Views: 0 Author: J-VALVES Publish Time: 2022-06-06 Origin: Site
In the field of industrial valves, flanged gate valves are widely used in industries such as petroleum, chemical engineering, and electric power due to their simple structure, good sealing performance, and low flow resistance. However, the standard systems in different countries and regions vary significantly, which requires users to understand and compare relevant standards when choosing products. This article will mainly analyze the technical requirements and performance differences of J-VALVES WCB ELECTRIC ACTUATED FLANGED GATE VALVES under Chinese national standards (GB) and international standards (such as ISO, DIN, ANSI, etc.).
Standard Type | Standard Number | Main Contents | Applicable Scope | Characteristics |
Chinese National Standard (GB) | GB/T 12234 | Design and manufacturing standards for cast iron flanged gate valves, applicable to working conditions with a nominal pressure of PN1.6 - 25.0 MPa and a temperature range of -29 - 600 °C. | Domestic production and use in China | Emphasizes that the valve sealing surface material is carbide alloy or stainless steel, with good corrosion resistance and sealing performance. |
International Standard (ISO) | ISO 7007 | The flanged gate valve standard formulated by the International Organization for Standardization, covering design, manufacturing, and testing requirements. | Universally applicable worldwide, suitable for various industrial fields | Has strong standard uniformity, focuses on the universality and interchangeability of valves, but specific parameters may vary from country to country. |
German Standard (DIN) | DIN 3352 | The German industrial standard, applicable to flanged gate valves made of carbon steel and stainless steel materials, with a pressure rating of PN10 - PN32. | European market | Emphasizes the sealing performance and high-temperature resistance of valves, and the flange connection dimensions strictly follow the DIN 2543 standard. |
American Standard (ANSI) | ASME B16.10 | The standard of the American Society of Mechanical Engineers, applicable to flanged gate valves made of carbon steel, alloy steel, and stainless steel materials, with pressure ratings ranging from 150 LB to 2500 LB. | North American market | Focuses on the operational flexibility and pressure resistance of valves, and there are significant differences in dimension marking compared to European standards. |
Japanese Standard (JIS) | JIS B2031 | The Japanese industrial standard, applicable to flanged gate valves made of gray cast iron and ductile iron materials. | Japanese and East Asian markets | Emphasizes the sealing performance and corrosion resistance of valves, suitable for relatively mild working environments. |
Chinese National Standard (GB/T 12234)
· Design and Manufacturing Standards: According to GB/T 12234, valves are required to meet the requirements for the sealing surface material of carbide alloy or stainless steel to ensure corrosion resistance and sealing performance during long-term use.
· Material: Mainly uses carbon steel and stainless steel, suitable for high-pressure and high-temperature working conditions.
· Nominal Pressure: PN1.6 - 25.0 MPa.
International Standard (ISO 7007)
· Design and Manufacturing Standards: ISO 7007 puts forward comprehensive requirements for the design, manufacturing, and testing of valves, emphasizing universality and interchangeability.
· Material: Supports multiple material selections, including carbon steel, stainless steel, etc.
German Standard (DIN 3352)
· Design and Manufacturing Standards: DIN 3352 stipulates the specific dimensions and connection methods of flanged gate valves, applicable to carbon steel and stainless steel materials.
· Nominal Pressure: PN10 - PN32.
American Standard (ASME B16.10)
· Design and Manufacturing Standards: ASME B16.10 is applicable to valves with different pressure ratings, emphasizing operational flexibility and pressure resistance.
· Dimension Marking: There are significant differences compared to European standards.
Japanese Standard (JIS B2031)
· Design and Manufacturing Standards: JIS B2031 is applicable to valves made of gray cast iron and ductile iron materials, emphasizing sealing performance and corrosion resistance.
· Nominal Pressure: Lower pressure ratings, suitable for mild environments.
Chinese National Standard (GB/T 12234)
· Inspection Standard: According to GB/T 12234, valves need to pass pressure tests and sealing performance tests.
· Testing Method: Adopts a combination of hydraulic pressure tests and pneumatic pressure tests.
International Standard (ISO 7007)
· Inspection Standard: ISO 7007 stipulates the methods for pressure testing and sealing performance testing of valves to ensure that products meet international quality requirements.
German Standard (DIN 2543)
· Inspection Standard: DIN 2543 strictly stipulates the flange connection dimensions to ensure the interchangeability and connection reliability of valves.
American Standard (ASME B16.10)
· Inspection Standard: ASME B16.10 conducts detailed tests on the operational flexibility and pressure resistance of valves.
Japanese Standard (JIS B2031)
· Inspection Standard: JIS B2031 conducts special tests on the sealing performance and corrosion resistance of valves.
· Mainly Applicable to: Industries such as petroleum, chemical engineering, and electric power in China.
· Characteristics: High sealing performance and high-temperature resistance.
International Standard
· Widely Applied to: The global market, especially suitable for multinational projects that require unified standards.
German Standard
· Mainly Applied to: The European market, suitable for high-pressure and high-temperature working conditions.
American Standard
· Mainly Applied to: The North American market, suitable for various industrial fields.
Japanese Standard
· Mainly Applied to: The Japanese and East Asian markets, suitable for mild environments.
CONCLUSION
The J-VALVES WCB ELECTRIC ACTUATED FLANGED GATE VALVES have their own advantages under Chinese national standards and international standards. The Chinese national standards focus on sealing performance and high-temperature resistance, which are suitable for domestic high-pressure and high-temperature working conditions. While the international standards emphasize universality and interchangeability, which are suitable for application in the global market. Users should conduct comparative analysis according to specific needs and application scenarios when choosing to ensure that they purchase the most suitable products.
