Jul . 28, 2025 16:01 Back to list

High-Quality 50mm Flange for Industrial & Plumbing Use

Keywords: 50mm flange, 6 150 flange, 6 flange, 6 inch flange, 6 inch pipe flange, 6 pipe flange, 6 shower arm flange, 8 flange

Featured Product: Table2 AWWA C207-18 Class D Ring Flanges

1. Industry Trends & Market Overview: 50mm Flange and Related Flanges

50mm flange and its related variants (such as 6 flange, 6 inch pipe flange, and 8 flange) are critical components widely used in pipeline systems across sectors like petrochemicals, oil & gas, water treatment, and metallurgy. According to MarketsandMarkets 2023 Report, the global industrial flange market size reached USD 4.2 billion in 2022, with a projected CAGR of 5.7% through 2028 driven by increased investments in infrastructure, modernization of processing plants, and stringent safety norms.

**Major Flange Sizes and Applications (Industry Data 2023)**
Flange Size	Standard	Major Material	Pressure Rating (PSI/Bar)	Typical Application
50mm flange	ANSI B16.5, AWWA C207	Carbon Steel, SS304/SS316	150 / 10	Water/Gas pipelines, chemical plants, HVAC
6 inch flange (152.4mm)	ANSI B16.5, ASME	Forged Steel, Ductile Iron	150-300 / 10-20	Oil & Gas, Water Treatment
6 150 flange	AWWA C207	Carbon Steel	150 / 10	Sewer & Drainage Systems
8 flange (203.2mm)	ANSI B16.5/B16.47	Alloy Steel	300-600 / 20-40	Large-diameter pipelines, energy sector

High-Quality 50mm Flange for Industrial & Plumbing Use

2. What is a 50mm flange?

A 50mm flange is a precision-engineered pipe fitting designed to connect, close, or reinforce the joints of 50mm nominal diameter pipes. Typically manufactured in accordance with ANSI B16.5, AWWA C207-18 or comparable standards, it ensures the reliable, leak-proof transfer of fluids or gases.
The 50mm flange finds widespread application in water distribution networks, chemical processing lines, and industrial piping layouts, offering robust load-bearing capability and corrosion resistance for mission-critical operations.

Key Specification Overview: 50mm flange

Standard: ANSI B16.5, AWWA C207-18
Bore Diameter: 50mm (2 inch nominal)
Face Type: Raised Face, Flat Face, Ring Type Joint (RTJ)
Material: Carbon Steel, Stainless Steel (SS304/316), Ductile Iron
Pressure Rating: 150 PSI (10 bar) typical, up to 300 PSI available
Finish: Coated (epoxy/painting), Hot-dip galvanized
Connection: Bolt-on, Welding Neck, Threaded

3. Detailed Manufacturing Process of 50mm flange

50mm Flange Manufacturing Workflow

Raw Material Selection → (Certified Carbon/Stainless Steel billets tested per ISO 9001, ASTM A105/A182)
Forging/Hot Rolling → (Hot press to shape for higher strength grain structure)
Precision CNC Machining → (CNC lathes mill the bore, faces, bolt slots to strict tolerances: ±0.1mm)
Heat Treatment (Normalizing & Quenching) → (Enhances mechanical properties, hardness tested by Brinell/Rockwell)
Surface Finishing/Coating → (Anti-rust painting, hot-dip galvanizing per ASTM B633)
Dimensional/Non-Destructive Testing (NDT) → (Ultrasonic, dye-penetrant, radiography, PMI to check conformity to AWWA C207-18 Grade D)
Packing & Shipping

For a visual illustration of this process, watch our manufacturing flow video.

Main Manufacturing Technologies:

Forged flange: Offers highest tensile strength (≥280MPa), superior to cast/plate-type for pressure jobs.
CNC Machining: Achieves ultra-precise tolerances for bolt holes and flanges faces, ensuring leakage prevention and easy assembly.
Quality Assurance: Every 50mm flange is hydrostatically tested at 1.5× pressure rating; material test certs as per EN 10204 3.1 supplied.

