Steel Flange Plate
Product Introduction
The Steel Flange Plate is a steel component designed for industrial pipeline connections and structural support. It is primarily used in oil and gas pipeline systems, industrial equipment foundation connections, and transitional connection points within steel structures.
Manufactured from carbon steel or stainless steel plate, these components are produced via CNC cutting (laser, plasma, or oxy-fuel) and standard machining processes-such as drilling, edge finishing, and surface treatment. They are custom-manufactured to non-standard specifications based entirely on the client's engineering drawings.
Technical Specifications
|
Thickness range |
3mm – 200mm |
|
Max. processing size |
Up to 3000mm (larger sizes available upon request) |
|
Processing methods |
CNC laser cutting / plasma cutting / oxy-fuel cutting + CNC drilling |
|
Dimensional tolerance |
Laser cutting: ±0.2–0.5mm (thin plate) |
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Heavy plate processing |
±1.0–2.0mm (machining allowance included) |
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Hole position accuracy |
±0.1mm (CNC precision positioning) |
Material Grades
Carbon Steel
ASTM A36
ASTM A516 Gr.60 / Gr.70 (Pressure Vessel Service)
S235JR / S355JR
Q235B / Q355B
Stainless Steel
ASTM A240 304 / 304L
ASTM A240 316 / 316L
2205 Duplex Steel (Optional)
Product Features
Precision-Controlled Machining
Utilizes CNC cutting and positioning drilling processes to precisely control critical hole spacing and mounting dimensions, ensuring consistent assembly with pipe flanges or equipment mating surfaces and minimizing the need for on-site adjustments.
Direct Production from Engineering Drawings
Supports the import of DXF, DWG, STEP, and PDF drawings; eliminates the need for standard molds, making it ideal for non-standard projects and customized engineering requirements.
High Structural Adaptability
Capable of machining circular, square, irregular, multi-hole, and eccentric flange plates, accommodating complex mechanical systems and non-standard connection configurations.
Manufacturing Process Flow
Raw Material Procurement (Carbon steel / Stainless steel; Material Test Certificate included)
Steel Plate Pre-treatment (Leveling / Surface cleaning)
CNC Cutting (Laser / Plasma / Oxy-fuel)
Hole Processing (CNC drilling / Precision positioning)
Deburring and Edge Finishing (Mechanical trimming)
Dimensional Inspection (Caliper / Template / CMM spot check)
Surface Protection (Anti-rust oil / Painting / Galvanizing – optional)
Export Packaging (Anti-rust film + Wooden crate / Pallet; ISPM 15 compliant)
Application Industries
Steel flange plates are commonly used in the following engineering scenarios:
Oil and gas transmission pipeline connection systems
Connection structures for chemical equipment and pressure vessels
Base installation and support structures for industrial machinery
Connection components for marine engineering and marine equipment
Column bases and transition plates for steel structure buildings
Quality Control and Traceability System
To meet compliance requirements for overseas engineering procurement, we provide a fundamental quality traceability system:
Raw materials accompanied by Mill Test Certificates (MTC)
Batch/Heat number traceability
Records of dimensional and hole-position spot checks
Facilitation of third-party inspections (SGS / BV / TÜV) as per project requirements
Why Choose Us
Expertise in Engineering Drawing Conversion
Extensive experience handling industrial drawing orders for markets in Europe, the Americas, the Middle East, and Southeast Asia; familiarity with ANSI, EN, and DIN structural conventions minimizes the risk of misinterpretation.
Direct Factory Production Model
The entire process-from steel plate cutting to the shipment of finished goods-is handled in-house without intermediate subcontracting, ensuring consistent delivery and cost control.
Reliable Batch Delivery Capability
Suitable for long-term orders and project-based procurement; supports phased deliveries and scheduled production planning.
Robust Quality System
Implementation of standardized internal inspection procedures ensures that critical dimensions and hole locations meet engineering assembly requirements, with full batch traceability records maintained.
FAQ
Q: What is the difference between a steel flange plate and a standard forged flange?
A: A steel flange plate is a component produced by cutting steel plate, whereas a forged flange is created through a forging process.
Forged Flange: Formed via die forging; suitable for standard dimensions and high-pressure ratings.
Steel Flange Plate: Manufactured via steel plate cutting and CNC machining; suitable for large sizes, non-standard designs, and complex hole patterns.
Different Application Scenarios:
Steel flange plates are better suited for structural components, equipment mounting plates, and non-standard piping systems, rather than standardized high-pressure flange applications.
Q: Can this product serve as a substitute for ASME standard flanges?
A: It cannot be used as a direct, equivalent substitute.
Steel flange plates are primarily used for:
Structural connections
Non-sealing or low-pressure systems
Equipment support and transition connections
Forged flanges must still be used for high-pressure sealing systems (such as ASME B16.5 / B16.47).
Q: How do you ensure the accuracy of hole positioning and installation?
A: Hole position accuracy is guaranteed through CNC machining:
Bolt hole locations are controlled by programming rather than manual layout.
Hole spacing tolerance is controlled within ±0.1mm (via CNC positioning).
Critical installation dimensions undergo secondary verification and inspection.
For large flange plates, a "cutting + CNC drilling" separation process is typically used to prevent thermal deformation from affecting accuracy.
Q: Do you support fully non-standard customization?
A: We fully support non-standard custom production.
Capabilities include:
Any shape or structure (circular, square, or irregular/custom shapes)
Any hole pattern (PCD, eccentric holes, multi-ring hole layouts)
Any combination of thickness and dimensions
Direct production based on customer drawings (DXF / DWG / STEP formats)
Q: What is the Minimum Order Quantity (MOQ)?
A: We employ a flexible MOQ strategy depending on the project:
Standard specifications: Small-batch trial orders supported.
Non-standard products: Usually determined based on project volume.
Engineering orders: Split shipments supported.
Q: What is the typical lead time? Lead times vary based on processing complexity and quantity:
A: Samples / Small batches: Approx. 7–10 days
Standard batch orders: Approx. 15–25 days
Large-scale project orders: Confirmed based on the production schedule
Q: Do you provide material certificates and inspection reports?
A: We provide standard quality documentation support:
Mill Test Certificate (MTC)
Heat Number (traceability)
Dimensional inspection records (by batch)
If required by the project, we can facilitate additional inspections by third-party agencies (SGS, BV, TÜV).
Q: Is the packaging suitable for export via sea freight?
A: Yes, products are packaged according to industrial export standards:
Anti-rust oil / anti-rust film protection
Wooden crates or steel pallets
Compliance with ISPM 15 fumigation standards
We can meet FOB, CIF, and CFR international shipping requirements.
Q: What happens if the received products do not match the drawings?
A: We employ a project-based quality control process:
Random inspections of dimensions and hole locations prior to shipment
Retention of batch production records (traceability)
If manufacturing deviations are confirmed, we will arrange for rework or replacement in accordance with the agreement
Q: Do you have experience with similar projects?
A: We have extensive experience serving the following types of projects:
Structural components for oil and gas pipeline connections
Base connection plates for industrial equipment
Steel structural components for offshore engineering
OEM mechanical structural parts
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