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Black Flange Chinese Factory Direct
QS Flange: Black Flange Chinese Factory Direct
Name: Black Flange Chinese Factory Direct
Material: Carbon Steel
Standard: ASME B16.5
Pressure: 150LB to 2500LB
Size: 1/2 to 24 Inch
Process Method: Forged
Surface: Black
Face: RF
Usage: Commonly Used in Garbage disposal system, Water Systems, Oil and Gas pipelines
Price: EXW USD 1 - 99/ pcs
MOQ: 1 pcs
Customization: yes
Delivery time: 7-15 Day
Material: Carbon Steel
Standard: ASME B16.5
Pressure: 150LB to 2500LB
Size: 1/2 to 24 Inch
Process Method: Forged
Surface: Black
Face: RF
Usage: Commonly Used in Garbage disposal system, Water Systems, Oil and Gas pipelines
Price: EXW USD 1 - 99/ pcs
MOQ: 1 pcs
Customization: yes
Delivery time: 7-15 Day
Quantity
When selecting flanges for demanding service conditions, the Black Flange stands out as a workhorse component—particularly when sourced Chinese Factory Direct, which ensures competitive pricing without sacrificing traceability or quality control. Our forged carbon steel Black Flange, manufactured to ASME B16.5, covers pressure classes 150LB through 2500LB and sizes ½ to 24 inches. The black paint finish is not merely cosmetic; it adds a robust anti-corrosion layer for waste-handling, water treatment, and hydrocarbon services.
Sealing integrity is where engineering meets application. For moderate pressures (150LB–900LB), the Raised Face (RF) design uses a flat raised annular surface that compresses a soft or semi-metallic gasket evenly. Bolting force drives the gasket into microscopic surface imperfections, yielding leakage rates ≤0.01%—fully compliant with ASME B16.5. This RF style is ideal for water systems, steam tracing, and general utility pipelines, offering simple assembly and low maintenance.
For high-end duty (1500LB–2500LB), the Ring Type Joint (RTJ) design employs a precision-machined groove that accommodates an oval or octagonal metal ring gasket. Under bolt preload, the ring deforms elastically against the groove walls, creating a pure metal-to-metal interference seal. This design achieves leakage rates ≤0.001%, far exceeding standard requirements, making it indispensable for sour gas, high-pressure oil, and thermal cycling processes.
In practice, RF flanges suit cost-sensitive, low-risk environments, while RTJ flanges are mandatory for critical safety-related systems. Both designs share the same forging pedigree, dimensional accuracy, and short 7–15 day delivery, with 1-piece MOQ and full customization options. By choosing Black Flange* from *Chinese Factory Direct, end-users gain immediate access to certified products without intermediary markups, backed by real-time production visibility. Whether your priority is installation speed or extreme-pressure reliability, this product line delivers predictable, repeatable sealing performance across the entire pressure spectrum—an essential factor for plant integrity and regulatory compliance.
FAQ
1. Q: Can I use the RF Black Flange for 2500LB service?
A: No. RF is rated up to 900LB; for 2500LB, choose the RTJ design.
1. Q: Can I use the RF Black Flange for 2500LB service?
A: No. RF is rated up to 900LB; for 2500LB, choose the RTJ design.
2. Q: Is the black coating suitable for outdoor exposure?
A: It provides moderate corrosion protection; for aggressive environments, we recommend additional epoxy or galvanizing.
A: It provides moderate corrosion protection; for aggressive environments, we recommend additional epoxy or galvanizing.
3. Q: What gasket materials work best with the RF face?
A: Graphite, PTFE, or spiral-wound stainless steel – depending on temperature and fluid.
A: Graphite, PTFE, or spiral-wound stainless steel – depending on temperature and fluid.
4. Q: Do you provide material test certificates for direct factory orders?
A: Yes, EN 10204 3.1 or 3.2 certificates are available upon request.
A: Yes, EN 10204 3.1 or 3.2 certificates are available upon request.
5. Q: Can I order a single piece for trial?
A: Yes, MOQ is 1 piece with no minimum batch restriction.
A: Yes, MOQ is 1 piece with no minimum batch restriction.
6. Q: How do I verify the flange is genuine ASME B16.5 compliant?
A: Each flange is dimensionally inspected and stamped with grade, schedule, and pressure class.
A: Each flange is dimensionally inspected and stamped with grade, schedule, and pressure class.
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