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Pipe Floor Flange
QS Flange: Pipe Floor Flange
Name: Pipe Floor Flange
Material: Carbon Steel
Standard: ASME B16.5
Pressure: 150LB to 2500LB
Size: 1/2 to 24 Inch
Process Method: Forged
Face: RF
Usage: Commonly Used in Water Systems, Oil and Gas pipelines
Material: Carbon Steel
Standard: ASME B16.5
Pressure: 150LB to 2500LB
Size: 1/2 to 24 Inch
Process Method: Forged
Face: RF
Usage: Commonly Used in Water Systems, Oil and Gas pipelines
Quantity
Pipe Floor Flange is forged from high-quality carbon steel, strictly complying with ASME B16.5 standards. Available in pressure ratings from 150LB to 2500LB and sizes ranging from 1/2"to 24", it features an RF (Raised Face) sealing surface design to ensure superior sealing performance and durability. These Pipe Floor Flange products are widely used in water systems, oil and gas pipelines, and other industrial applications, providing a reliable solution for connecting pipelines to ground fixtures. They combine high strength with cost-effectiveness, meeting the demands of various challenging operating conditions.
1. Corrosion Resistance and Material Selection for Pipe Floor Flange
The corrosion resistance of Pipe Floor Flange directly impacts its service life. Below are key material standards and performance comparisons:
The corrosion resistance of Pipe Floor Flange directly impacts its service life. Below are key material standards and performance comparisons:
- Material Standards:
- ASTM A105 (Carbon steel forgings for normal to high-temperature applications of Flange)
- ASTM A350 LF2 (Low-temperature carbon steel forgings for environments down to -46°C, enhancing the impact toughness of Flange)
- ASTM A105 (Carbon steel forgings for normal to high-temperature applications of Flange)
- ASTM A350 LF2 (Low-temperature carbon steel forgings for environments down to -46°C, enhancing the impact toughness of Flange)
| Parameter | ASTM A105 | ASTM A350 LF2 |
| Tensile Strength (MPa) | ≥485 | ≥485 |
| Yield Strength (MPa) | ≥250 | ≥250 |
| Elongation (%) | ≥22 | ≥22 |
| Impact Toughness (J, -29°C) | — | ≥20 (Charpy V-notch) |
- Corrosion Rate Data (per NACE MR0175):
- In H₂S-containing acidic environments, Pipe Floor Flange must maintain hardness ≤22 HRC to avoid Sulfide Stress Corrosion Cracking (SSCC).
- In freshwater/seawater environments, unprotected Pipe Floor Flange exhibits a corrosion rate of ~0.1–0.5 mm/year, which can be reduced to <0.01 mm/year with proper protection.
- In H₂S-containing acidic environments, Pipe Floor Flange must maintain hardness ≤22 HRC to avoid Sulfide Stress Corrosion Cracking (SSCC).
- In freshwater/seawater environments, unprotected Pipe Floor Flange exhibits a corrosion rate of ~0.1–0.5 mm/year, which can be reduced to <0.01 mm/year with proper protection.
2. Surface Protection Methods for Pipe Floor Flange
To enhance corrosion resistance, the following protection methods are available for Flange:
To enhance corrosion resistance, the following protection methods are available for Flange:
| Protection Method | Technical Parameters | Applicable Environments | Service Life Extension |
| Hot-Dip Galvanizing | Zinc coating ≥85 μm (ASTM A153) | Atmosphere, freshwater, mild chemical media | 15–30 years |
| Epoxy Coating | Dry film thickness ≥200 μm (ISO 12944) | Industrial atmosphere, saltwater splash zones | 20–50 years |
| Polyurethane Spray | Dry film thickness ≥150 μm | High UV exposure, chemically aggressive environments | 10–20 years |
| Cathodic Protection | With sacrificial anodes (e.g., Zn) or impressed current | Buried pipelines, offshore platforms | 50+ years |
- Salt Spray Test Data (ASTM B117):
- Galvanized Pipe Floor Flange: ≥500 hours without red rust (equivalent to 10 years in moderate marine environments).
