Xintai Valve Group Has Obtained API 624 Certification And ISO 15848-1 Certification —

Recently, Xintai Valve Group successfully passed the micro leakage performance test of ball valves, gate valves, globe valves, butterfly valves and other products, and obtained the API 624 certification certificate and ISO 15848-1 certification certificate issued by TUV Rheinland GmbH in Germany.

In recent years, people's awareness of safety and environmental protection has gradually increased, and the requirements for the use of valves are also increasing. In many fields, especially in the petroleum, petrochemical, coal chemical and other industries, if the selected valves can meet low leakage standards, it will greatly reduce the leakage and emission of toxic, flammable and explosive media in the equipment, and avoid accidents that endanger life and property safety such as fires, explosions, and poisoning caused by valve leakage. But the basic limitations of internal and external leakage conditions have made it difficult to meet the small emission requirements of valves to the external environment, that is, small external leakage. However, this requirement cannot be determined by conventional water pressure and air pressure tests, and requires the use of more scientific methods and precision instruments for detection. Micro leakage standards and detection have emerged.

At present, there are many standards for testing and certifying the leakage control performance of process control valves internationally. In the European region, the ISO15848-1 testing standard is currently recognized as the dominant testing standard in Europe; The main standard used in the United States is API 624. Obtaining these two certifications marks a further recognition of the product performance of Xintai Valve Group internationally, and will be a great help for Xintai Valve to ride the waves in the international market.

API 624 Methane Micro Leakage Types

Q1.Introduction to API 624 Anti Leakage Test

API 624 testing is a standard for low leakage type testing of lifting rod valves with FE graphite packing. The test uses methane with a purity of at least 97% as the test medium, completes 310 mechanical cycles in three thermal cycles, and has a high temperature of 260 ℃± 5%. During the testing process, the gas chromatograph records static and dynamic valve stem leakage measurements. It is not allowed to adjust the packing during the entire testing process. When the leakage value does not exceed 100PPMV during the entire testing process, the test is considered to have passed.

Q2.What are the application areas for API 624 detection?

The rising stem and rising/falling rotary stem valves (gate valves and globe valves) with graphite packing, with nominal diameter of more than NPS 24 and Pressure rating of more than CLASS 1500, are not within the scope of this test standard.

The valve design standards involved are API602, API600, API603, and API623.

All valves with the same design as the test valve and meeting the following limitations can be considered to have undergone type testing;

For all API602 valves, the test valve with size of NPS 3/4 and Pressure of CLASS 800 can cover all valves with size of NPS 1 and below and Pressure of 800 # and below. For all API602 valves, the size is NPS 1 1/2, the Pressure is CLASS 800, and the test idle valve can cover valves from NPS 1 1/4 to NPS 2 1/2, and the Pressure is CLASS 800 and below.

For all AP1602 valves, the test mesh door with size of NPS 3/4 and Pressure of CLASS 1500 can cover all valves with size of NPS 1 and below and Pressure of CLASS 1500. For all API602 valves, test valves with size of NPS 1 1/2 and Pressure of CLASS 1500 can cover valves with size of NPS 1 1/4 to NPS 2 1/2 and Pressure of CLASS 1500.

ISO15848-1 Low Leakage Performance Test

Q3.Introduction to ISO 15848 Valve Micro Leakage Testing

For various types of valve products, conventional water and air pressure tests cannot determine, and more scientific methods and precise instruments are needed to detect small external leaks, which are called micro leaks. Valves that meet low leakage requirements have been widely used abroad, and with the construction of projects by foreign companies in China, some valves for toxic media and flammable or explosive media have adopted micro leakage valves.

Q4.What are the key points of ISO 15848 micro leak valves?

1. The castings of the valve can meet the requirements of helium gas testing. Due to the small molecular weight of helium molecules, which are easy to penetrate, the quality of the castings is crucial;

The sealing between the valve body and the valve cover is often gasket sealing, which belongs to static sealing and is relatively easy to meet leakage requirements;

3. Graphite packing structure is commonly used for sealing at the valve stem. As the sealing at the valve stem is a dynamic seal, graphite particles are easily carried out from the packing during the movement of the valve stem. Therefore, special micro leakage packing should be selected, and the gaps between the packing and the valve stem, packing box, pressure sleeve and valve stem and packing box should be controlled. The machining roughness of the valve stem and packing box should also be controlled. These control measures are key.

Micro leakage valves represent the future direction of valve development and will be increasingly widely used. Xintai Valve Group strengthens self upgrading, constantly challenges product limits, and strives to provide high-quality valve products for harsh working conditions, safeguarding safe applications.

Xintai Valve Group Co., Ltd. was established in 1998. It is a modern professional valve manufacturing company that integrates scientific research, casting, production, and sales services. The headquarters of the group is located in Longwan Airport New Area, Wenzhou, with scientific research technology and precision manufacturing as the core. The factory covers an area of 30800 square meters. The two major casting bases are located in the central industrial zone of Longwan District, Wenzhou, with a factory area of 9800 square meters; Wenzhou Longwan Airport New Area Foundry Base, with a factory area of 28000 square meters. The company has successively passed ISO9001 quality management system certification, domestic TS safety certification, CE, ISO14001, OHSAS18001, API and other certifications, with complete testing equipment. We have a first-class research team in the valve industry and strong product development and manufacturing capabilities. The high-temperature and high-pressure fixed hard seal forged steel ball valve we have developed has been included in the "2009 Wenzhou Technology Innovation Key Project". In 2011, the company was rated as a national high-tech enterprise and a high growth enterprise in Wenzhou City. The company is the drafting unit of national standards for natural gas ball valves and oxygen valves, mainly serving the fields of petroleum, natural gas, chemical industry, power plants, metallurgy, national defense, water conservancy engineering, pharmaceuticals, etc.