Comparison of Design Standards for Y-type Strainer: Analysis of Pressure Resistance Performance of Bronze B62 C83600 And Duplex Stainless Steel S31803

In industrial applications, Y-TYPE STRAINER are favored due to their efficient filtering performance and wide range of application scenarios. However, choosing the appropriate materials is crucial for ensuring the performance and service life of the strainer. This article will conduct an in-depth comparative analysis of the pressure resistance performance of two commonly used materials, bronze B62 C83600 and duplex stainless steel S31803, to help engineers and purchasers make more informed decisions.

I. MATERIAL OVERVIEW

(1) Bronze B62 C83600
BRONZE B62 C83600 is an American standard bronze alloy with good mechanical properties and corrosion resistance. Its corresponding grade in China is ZCuSn5Pb5Zn5. This material is widely used in manufacturing parts such as bearings, bushings, and springs due to its excellent casting properties and machinability. Its chemical composition mainly includes copper, tin, lead, and zinc, and this alloy composition enables it to exhibit good corrosion resistance in moderately corrosive environments.

(2) Duplex Stainless Steel S31803
Duex stainless steel S31803 is a high-performance ferritic-austenitic stainless steel, with ferrite and austenite each accounting for approximately 50% in its metallographic struture. This unique microstructure endows S31803 with extremely high strength and good toughness. Its chemical composition contains relatively high amounts of chromium, nickel, molybdenum, and nitrogen, and the combination of these elements makes it perform excellently in terms of resistance to pitting corrosion, crevice corrosion, and stress corrosion. The yield strength of S31803 is more than twice that of ordinary austenitic stainless steel, which enables it to reduce the structural weight while maintaining high strength during the design process.

II. COMPARISON OF PRESSURE RESISTANCE PERFORMANCE

(1) Pressure-bearing Capacity
The pressure resistance performance of BRONZE B62 C83600 mainly depends on its mechanical strength. Although it has good casting properties, its performance may not be as good as that of duplex stainless steel in high-strength pressure environments. According to relevant standards, the tensile strength of bronze materials is generally between 300 and 400 MPa.

In contrast, the tensile strength of duplex stainless steel S31803 can reach above 655 MPa, and its yield strength is ≥ 450 MPa. This means that under the same pressure conditions, S31803 can withstand higher pressures without undergoing plastic deformation. For example, in high-pressure pipeline systems, Y-type strainer made of S31803 can operate stably under higher pressures, while bronze materials may require thicker wall thicknesses to achieve the same pressure resistance effect.

(2) Influence of Temperature
Temperature also has a significant impact on the pressure resistance performance of materials. The pressure resistance performance of BRONZE B62 C83600 performs better at lower temperatures, but its strength may decline in high-temperature environments. This is because the coefficient of thermal expansion of bronze materials is relatively high, and they are prone to softening at high temperatures.

Duplex stainless steel S31803 exhibits more excellent high-temperature performance. Its operating temperature range is from -50°F to +600°F, and within this temperature range, the pressure resistance performance of S31803 is hardly affected. In addition, its relatively low coefficient of thermal expansion and good thermal conductivity enable it to maintain stable mechanical properties in high-temperature and high-pressure environments.

(3) The Relationship between Corrosion Resistance and Pressure Resistance Performance
In corrosive environments, the corrosion resistance of materials directly affects their pressure resistance performance. Although BRONZE B62 C83600 has good corrosion resistance, its pressure resistance performance may be reduced due to corrosion in environments containing strong acids, strong alkalis, or chloride ions.

Duplex stainless steel S31803 performs excellently in a variety of corrosive environments. Its high chromium, molybdenum, and nitrogen contents make it superior to ordinary stainless steel in terms of resistance to pitting corrosion and crevice corrosion. In environments containing chloride ions, the pressure resistance performance of S31803 is hardly affected, which makes it an ideal material for manufacturing Y-type strainer, especially in fields such as chemical engineering and seawater treatment.

III. DESIGN STANDARDS AND APPLICATIONS

(1) Design Standards
The design standards for Y-TYPE STRAINER usually include aspects such as the mechanical properties, corrosion resistance, and processing technology of materials. For BRONZE B62 C83600, its design standards mainly refer to ASTM B505, which stipulates the chemical composition, mechanical properties, and processing technology requirements of bronze materials.

The design standards for duplex stainless steel S31803 are more stringent, and its implementation standards include ASTM A240, ASME SA-240, etc. These standards not only stipulate the chemical composition and mechanical properties of materials but also have detailed requirements for heat treatment processes, welding processes, etc., to ensure the performance of materials in practical applications.

(2) Application Scenarios
BRONZE B62 C83600 is suitable for low-pressure systems in moderately corrosive environments, such as low-pressure pipelines in ships and chemical equipment. Its good casting properties enable it to manufacture complex filter structures, but its pressure resistance performance limits its application in high-pressure systems.

Duplex stainless steel S31803 is widely used in high-pressure, high-temperature, and strongly corrosive environments, such as oil and gas pipelines, chemical equipment, and seawater treatment systems. Its high strength and excellent corrosion resistance make it an ideal material for manufacturing high-performance Y-TYPE STRAINER and can meet the usage requirements under harsh working conditions.

IV. CONCLUSION

In the design of Y-type strainer, choosing the appropriate materials is the key to ensuring the performance and service life of the equipment. BRONZE B62 C83603 and duplex stainless steel S31803 each have their own advantages and disadvantages. BRONZE B62 C83600 has good casting properties and moderate corrosion resistance, and is suitable for applications in moderately pressurized and corrosive environments. However, its pressure resistance performance and high-temperature performance are relatively limited

In contrast, duplex stainless steel S31803 performs excellently in terms of pressure resistance performance, high-temperature performance, and corrosion resistance. Its high strength and excellent corrosion resistance enable it to meet the usage requirements in high-pressure, high-temperature, and strongly corrosive environments. Therefore, for Y-TYPE STRAINER that need to operate under harsh working conditions, duplex stainless steel S31803 is a better choice.

In practical applications, engineers need to comprehensively consider the performance characteristics of materials according to specific working conditions, cost budgets, and service life requirements, and choose the most suitable materials. By comparing the pressure resistance performance of BRONZE B62 C83600 and duplex stainless steel S31803, we can more clearly understand their applicability in the design of Y-TYPE STRAINER, thus providing more reliable solutions for industrial applications.