- Epoxy-coated Pipe Floor Flange: ≥1000 hours without blistering (equivalent to 20 years in industrial areas).
- Galvanized Pipe Floor Flange: ≥500 hours without red rust (equivalent to 10 years in moderate marine environments).
- Epoxy-coated Pipe Floor Flange: ≥1000 hours without blistering (equivalent to 20 years in industrial areas).
3. Temperature Adaptability of Pipe Floor Flange
- High-Temperature Performance (≤425°C):
- Graphitization may occur, but ASTM A105 Pipe Floor Flange retains >90% strength (per ASME B31.3).
- For prolonged high-temperature service, consider alloy steel ASTM A182 F11/F22 flanges.
- High-Temperature Performance (≤425°C):
- Graphitization may occur, but ASTM A105 Pipe Floor Flange retains >90% strength (per ASME B31.3).
- For prolonged high-temperature service, consider alloy steel ASTM A182 F11/F22 flanges.
- Low-Temperature Performance (≥-46°C):
- Pipe Floor Flange made of ASTM A350 LF2 passes -46°C Charpy impact tests (≥20J), preventing brittle fracture.
- For cryogenic applications (e.g., LNG at -162°C), use austenitic stainless steel (A182 F304) or nickel alloys.
- Pipe Floor Flange made of ASTM A350 LF2 passes -46°C Charpy impact tests (≥20J), preventing brittle fracture.
- For cryogenic applications (e.g., LNG at -162°C), use austenitic stainless steel (A182 F304) or nickel alloys.
4. Media Compatibility of Pipe Floor Flange
| Media Type | Corrosion Risk | Recommended Protection |
| Seawater/Brine | Chloride corrosion, pitting | Galvanizing + epoxy coating or 316 stainless steel |
| Acidic Oil/Gas (H₂S/CO₂) | Sulfide Stress Cracking (SSC), Hydrogen-Induced Cracking (HIC) | Hardness ≤22 HRC or NACE MR0103-certified materials |
| High-Temp Steam (>200°C) | Oxidation, scaling | Aluminizing or chrome-molybdenum steel |
5. Service Life Prediction and Selection Guide for Pipe Floor Flange
- Simplified Life Calculation Formula:
[ text{Service Life (years)} = frac{text{Corrosion Allowance (mm)}}{text{Corrosion Rate (mm/year)}} ]
- Example: 3mm allowance + galvanizing (0.01 mm/year) → Theoretical Pipe Floor Flange life ≈300 years (practical design: 20–50 years).
- Simplified Life Calculation Formula:
[ text{Service Life (years)} = frac{text{Corrosion Allowance (mm)}}{text{Corrosion Rate (mm/year)}} ]
- Example: 3mm allowance + galvanizing (0.01 mm/year) → Theoretical Pipe Floor Flange life ≈300 years (practical design: 20–50 years).
- Selection Guidelines:
- Mild Corrosion (e.g., potable water): ASTM A105 Flange + galvanizing.
- Harsh Environments (e.g., offshore): ASTM A350 LF2 Flange + epoxy coating + cathodic protection.
- Mild Corrosion (e.g., potable water): ASTM A105 Flange + galvanizing.
- Harsh Environments (e.g., offshore): ASTM A350 LF2 Flange + epoxy coating + cathodic protection.
Conclusion
With premium carbon steel construction, multi-layer protection options, and broad operational adaptability, Pipe Floor Flange stands as an ideal choice for industrial piping systems. Proper selection and protection significantly extend service life while ensuring reliable performance. Contact our engineering team for custom solutions!
With premium carbon steel construction, multi-layer protection options, and broad operational adaptability, Pipe Floor Flange stands as an ideal choice for industrial piping systems. Proper selection and protection significantly extend service life while ensuring reliable performance. Contact our engineering team for custom solutions!
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