Shandong Hongsheng Pressure Vessel Co., LTD

ISO 25E UT 150bar 200bar Tanks Argon Carbon Dioxide Cylinder

As the cylinder and test equipment are being filled with water, care shall be taken to ensure that no air is trapped in the circuit by operating the hydraulic pump until water is discharged from the vent or air-release valve. During the test, pressurization shall be carried out in two successive stages. 

a) In the first stage, the pressure shall be increased at a rate of not more than 5 bar/s up to a pressure value corresponding to the initiation of plastic deformation. 

b) In the second stage, the pump discharge rate shall be maintained at as constant a level as possible until the cylinder bursts.

Seamless gas cylinder

1) The form of the universal seamless cylinder is: the cylinder body is cylindrical, one end is convex, concave or H-shaped bottle bottom, and the other end is a spherical bottle shoulder with a neck. Above the neck there is a bottle opening with tapered threads for the assembly of the bottle valve.

Commonly used bottle forms are: 1) concave bottom; 2) convex with base; 3) Convex bottom; 4) H-shaped bottom; 5) Bottomless double mouth.

Cylinders with convex bottoms and a capacity of 12 litres or more are usually fitted with a cylindrical or quadrangular base to enable them to stand upright on the ground.

 Base suit and size requirements: it is set on the gas cylinder under red heat, the distance between the grounding plane and the highest point of the convex surface of the bottle bottom should not be less than 10mm according to the standard requirements.

On cylinders containing permanent and liquefied gases of a volume equal to or greater than 5 litres, a collar with external thread is arranged on the outside of the neck for the installation of a bottle cap or cover for the protection of the cylinder valve.

Bottle caps are divided into two types: fixed and removable.

The company in line with the "quality is the life of the enterprise" business philosophy;

In the production process, layer upon layer of checks to ensure to provide users with good quality, stable performance, safe and reliable products;

The products are mainly seamless gas cylinders and medical instruments of various specifications, supporting the refrigeration torch, medical equipment production units, industrial and mining enterprises, gas companies, etc.

Today's effort is tomorrow's success, believe that Shandong Hongsheng pressure vessel Co., Ltd. will become your development partner forever.

1、Cylinders production is a process as well as a peace of mind. 

Only rigorous production inspection, in order to let you use peace of mind

2、The manufacturing entity shall, according to the needs of the manufacturing process of the products, assign and appoint quality assurance engineers and designers, materials, techniques, welding, heat treatment, non-destructive testing, physical and chemical testing, inspection and testing. 

As well as the quality control system responsible personnel for spinning bottom and closing of gas cylinders, winding and curing of fiber wound gas cylinders, forming of non-metallic inner bladder, filling and curing of filled gas cylinders, insulation material wrapping and vacuuming of low-temperature adiabatic gas cylinders and other processes

3、Hydraulic burst test of gas cylinders: 

Low temperature performance of gas cylinders

When the temperature is lower than a certain critical value, the impact toughness of steel is significantly reduced. The temperature range that makes the impact toughness sharply reduced is the critical temperature of cold brittleness of steel. The lower the critical temperature of steel. It shows that the brittle fracture resistance of steel is stronger.

The impact toughness of different components of steel varies greatly at low temperature. The low temperature impact toughness of general low steel is better than that of carbon steel, which affects the low temperature impact of steel. The important factor is the carbon content of steel.

The increase of carbon content will greatly reduce the impact toughness value and influence the critical temperature of cold brittleness. Therefore, the carbon content should be limited.

Aluminum, titanium, vanadium, manganese and nickel can improve the impact toughness of steel and reduce the critical temperature of cold brittleness. Silicon and molybdenum have the opposite effect.

Test installation The test equipment shall be capable of operating in accordance with the test conditions specified and of producing accurately the information specified . A typical hydraulic burst test installation is illustrated in Figure 9.

4、Marking Valves and cylinders threaded in accordance with this International Standard shall be marked by the symbol “17E” or “25E” as applicable.

5、ISO9809-3 25E UT 150bar GAS Tanks Argon Carbon Dioxide Cylinders

Quality assurance system personnel shall meet the following requirements:

(1) Quality assurance engineer, with working experience in gas cylinder manufacturing, quality management or inspection and professional education background of science and technology;

(2) Responsible personnel of welding and heat treatment quality control system, with welding and heat treatment working experience and professional education background of welding, metal materials and related machinery;

(3) Responsible personnel of inspection and test quality control system, with gas cylinder product inspection work experience and mechanical, welding, material, non-destructive testing and other related professional education background;

(4) Other quality control system responsible personnel, have the work experience and mechanical or related professional education background;

(5) The responsible personnel of the quality assurance system shall be familiar with the tasks and requirements of their posts and be able to perform their post responsibilities through job training.

6、 United States of cylinders

Open and electric furnace steels are restricted to use except for 3BN steels, and the use of pure oxygen converter steels is not yet recognized . There are seven kinds of steel recognized by ICC3AA.

Germany

The material and heat treatment are not specified, the design reference is the yield point of the material. Germany focuses on improving tensile strength and yield point to develop lightweight cylinders. Of course, plasticity requirements are not high. Most of the cylinders with convex bottom are made of steel tube, and the pressure is 19.6mpa (200kGF/cm2).

The French

There are no excessive restrictions on the material of gas cylinders, only the safety factor is above 3, the elongation after fracture is above 12%, and the elongation after fracture times the tensile strength should be above 900.

7、Gas cylinder production equipment and process equipment

Manufacturing units shall have cutting, forming, machining, welding, drying and heat preservation of welding materials, lifting, heat treatment, surface treatment, curing and drying of welding materials as well as necessary tooling and molds required for the manufacture of licensed products.

Special sites and necessary protective measures for pressure test, air tightness test, blasting test and other relevant tests suitable for the licensed products;

Inspection and testing of licensed products shall be completed in the same production site;

A special site (exposure room, dark room, etc.) for nondestructive testing of licensed products;

There are special places for keeping product technical and quality files, regulations and standards and other technical data.

• 25E 200bar gas cylinders
• ISO 150bar gas cylinders
• ISO 200bar gas cylinders
• Argon Carbon dioxide cylinder
• UT gas tanks