ASME B16.5 A105 Flange

ASME B16.5 A105 Flange refers to a flange manufactured from A105 material in accordance with the ASME B16.5 standard.

High Quality ASME B16.5 A105 Flange

Size Range: Nominal Pipe Size (NPS) from ½ inch (15 mm) to 24 inches (600 mm).
Pressure Ratings: Classified as Class 150, 300, 600, 900, 1500, and 2500, corresponding to different working pressures (e.g., Class 150 ≈ 20 bar).
Temperature Range: -29°C to 425°C (applicable for A105 material).
Suitable Media: Suitable for non-corrosive media such as water, oil, and gas.

ASME B16.5 A105 Flange Types

The ASME B16.5 standard covers various flange designs, including:

Weld Neck Flange: Preferred for high-pressure systems, connected via welding.
Slip-On Flange: Easy installation, suitable for low-pressure applications.
Blind Flange: Used to seal pipe ends.
Threaded Flange: Connected via threads, eliminating the need for welding.
Lap Joint Flange: Paired with stub ends for easy disassembly.

Material Properties (A105)

Composition: Carbon steel with ≤ 0.35% carbon, ≤ 1.05% manganese, and ≤ 0.35% silicon.
Strength: Tensile strength ≥ 485 MPa, yield strength ≥ 250 MPa.
Applicability: Resistant to high temperatures and pressures but not suitable for highly corrosive media (stainless steel or alloys are required).

Typical Applications

Oil & Gas: Pipelines, refinery equipment.
Chemical Industry: Reactors, high-pressure vessel connections.
Power Engineering: Boilers, steam systems.
General Industry: Water treatment, HVAC systems.

Selection Considerations

Media Compatibility: A105 flanges are unsuitable for acidic or corrosive fluids (e.g., H₂S-containing oil/gas). Consider stainless steel (e.g., A182 F316) or nickel alloys.
Pressure Matching: Select the Class rating based on system pressure, accounting for temperature effects on material strength.
Surface Treatment: Zinc plating or coatings enhance corrosion resistance but may compromise high-temperature performance.

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More Information about ASME B16.5 A105 Flange

Astm a105 covers forged carbon steel piping components for ambient- and higher-temperature service in pressure systems.

Included are flanges, fittings, valves, and similar parts ordered either to dimensions specified by the purchaser or to dimensional standards such as the MSS, ASME, and API specifications.

Forgings made to this specification are limited to a maximum weight of 10 000 lb [4540 kg].

Chemical Requirements

NOTE 1—For each reduction of 0.01 % below the specified carbon maximum (0.35 %), an increase of 0.06 % manganese above the specified maximum (1.05 %)will be permitted up to a maximum of 1.65 %.

Element	Composition,%
Carbon	0.35 max
Manganese	0.60 -1.05
Phosphorus	0.035 max
Sulfur	0.040 max
Silicon	0.10-0.35
Copper	0.40 max【A】
Nickel	0.40 max
Chromium	0.30 max【A.B】
Molybdenum	0.12 max【A.B】
Vanadium	0.08 max【A】

【A 】The sum of copper, nickel, chromium,molybdenum and vanadium shall not exceed 1.00 %.

【B 】The sum of chromium and molybdenum shall not exceed 0.32 %.

Mechanical Requirements

Tensile strength, min, ksi [MPa]【B】	70 [485]
Yield strength, min, ksi [MPa]	36 [250]
Elongation in 2 in. or 50mm, min,%: When standard round 2-in. or 50-mm gauge length or length equal to 4D is used	22
Strip specimens for wall thickness 5/1e in. [7.94 mm] and over and for small sizes tested in full section.	30
Formula for calculatingminelongation for strip specimens thinner than 5/16 in. [7.94 mm]; min % in 2 in. [50 mm]: t = actual thickness Inch-pound units (in.) SI units (mm)	48t+15 1.9t+15
Reduction of area,min, % 【C】	30
Hardness, HBW, max	197
【A】For small forgings, see 8.3.4.
【B】Determined by either the 0.2 % offset method or the 0.5 % extension-under-load method.
【C】For round specimens only.

Pressure–Temperature Ratings for A105

Working Pressures by Classes, bar

Working Pressures by Classes, psig

Working Pressures by Classes, bar

Working Pressures by Classes, psig

ASME B16.5 Comparison with Other Standards

Standard	Scope	Key Features
ASME B16.5	NPS ½”–24″, industrial piping	Versatile, covers multiple pressure classes and flange types.
ASME B16.47	NPS 26″–60″, large-scale piping	Divided into Series A (MSS SP-44) and Series B (API 605).
AWWA C207	Water supply (NPS 4″–144″)	Designed for water systems, lower pressure classes (B–D).
EN 1092-1	European standard (PN 2.5–400)	Metric dimensions, common in European markets.