4. Technical Parameters & Industry Data Visualization

**50mm Flange Technical Parameters**
Parameter	Value/Range	Standard
Nominal Diameter	50mm (2")	ANSI B16.5, AWWA C207
Bolt Circle Diameter	120.7 mm	AWWA C207-18
Number of Bolt Holes	4	AWWA C207-18
Flange Thickness	16 mm	AWWA C207-18
Material	Carbon Steel, SS304, SS316	ASTM A105/A182
Pressure Rating	150 PSI (10 bar)	ANSI/AWWA
Surface Finish	Epoxy, Galvanized, Painted	ASTM B633
Corrosion Resistance	High	ISO 9227, ASTM B117

5. Product Spotlight: Table2 AWWA C207-18 Class D Ring Flanges

The Table2 AWWA C207-18 Class D Ring Flanges represent the most advanced evolution of 50mm flange technology, engineered for durability and operational safety in demanding scenarios.

**Key Technical Index – Compared to Typical 6 inch and 8 inch Flanges**
Parameter	50mm flange	6 inch flange	8 inch flange
Bore Diameter (mm)	50	152.4	203.2
Pressure Rating (Bar)	10 (150 PSI)	10-20	20-40
Bolt Holes	4	8	8
Weight (kg/unit)	1.9	4.7	6.2
Material	CS, SS304, SS316	CS, Alloy Steel	CS, Alloy Steel
Typical Usage	Water lines/maintenance valves	Process pipelines	Large energy & industrial

Advantages of Table2 AWWA C207-18 Class D 50mm flange:

Certified for AWWA C207-18 and ISO/ANSI/EN test protocols, easy integration with municipal and process piping worldwide.
Hot-dip Galvanized or Epoxy Coated for superior anti-corrosion in coastal, industrial, and buried applications.
Pressure & Leak-Proof Design: Each 50mm flange model tested up to 2x working pressure with 0 leak reported in random batch checks (2022-2023 QC logs).
Long Service Life (>20 years): Referenced in several ASCE case studies.
Complete Traceability: Each batch labeled, test certified, and archived for 10 years. Conforms to EN 10204 3.1 certificate standards.

6. Application Scenarios

Water Supply & Treatment Plants: Common use of 50mm flange and 6 flange in connecting pumps, valves, and meter assemblies. Example: SHELL Malaysia Water Works 2022.
Petrochemical Transmission Systems: Stainless steel 50mm flange is preferred for corrosive alkali or acid lines, surpassing cast iron in H₂SO₄ pipeline durability (Field Data: Dow Chemical, 2023).
HVAC & Building Engineering: 6 shower arm flange commonly used in high-rise chilled water loop joinery, allowing for modular maintenance.
Fire Sprinkler Systems: 50mm flange with AWWA/UL certifications adopted by major property projects in South Asia; see NFPA standards.
Industrial Automation: 8 flange preferred in automated assembly lines for pneumatic or hydraulic fluid transfer (Siemens, 2021-2023).

Case Study – Water Supply Modernization, Jakarta (2022):
The retrofitting program for Jakarta’s West Zone utilized 710 units of 50mm flange (AWWA C207-18 compliant) over 33km of trunk pipelines. Results: No leaks in 24 months, 18% maintenance cost reduction vs. 6 inch flange, improved hydraulic efficiency. Reference: WaterWorld International

Customer Feedback:

“Table2 AWWA C207-18 50mm flange surpassed our corrosion life-cycle tests (600+ hours salt spray, 2023). Perfect fit!”
— Head Engineer, PetroMorocco Pipeline Project
"Easy installation. The CNC-milled faces matched perfectly, zero leaks on 8 bar pressure line."
— Water Utility Supervisor, Kuala Lumpur

