Plate Flange / Open Flange (Flat Flange)

1️⃣ Product Introduction 

VikTech Fittings is a leading manufacturer, exporter, and supplier of high-quality Plate Flanges (Open Flanges / Flat Flanges) manufactured in accordance with ASME standards including ASME B16.5, along with DIN, EN, and IS specifications.

Plate Flanges are manufactured from high-quality steel plates and are typically used in low-pressure and non-critical piping systems. Unlike forged flanges, plate flanges are cut and machined directly from steel plates, making them a cost-effective solution for structural, water, utility, and fabrication projects.

Open/Plate Flanges are widely used in water pipelines, fabrication works, ducting systems, chemical plants, and general engineering applications.

2️⃣ Technical Specifications

Product Name              Plate Flange / Open Flange

Manufacturing              Plate Cut & Machined

Standards                    ASME B16.5 (Drilling Pattern), EN 1092-1, DIN, IS

Size                             Range½″ (DN15) to 72″ (DN1800)

Pressure Rating          PN6, PN10, PN16, Class 150 (Low Pressure)

Facing Type                Flat Face (FF) / Raised Face (Optional)

Thickness                   As per standard or custom

Drilling                        Standard or custom bolt hole drilling

Certification                EN 10204 3.1 (On Request)

3️⃣ Available Material Grades

▶ Carbon Steel (CS)

• ASTM A36

• ASTM A105 (Plate Form)

• IS 2062 E250 / E350

▶ Mild Steel (MS)

• IS 2062

• IS 2041

▶ Stainless Steel (SS)

• ASTM A240 304 / 304L

• 316 / 316L

• 310

• 321

▶ Duplex Steel

• UNS S31803

• UNS S32205

▶ Other Materials (On Request)

• Alloy Steel

• Nickel Alloys

• Copper Nickel

4️⃣ Size & Pressure Range

• Size: ½″ to 72″

• DN Range: DN15 to DN1800

• Pressure Ratings: PN6 / PN10 / PN16

• Suitable for low to moderate pressure systems

• Custom thickness available for higher strength requirements

Plate flanges are generally used where high pressure rating is not critical.

5️⃣ Standards & Compliance

• ASME B16.5 (Drilling Compatibility)

• EN 1092-1

• DIN Standards

• IS Standards

• ISO Certified Manufacturing

6️⃣ Design & Features

• Flat circular plate with bolt holes

• No hub

• Can be supplied with or without raised face

• Easy fabrication

• Economical alternative to forged flanges

• Ideal for structural & utility use

Dimensional tolerances maintained as per drilling standards to ensure proper alignment with mating flanges.

7️⃣ Manufacturing Process

• Raw steel plate selection

• CNC profile cutting

• Machining & facing

• Drilling bolt holes

• Surface finishing

• Inspection & marking

8️⃣ Pressure & Temperature Capability

MaterialTemperature RangePressure UseMild SteelUp to 400°CLow PressureStainless SteelUp to 800°CModerate PressureDuplexUp to 300°CCorrosive Service

(Actual rating depends on thickness & design.)

9️⃣ Testing & Quality Control

✔ Visual Inspection
✔ Dimensional Inspection
✔ PMI Testing (SS/Duplex)
✔ Hardness Testing
✔ Third Party Inspection – TUV / BV / SGS (On Request)
✔ Mill Test Certificate (MTC 3.1)

🔟 Applications & Industries

• Water Supply & Irrigation

• Structural Fabrication

• HVAC & Ducting Systems

• Chemical Plants

• Wastewater Treatment

• Infrastructure Projects

• Storage Tanks

• Low-Pressure Pipelines

Plate/Open Flanges are preferred where cost-effectiveness and ease of fabrication are important.

1️⃣1️⃣ Surface Finish Options

• Black / Self Finish

• Anti-Rust Oil

• Painted

• Hot Dip Galvanized (HDG)

• Epoxy Coated

• Zinc Coated

1️⃣2️⃣ Packing & Marking

• Wooden pallets

• Bubble wrapping

• Plastic wrapping for corrosion protection

• Marking: Size, Material, Thickness, Standard

• Custom project marking available

• Seaworthy export packing

1️⃣3️⃣ Why Choose VikTech Fittings?

• Competitive plate flange pricing

• Custom thickness & drilling

• Large diameter availability up to 72″

• Quick production for urgent projects

• Bulk supply capability

• Export-ready documentation

• Reliable delivery schedule

1️⃣4️⃣ SEO Keywords

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