Plate Flanges – ASME/ANSI B16.5

VikTech Fittings is a well-recognized manufacturer, exporter, and supplier of Plate Flanges, designed as per ASME/ANSI B16.5, B16.47, and other international standards. Plate Flanges are widely used in low-pressure applications and provide a simple, cost-effective method of connecting pipes, valves, and fittings in a piping system.

Unlike Weld Neck or Slip-On Flanges, Plate Flanges are made from a single flat steel plate without a hub. They are generally bolted and gasketed to form a seal and are commonly used in industries where easy assembly and disassembly is required.

What is a Plate Flange?

A Plate Flange (also called Flat Flange or Plain Flange) is cut from a steel plate and drilled to match the pipe bolting requirements. It is usually welded directly to the pipe end, creating a secure joint for low-pressure and low-temperature applications.

Plate Flanges are most commonly used in water supply, shipbuilding, and chemical processing industries where heavy pressure resistance is not necessary.

Types of Plate Flanges

• Flat Face Plate Flange (FF)

• Raised Face Plate Flange (RF)

• Screwed / Threaded Plate Flange

• Custom Machined Plate Flanges

• Large Diameter Plate Flanges (Series A/B)

Materials & Grades

✅ Carbon Steel Plate Flanges

• ASTM A105 / A105N

• ASTM A350 LF2 (Low-Temperature Carbon Steel)

• ASTM A516 Gr.60 / Gr.70

• IS 2062 / Mild Steel

✅ Stainless Steel Plate Flanges

• ASTM A182 F304 / 304L

• ASTM A182 F316 / 316L

• ASTM A182 F321 / F347

✅ Duplex & Super Duplex Steel

• UNS S31803 / S32205

• UNS S32750 / S32760

✅ Alloy Steel Plate Flanges

• ASTM A182 F1, F5, F9, F11, F22, F91

✅ Nickel Alloys & Special Metals

• Inconel 600 / 625 / 800 / 825

• Monel 400 / K500

• Hastelloy C22 / C276

• Alloy 20

• Copper Nickel (Cu-Ni) 70/30, 90/10

• Titanium Gr.2 / Gr.5

Advantages of Plate Flanges

• Economical and cost-effective design

• Simple manufacturing and easy installation

• Ideal for low-pressure pipelines

• Easier cleaning, inspection & modification of pipelines

• Available in a wide range of materials & standards

Applications of Plate Flanges

• Water treatment plants

• Shipbuilding & Marine industry

• Chemical and fertilizer plants

• Food & beverage processing

• Low-pressure oil & gas pipelines

• Firefighting & HVAC systems

Technical Specifications

Specification ItemDetailsStandardASME/ANSI B16.5, B16.47, DIN, EN 1092-1, JIS B2220, BS 4504Size Range½” (DN15) to 48” (DN1200)Pressure RatingClass 150, 300, 600, PN6, PN10, PN16, PN25, PN40Facing TypesFlat Face (FF), Raised Face (RF)ThicknessSCH 10, 20, 40, 60, 80, 160, XXSTestingPMI, UT, Hydro Test, NDT, NACE MR0175, Third-Party InspectionCertificationEN 10204 3.1 / 3.2, ISO, CE