid runners is often the source of problems in separation and sampling. This is usually due to the chemical incompatibility between the fittings and the sample and/or mobile phase. Some samples will "stick" on the surface of stainless steel tubes, resulting in sample loss, reduced production and residual. However, if it is determined that stainless steel is the best "material" compatible with the sample, no impurities such as oil, grease and other foreign matter from the manufacturing process should be included in the inner diameter range of the pipe. Foreign bodies may cause cross-contamination and sample reading errors. Therefore, in this industry, the cleanliness of pipe fittings is very important, and traditional pipe fittings usually need to be cleaned on site before installation.

 

When determining the chemical compatibility of stainless steel with the sample, we must consider the three main characteristics of the capillary provided by stainless steel:

 

  1. Inner Diameter Smoothness

 

This ensures maximum permissible laminar flow, thereby reducing turbulence and improving system resolution.

 

  1. concentricity

 

The highly concentric inner diameter will reduce the fluid disturbance at the junction and help to reduce the band broadening.

 

  1. Volume consistency

 

If the volume control is better, it can help to reduce the residence time and diffusion effect, thereby improving the overall peak resolution.

 

Choosing the right fittings ensures the integrity of the sample and provides consistent results. It can also improve the measurement speed and accuracy. Clean inner holes in the ss capillary tube will restrict Newtonian fluid passing through the sample ring. All these characteristics will lead to better sample readings.

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