The most common stainless steel alloy used in stainless steel applications, 18/8 chromium-nickel austenitic stainless steel, is utilized to make stainless steel 304 flanges. The minimum yield and tensile strengths for 304 stainless steel flanges are 215 MPa and 505 MPa, respectively.
The substance is resistant to heat up to 870 degrees Celsius. Carbon steel Fittings manufacturers provide various flanges, like the slip-on SS 304 flange utilized in precise applications with seamless pipes.
The A182 F304 flange also has various pressure classes, often known as pressure numbers, ranging from 150 to 2500. The numerals range from PN6 to PN64 for pressure. The flanges include plate flanges, threaded SS 304 flanges, and forged flanges.
General flanges
The use of flanges as a connecting element for pipes is generally imposed by the need for assembly and disassembly equipment or parts of pipes.
Free flanges
Their use is economical for aggressive fluids that require pipes made of expensive materials (stainless steel, etc.), so the flanges may be constructed from less expensive materials like aluminium, carbon steel, or other materials.
Excellent resistance to corrosion
In a humid environment, a thick layer of oxide forms, with the surface adhering to a continuous, non-porous film that is stable and insoluble in the pH range of 4.5 to 8. The outer portion of the oxide is porous and hydrated with minute particles or white deposits. Most of the time, this natural passivation permits using aluminium flanges with rough surfaces. No contact corrosion is generated on the contact surface between stainless steel and aluminium.
For this reason, G-flanges from Slip on flanges manufacturers in india are generally supplied with rough surfaces without any treatment. For special needs, the flanges can be covered with epoxy paint which can withstand even the most rigid temperatures and can resist all chemical components such as acids, oils, and corrosion.
Sizing of the flanges
The thicknesses above DN 25 and up to DN 250 are according to the UNI 6089 (DIN 2642) standards.
At Alloy Steel Flanges manufacturers in india, tests have been conducted by official bodies that confirm the tightness of the TP-TYPE flanges. For example, the maximum allowed pressure from DN500 ranges from 6 to 4 bar, depending on the size.
Millions of GEA flanges have been used in actual applications for many years. A technological manufacturing system that has earned the coveted ISO 9001: 2015 certifications has also demonstrated that the aluminium flanges.
Painted flanges
When the flanges are placed in particularly humid environments or are buried, or when any oxidation must be excluded for aesthetic reasons, flanges covered with a powder-based enamel with high mechanical strength and good chemical resistance are used.
The surface of the flange is first treated to ensure maximum adhesion of the coating layer and maximum corrosion resistance. The powders are then applied electrostatically and, after firing in the oven, form a very adherent and resistant film but elastic enough to follow the thermal expansion of the flange.