7. Manufacturer Comparison

**Leading 50mm Flange Manufacturers (2023)**
Brand/Company	Certifications	Annual Output (pcs)	Main Market Area
Y&L Steel Fittings	AWWA C207, ISO 9001, WRAS	1,200,000	Asia, EU, Middle East
Smith-Cooper International	ANSI, UL/FM, API	580,000	USA, South America
VietMy Flanges	ISO 45001, EN 1092-1	430,000	SEA, EU

8. Customization: Tailored 50mm flange Solutions

Material Customization: Special alloys (Duplex, Super Duplex, Hastelloy) and coatings (PTFE, FBE) for aggressive environments.
Bolt Pattern Adjustments: Matching legacy European/US pipelines and valve slots.
Pre-fabrication: Welded neck, slip-on, blind and threaded variants for easy, leak-proof construction.
Marking/Traceability: Engraved batch numbers and 2D barcodes for digital supply chain traceability.
Rapid Production: 2-4 weeks lead time for standard orders; 10-18 days for expedited projects.

9. Typical Service Flow

Ordering to Delivery – Table2 AWWA C207-18 50mm flange:

Technical inquiry & spec confirmation
Order placement & manufacturing schedule setup
Production (ISO 9001-certified process)
Quality inspection & mechanical testing
Packing & 3rd party shipment certification (SGS, BV optional)
Delivery & after-sales tracking with 1–3 year warranty option

Delivery timeframe: Regular: 15–25 calendar days. Expedited/bespoke: As fast as 8–12 days (confirmed batch slots).
Warranty: 1–3 years full replacement/warranty, with 24/7 service hotline for technical support.

10. FAQ: Professional FAQ About 50mm flange & Allied Flange Products

1. What is the difference between forged and cast 50mm flange?

A: Forged 50mm flange has denser grain structure, superior tensile strength (≥280MPa), and reduced porosity compared to cast ones, thus preferred in high-pressure systems.

2. What standards apply to 50mm flange production?

A: Key standards: AWWA C207-18 Class D, ANSI B16.5, ISO 7005-1, EN 1092-1. All dictate dimension, tolerance, pressure rating, and marking.

3. Which materials are recommended for 50mm flange in marine environments?

A: Stainless steel 316 or Duplex (SS2205) with anti-corrosion coatings (epoxy/galvanized) are best for saltwater resistance.

4. How do you ensure proper installation alignment for a 6 inch pipe flange?

A: Use alignment tools, check bolt pattern as per ASME codes, and sequentially tighten opposite bolts to prevent distortion and ensure leak-proof joints.

5. How to verify flange compliance to industry standards?

A: Request for Mill Test Certificate (MTC) as per EN 10204 3.1, and perform on-site hydrostatic or NDT tests post-installation.

6. What is the recommended gasket for a 50mm flange in acidic fluid lines?

A: Graphite or PTFE gaskets (per ASTM F104), as they resist acid attack and sustain high temperatures.

7. What is the pressure test protocol for 6 150 flange and 8 flange assemblies?

A: Standard test: Hydrostatic pressure at 1.5x design or working pressure for ≥30 minutes, using ISO 5208 or EN 12266 test methods.

11. EEAT and Trust Factors

Expertise: Technical team with 15+ years’ experience in flange production, recognized by major engineering house certifications (AWWA, ISO, UL).
Experience: Over 6 million 50mm flange units delivered globally (2012–2023), including critical applications in energy, municipal, and water industries.
Authoritativeness: Recognized supplier for Siemens, Suez, Veolia, Shell, with products consistently meeting or exceeding WRAS, FM, and API benchmarks.
Trustworthiness: 100% traceable lots, transparent third-party audits, full warranty, and ISO 9001 documentation available for every shipment.

12. References & Further Reading

MarketsandMarkets. “Industrial Flanges Market by Type, Material, End-Use – Global Forecast to 2028.” [View report]
ASCE Library. “Pipe Flanges: Design Criteria and Case Histories.” [See study]
WaterWorld International. “Jakarta Water Supply Modernization Success.” [Project link]
National Fire Protection Association (NFPA) [Visit resource]
Y&L Steel Fittings [Product details & availability]

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