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Industrial Pipeline Systems Carbon Steel Plate Flanges custom

Industrial Pipeline Systems Carbon Steel Plate Flanges Manufacturers

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Versatile Carbon Steel Plate Flanges

Plate Flanges, also known as Flat Flanges or Blank Flanges, are among the most economical and widely used flange types in general industrial piping systems. Cut directly from carbon steel plate to ASTM A105 or A36 specifications, these flanges offer a cost-effective solution for low-to-medium pressure industrial applications where the premium of a forged flange is not required. As a professional manufacturer, we supply plate flanges in two main configurations: the Plate Flange with a weld attachment hub (Welding Neck or Slip-On equivalent), and the Spectacle/Blind Plate used for pipe termination or isolation. Our plate flanges are machined to precise tolerances to ensure a proper gasket seating surface and bolt-hole alignment. They are available in standard ASME B16.5, BS 4504, and DIN 2501 dimensions to suit a wide range of international industrial projects, from water treatment plants and HVAC systems to low-pressure chemical distribution networks.

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Plate Flange Technical Data

ParameterSpecification Detail
Material GradeASTM A105, A36, Q235B, S235JR
Design StandardASME B16.5, DIN 2501, BS 4504, EN 1092-1
Pressure ClassClass 150 to Class 300 (PN6 to PN40)
Size Range1/2" to 120" (DN15 - DN3000)
Facing TypeFlat Face (FF), Raised Face (RF)
ManufacturingCNC Plasma / Laser Cut, Machined Face

Industrial Pipeline Applications

Carbon steel plate flanges are a backbone component in numerous industrial pipeline systems across many sectors. In water and wastewater treatment plants, they are used extensively for pump connections, filter vessel nozzles, and valve flanges in low-pressure service. In HVAC systems and district heating networks, plate flanges connect fan coil units, heat exchangers, and expansion vessels. They are widely used in the pulp and paper industry for non-corrosive utility water and compressed air systems. Industrial gas distribution networks for nitrogen, compressed air, and low-pressure steam use plate flanges for their economical construction. Large-diameter plate flanges are common in tunnel ventilation systems and industrial ductwork. In the food processing and agricultural industries, they connect grain drying equipment, large-diameter vent stacks, and bulk material handling systems where pressure ratings are moderate.

Economic & Practical Advantages

  • Cost Efficiency: Plate construction significantly reduces material and machining costs compared to forged flanges, making it ideal for large-diameter and budget-sensitive projects.
  • Large Diameter Capability: Easily produced in diameters exceeding those available in forged form, supporting very large pipeline and tank nozzle applications.
  • Customization Flexibility: CNC cutting allows rapid production of non-standard bolt patterns, thicknesses, and special geometries for custom equipment.
  • Wide Standard Compatibility: Available to ASME, DIN, BS, and JIS standards, simplifying procurement for multi-national industrial projects with mixed specifications.

Supply & Logistics Support

We support payments via T/T, L/C, and D/P. For large infrastructure projects requiring hundreds of plate flanges in multiple sizes, we offer bulk pricing and scheduled delivery programs. Standard-size plate flanges in common pressure classes are held in stock for immediate dispatch. Flanges are painted with anti-rust primer and packed in steel-banded wooden pallets for sea freight, or in cartons for smaller air-freight orders. We provide full documentation, including material certificates, dimensional inspection reports, and coating compliance records. Our production team can manufacture custom plate flanges to non-standard drawings within competitive lead times, supported by our in-house CNC machining and laser-cutting equipment.

  • Q: What is the maximum size available for carbon steel plate flanges?
  • A: We can manufacture custom plate flanges up to DN3000 (120") and beyond for large-diameter tanks and ductwork, subject to engineering review for very large diameters.
  • Q: Are plate flanges suitable for high-pressure gas service?
  • A: Plate flanges are generally limited to Class 150-300 (PN10-PN40) pressure ratings. For higher pressure gas service, forged weld neck flanges are recommended for superior strength and fatigue resistance.
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Jiangyin Gaoxin Pipe Fittings Co., Ltd.
About Us
JIANGYIN GAOXIN PIPE FITTINGS CO.,LTD.
Our company is a professional manufacturer of pressure piping components. As Industrial Pipeline Systems Carbon Steel Plate Flanges Manufacturers，Our product range covers butt-weld, socket-weld, and threaded pipe fittings, including flanges and customized non-standard parts. These products are widely used in industries such as oil & gas, chemical processing, power generation, shipbuilding, papermaking, metallurgy, pharmaceuticals, and food processing. We manufacture according to standards such as ASME, EN,JIS,DIN,ANSI,GOST, MSS, GB/T,HG, DL, SH, SY,and have a complete range of inspection equipment, a strict quality control system, and various certifications（PED,AD2000,EAC, ABS,BV, DNV,NORSOK M650, ISO9001,ISO14001,ISO45001,etc.）, making us a leader in the industry.

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