Carbon Steel Plate Flange
Product Overview
A Carbon Steel Plate Flange is a flat circular disc used for bolted connections in low-pressure piping systems and is typically welded to pipe ends.
Technical Specifications
|
Parameter Category |
Technical Parameter |
Range / Options |
Typical Example (DN100 / PN16) |
|
Standards |
Manufacturing Standard |
EN 1092-1 / GB/T 9119 / JIS B2220 / ASME B16.5 |
EN 1092-1 Type 01 |
|
Type |
Flange Type |
Plate / Flat / Slip-On |
Plate Flange |
|
Size |
Nominal Size |
DN15 – DN2000 (1/2" – 80") |
DN100 |
|
Pressure |
Pressure Rating |
PN6 / PN10 / PN16 / PN25 / PN40 / Class 150 |
PN16 |
|
Material |
Carbon Steel Grade |
S235JR / Q235B / A36 / SS400 |
S235JR |
|
Main Dimensions |
OD / Bore / Thickness |
Standard range per DN size |
OD 220 mm / Bore 115.5 mm / 22 mm |
|
Bolting |
Bolt Pattern |
4–48 holes, M12–M45 |
8 holes, M16 |
|
Facing |
Face Type |
Flat Face (FF) / Raised Face (RF) |
FF |
|
Surface |
Treatment |
Black paint / Anti-rust oil / HDG (optional) |
Black paint |
Material Traceability & Testing
Steel Mill Sourcing: Raw material is purchased from approved steel mills and supplied with corresponding material certificates.
Heat Number Assignment: Each batch is marked with a heat number for traceability.
Spectral PMI Verification: Chemical composition is checked using spectrometers.
Mechanical Property Assessment: Tensile, hardness, and impact testing are performed according to project requirements.
Ultrasonic Flaw Detection: Internal defects are checked by ultrasonic testing before further processing.
EN 10204 3.1 Certification: Mill Test Certificates are issued and matched to heat numbers.
Manufacturing Capabilities
Process Flow
Plate cutting, heat treatment, CNC turning, drilling, and marking.
Equipment
CNC lathes, drilling machines, and cutting equipment are used throughout production.
Monthly Output
Production capacity reaches approximately 1,500 tons per month.
Custom Drawings
Production follows customer drawings for non-standard sizes.
Face Machining
Sealing faces can be processed as smooth or serrated finishes.
Component Marking
Heat numbers and size data are stamped before packing.
Quality Assurance System
Quality System: Production follows ISO 9001:2015 and PED 2014/68/EU requirements.
Sealing Face Check: Surface roughness is checked during machining.
Dimensional Inspection: Critical dimensions are verified before final acceptance.
Go/No-Go Gauge: Bolt hole spacing is checked using fixed gauges.
Nonconformance Control: Rejected items are isolated and recorded.
Documentation Review: Inspection records are reviewed against material certificates before shipment.
Industrial Applications
|
Application Field |
Operational Deployment / How It Is Used |
|
Low-Pressure Water Lines |
Municipal water and drainage pipeline connections |
|
HVAC Piping Systems |
Heating, ventilation, and chilled water loops |
|
Irrigation Networks |
Pump stations and filtration pipeline connections |
|
Wastewater Treatment |
Sludge pumps and low-pressure valve systems |
|
Exhaust Gas Ducting |
Ventilation ducts and blower systems |
|
Storage Tank Utilities |
Pipeline connections for water, oil, or chemical media |
Packaging & Logistics Compliance
Wooden Packaging
ISPM 15 compliant plywood crates are used for export.
01
Corrosion Protection
VCI bags are applied for moisture protection.
02
Surface Separation
Plastic film is used between machined faces.
03
Steel Strapping
Export crates are secured with steel straps for sea transport.
04
Marking
Package markings include weight, dimensions, and handling instructions.
05
FAQ
Q: Can you machine custom inner diameters for non-standard pipes?
A: Yes, CNC machining allows adjustment based on provided drawings and tolerances.
Q: How do you prevent warping during cutting?
A: Cutting paths are arranged to reduce heat concentration during processing.
Q: What sealing face finishes are available?
A: Smooth finish and serrated patterns such as concentric or spiral are available.
Q: Are bolt holes drilled or punched?
A: All bolt holes are drilled using multi-spindle equipment.
Q: Can hot-dip galvanizing be provided?
A: Yes, HDG or black coating can be applied based on order requirement.
Q: What is the standard lead time?
A: Typical lead time is 25–30 days, depending on order quantity and material availability.
Q: Are third-party inspections accepted?
A: Yes, third-party inspections such as SGS, TÜV, or customer-appointed agencies can be arranged before shipment.
Q: What information is required for quotation?
A: To prepare an accurate quotation, please provide the flange standard, size, pressure rating, material grade, quantity, and surface treatment requirements.
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