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304/316 Stainless Steel Non-standard Flange | Custom Size, ASTM A182, Industrial Custom Flange

Categories Stainless Steel Flanges
Brand Name: Yuhao
Model Number: flanges
Certification: ISO, API, BV, CE ...
Place of Origin: China
MOQ: 100KGS
Price: Negotation
Payment Terms: L/C,D/A,D/P,T/T,Western Union,MoneyGram
Supply Ability: 2000tons/per month
Delivery Time: 2-10 work days
Packaging Details: They are usually packed in conventional export wooden cases.
Material: 304, 304L, 316, 316L
Application: Connection, Decoration, oil and gas, Automative, Shipbuilding, Construction
Standard: ASTM, AISI, GB, JIS
Package: Standard Seaworthy Packagel, wooden cases...
Connection: Welding
Pressure: Class150/300/600/9001500/2500
Type: Pipe Fitting
Shape: Round Shape
Size: DN15-DN3000
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304/316 Stainless Steel Non-standard Flange | Custom Size, ASTM A182, Industrial Custom Flange

304/316 Stainless Steel Non-standard Flange | Custom Size, ASTM A182, Industrial Custom Flange



►Product Description

Our 304/316 Stainless Steel Non-standard Flange is a tailored connecting solution engineered to meet unique industrial project requirements that standard flanges cannot fulfill. Crafted from premium 304 and 316 stainless steel, this customizable flange is designed to adapt to non-standard sizes, pressure ratings, shapes, and connection types, providing a perfect fit for special piping systems, equipment interfaces, and harsh operating environments. With our professional engineering team and advanced production capabilities, we transform your specific requirements into high-performance, reliable non-standard flanges that balance corrosion resistance, structural integrity, and practicality.

Unlike standard flanges with fixed specifications, our non-standard stainless steel flanges are fully customizable—from material grade and size to sealing face design, pressure rating, and surface treatment. Whether you need flanges for non-standard pipe diameters, special pressure conditions, or unique installation scenarios, we leverage precision machining and strict quality control to ensure each custom flange meets your exact technical requirements, while adhering to international standards such as ASTM A182 for material and performance reliability.

Key Features & Advantages
  • Fully Customizable Design:Tailor every detail to your project needs, including size (custom DN/OD), thickness, pressure rating (Class 150-Class 2500 / PN6-PN100), sealing face (FF/RF/RTJ/MFM), connection type (weld neck, slip on, threaded, blind), and shape (special-shaped flanges for unique equipment).
  • Dual-Grade Corrosion Resistance:Choose 304 stainless steel for general industrial applications with excellent resistance to non-corrosive media, or 316 stainless steel for harsh environments (chlorides, acids, seawater) with superior pitting, crevice, and stress corrosion resistance.
  • ASTM A182 Standard Compliance:All non-standard flanges are manufactured in line with ASTM A182 standards for material quality and performance, ensuring compatibility with global piping systems and equipment, even for custom specifications.
  • Precision Machining & Quality:Utilize advanced CNC machining technology to ensure precise dimensions, smooth surfaces, and tight tolerances, matching your custom drawings and technical parameters perfectly. Each flange undergoes strict inspection to avoid defects.
  • Adaptability to Harsh Environments:Customizable material grades (304L/316L/321/904L) and surface treatments (passivation, polishing, anti-rust coating) make the flanges suitable for high-temperature, high-pressure, and corrosive industrial environments.
  • Flexible & Efficient Customization:Our professional engineering team provides one-stop customization service—from technical consultation and drawing design to sample production and mass manufacturing—ensuring fast lead times and perfect alignment with your project schedule.
  • High Durability & Reliability:Rugged stainless steel construction and strict quality control ensure the non-standard flanges can withstand heavy loads, repeated use, and extreme operating conditions, minimizing maintenance needs and extending service life.


Applications

Our 304/316 Stainless Steel Non-standard Flanges are widely used in projects with special requirements, including:
  • Custom Industrial Piping Systems (non-standard pipe diameters)
  • Oil & Gas, Petrochemical Projects (special pressure/temperature requirements)
  • Marine & Offshore Platforms (custom-shaped flanges for limited space)
  • Food & Pharmaceutical Industries (custom hygienic flanges)
  • Power Generation (non-standard flanges for special equipment)
  • Heavy Industry (steel plants, mining, fertilizer facilities with unique needs)
  • Custom Equipment Interfaces (matching non-standard machinery connections)


Customization Process & Quality Assurance

1. Consultation & Requirement Confirmation:Our team communicates with you to clarify technical parameters, drawings, material requirements, and project timelines.
2. Drawing Design & Approval:We design detailed drawings based on your requirements, send them to you for approval before production.

3. Sample Production (Optional):We produce samples for your inspection to ensure consistency with your requirements.

4. Mass Production & Quality Control:Using advanced equipment, we manufacture the flanges, with strict inspections at every stage (raw material, machining, surface treatment, leakage test).

5. Delivery & After-Sales Support:Fast delivery with professional packaging, and dedicated after-sales support to solve any usage issues.


Technical Specifications

Material Grades
Customizable: ASTM A182 F304/F304L,
Standards
ASTM A182, ANSI B16.5, EN 1092-1 (customizable to project requirements)
Size Range
Fully customizable: DN15-DN5000 (or custom OD/ID as per drawings)
Thickness
Customizable: 6mm-200mm (as per pressure and project needs)
Pressure Rating
Customizable: Class 150-Class 2500; PN6-PN100 (or higher on request)
Sealing Face
Customizable: FF, RF, RTJ, MFM, or other special designs
Connection Type
Customizable: Weld Neck, Slip On, Threaded, Blind, or special connection
Surface Finish
Customizable: CNC Machined, Polished, Passivated, Anti-Rust Coating


►Product Size

DNPipe ODConnection SizeFlange Thickness(mm)
C
Flagne ID
ABFlange ODBolt Hole Circle DiameterAB
1017.2149060141815
1521.31895651422.519
2026.925105751627.526
2533.732115851634.533
3242.4381401001843.539
4048.3451501101849.546
5060.3571651251961.559
6576.1761851452077.578
8088.9892001602090.591
100114.310822018022116110
125139.713325021022143.5135
150168.315928524024170.5161
200219.121934029524221.5222
25027327339535026276.5276
300323.932544540026328328
350355.637750546028360381
400406.442656551532411430
45045748061556536462485
50050853067062038513.5535
60061063078072542616.5636


►Shot Shoot


►Why Choose Our Non-standard Flange?

  • Professional Customization Capability:Years of experience in non-standard flange production, with a professional engineering team to handle complex requirements and drawings.
  • High-Quality Material & Machining:Premium 304/316 stainless steel and advanced CNC equipment ensure the flanges meet high standards of durability and precision.
  • Flexible & Efficient Service:One-stop customization service, fast lead times, and flexible adjustment according to your project changes.
  • Global Standard Compliance:Adhere to ASTM A182 and other international standards, ensuring compatibility and reliability for global projects.
  • Factory-Direct Pricing:Eliminate middlemen, providing competitive pricing for custom orders, whether small-batch or large-volume.
  • Reliable After-Sales:Professional technical support and after-sales service to ensure the flanges perform well in your project.
Quality 304/316 Stainless Steel Non-standard Flange | Custom Size, ASTM A182, Industrial Custom Flange for sale
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