Blind Flange with Rubber Gasket Wholesale Guide
Blind flanges with rubber gaskets are essential components for pipeline isolation, pressure testing, and system maintenance. Understanding wholesale pricing, gasket selection, and availability ensures cost-effective procurement.
Blind Flange Overview
Blind flanges are solid discs used to close off pipe ends, valves, or pressure vessels:
Key Features
- Solid construction without center bore
- Thicker than other flange types for pressure containment
- Available in all pressure classes and materials
- Easy installation and removal
Common Applications
- Pipeline end caps
- System isolation during maintenance
- Pressure testing closures
- Future connection points
- Manhole covers
Rubber Gasket Selection
Proper gasket material ensures leak-free sealing:
Gasket Materials
| Material | Temperatur | Anwendungen |
|---|---|---|
| NR (Natural Rubber) | -50 to 80°C | Water, air |
| NBR (Nitrile) | -30 to 100°C | Oil, fuel |
| EPDM | -40 to 150°C | Steam, hot water |
| Viton (FKM) | -20 to 200°C | Chemicals, acids |
| PTFE | -200 to 260°C | Corrosive media |
| Neoprene | -40 to 120°C | Refrigerants |
Gasket Types
- Full Face: Covers entire flange face (FF flanges)
- Flat Ring: Fits raised face (RF flanges)
- Spiral Wound: For high pressure applications
- Ring Type Joint: Metal gaskets for RTJ flanges
DN100 Flansch Lieferant Spezifikationen
DN100 (NPS 4) is one of the most commonly used flange sizes:
ASME B16.5 Klasse 150
- Outside Diameter: 229mm (9.02 inches)
- Bolt Circle: 191mm (7.50 inches)
- Bolt Holes: 8 x 19mm (3/4 inch)
- Flange Thickness: 20.6mm (0.81 inch)
- Gewicht: Ungefähr 3,8 kg
EN 1092-1 PN16
- Außendurchmesser: 220 mm
- Lochkreis: 180mm
- Bolt Holes: 8 x 18mm
- Flanschdicke: 20mm
- Gewicht: Ungefähr 3,5 kg
Raised Face Flange Stockist
Raised face (RF) is the most common flange facing type:
RF Dimensions
- Class 150/300: 1.6mm (1/16 inch) raise
- Class 400 and above: 6.4mm (1/4 inch) raise
- Serrated finish for gasket grip
- Compatible with various gasket types
Stock Availability
- Carbon steel A105: All sizes in stock
- Stainless 304/316: Common sizes available
- Alloy steel: Made to order
- Large diameter: 2-3 weeks lead time
Wholesale and Bulk Order Benefits
Pricing Tiers
| Menge | Rabatt |
|---|---|
| 10-50 Stück | 5-10% |
| 50-100 Stück | 10-15% |
| 100-500 Stück | 15-25% |
| 500+ pieces | 25-35% |
Bulk Order Advantages
- Significant cost savings
- Priority production scheduling
- Free standard packaging
- Flexible payment terms
- Dedicated account manager
Billige Flansche aus Baustahl als Großauftrag
For budget-conscious projects, mild steel flanges offer cost-effective solutions:
Material Options
- Q235: Chinese standard mild steel
- SS400: Japanese mild steel
- S235JR: European mild steel
- A36: American mild steel
Kostenvergleich
- Mild steel: Base price (100%)
- A105 carbon steel: +15-20%
- 304 stainless: +60-80%
- 316 stainless: +100-120%
Flange Fitting for Water Treatment Plant
Water treatment facilities require specific flange configurations:
Common Requirements
- Material: Carbon steel with epoxy coating
- Pressure: PN10 or PN16 sufficient
- Gaskets: EPDM for potable water
- Bolts: Galvanized or stainless
Typical Sizes
- Inlet/Outlet: DN200-DN600
- Process lines: DN80-DN300
- Instrumentation: DN15-DN50
Qualitätssicherung
Standard Testing
- Analyse der chemischen Zusammensetzung
- Mechanical property testing
- Prüfung der Dimensionen
- Visual examination
- Hydrostatic pressure testing
Certifications Available
- ISO 9001:2015
- CE/PED for European export
- SGS/BV third-party inspection
- Material test reports per heat
Delivery and Logistics
- Domestic shipping: 3-7 days
- International: 15-30 days by sea
- Express available for samples
- Container loading optimization
Songhai Flange supplies blind flanges with rubber gaskets at wholesale prices. DN100 and other common sizes in stock with raised face configuration. Contact us for bulk order discounts and fast delivery.
WhatsApp: +86-18658777855
E-Mail: 1007788887@qq.com
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