Titanium and Titanium Alloy Flanges

  • Type: SORF, WNRF, THRRF, BLRF
  • F-2, CP Ti-2, W.Nr 3.7025, AFNOR T35, BS 2TA1, GOST VT1-0 (ВТ1-0)
  • F-5, Ti-6Al-4V, W.Nr 3.7165, AFNOR T-A6V, BS TA10-13, GOST BT6 (VT6)
  • F-7, Ti-0.2Pd, W.Nr 3.7235, BS TA9
  • F-12, Ti-0.3Mo-0.8Ni, W.Nr 3.7105

Features

Titanium and Titanium Alloy Flanges

Chemical Composition (wt.%) of Titanium and Titanium Alloy Flanges

Element F-2 F-5 F-7 F-12
N 0.03 max 0.05 max 0.03 max 0.03 max
C 0.08 max 0.08 max 0.08 max 0.08 max
H 0.015 max 0.015 max 0.015 max 0.015 max
Fe 0.30 max 0.40 max 0.30 max 0.30 max
O 0.25 max 0.20 max 0.25 max 0.25 max
Al 5.5–6.75
V 3.5–4.5
Pd 0.12–0.25
Mo 0.2–0.4
Ni 0.6–0.9
Ti Balance Balance Balance Balance

Mechanical Properties of Titanium and Titanium Alloy Flanges

Grade Tensile Strength
(min, ksi [MPa])
Yield Strength
(0.2% Offset, min, ksi [MPa])
Elongation
in 4D min (%)
Reduction of Area
min (%)
F-2 50 [345] 40 [275] 20 30
F-5 130 [895] 120 [828] 10 25
F-7 50 [345] 40 [275] 20 30
F-12 70 [483] 50 [345] 18 25

Technical Specifications

Specification Value
Standard ASME B16.5, ASME B16.47 Series A & B, EN 1092-1 Titanium and Titanium Alloy Flanges
Grade Grade F-2,  F-5,  F-7, F-12
Density 4.51 g/cm³
Type of Flanges Weld Neck (WN), Slip-on (SO), Socket Weld (SW), Threaded (Thr.), Blind (BL)
Face of Flanges Flat Face (FF), Raised Face(RF), Ring Type Joint (RTJ)
Working Pressure ASME B16.5: 150LBS, 300LBS, 400LBS, 600LBS, 900LBS, 1500LBS, 2500LBS, 3000LBS
ASME B16.47-A: 150LBS, 300LBS, 400LBS, 600LBS, 900LBS
ASME B16.47-B: 75LBS, 150LBS, 300LBS, 400LBS, 600LBS, 900LBS
EN 1092-1: PN6, PN10, PN16, PN25, PN40, PN63/PN100
Dimension NPS 1/8″ – 80″
Surface Process Machined, Polished, Peeled, Rough Turned
Inspection Certificate EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection)
Tests Chemical Analysis, Tensile Test, UT/ET
Type of Flanges

Based on Facing:

  1. Flat Face (FF): This is the most basic type, with a flat surface for gasket contact. It is used in low-pressure applications.
  2. Raised Face (RF): This type features a raised ring around the bolt circle for better gasket sealing and higher pressure capabilities.
  3. Ring-type Joint (RTJ): This type has grooves for metal ring gaskets, creating a very tight seal for high-pressure and high-temperature applications.
  4. Tongue and Groove (T&G): One flange has a raised ring (tongue), while the other has a matching groove for precise alignment and a leak-proof seal.
  5. Male and Female (M&F): Similar to T&G, but with a deeper insertion for even better alignment and sealing.

Based on Connection Type:

  1. Weld Neck (WN): Features a long tapered hub for butt welding to pipes, providing excellent strength and fatigue resistance.
  2. Slip-On (SO): Slides over the pipe and is fillet welded, offering easy installation but lower strength compared to WN.
  3. Socket Weld (SW): Similar to SO but with a socket for inserting the pipe, providing better flow and strength than SO.
  4. Threaded (Threaded): Has threads for connecting to pipes with matching threads, suitable for smaller sizes and lower pressures.
  5. Lap Joint (LJ): Used with stub ends, allowing easy rotation and alignment.
  6. Blind: Used to close off the end of a pipe or vessel, creating a dead end.

Other Types:

  1. Orifice: Has a built-in orifice plate for flow restriction.
  2. Expander: Used to connect pipes of different sizes.
  3. Reducer: Changes the pipe size within a system.
Packing

Packed in plywood boxes or on pallets.

Application

Chemical Processing: ANSI B16.5 flanges are common in chemical plants for connecting pipes carrying various chemicals, while ANSI B16.47 flanges handle larger diameters and higher pressures in specific processes.
Oil & Gas: Both ANSI and EN 1092-1 flanges are crucial in oil and gas exploration, production, and transportation, ensuring the leak-free flow of hydrocarbons. ANSI B16.47 flanges play a crucial role in large-diameter pipelines and high-pressure applications.
Power Generation: Flanges in power plants connect pipes carrying steam, water, and other fluids, with ANSI B16.5 being a common choice for various pressure classes.
Water Treatment: Flanges ensure efficient and safe water distribution and treatment, with both ANSI and EN standards playing a role depending on the specific requirements.
Shipbuilding: EN 1092-1 flanges are commonly used in marine applications thanks to their widespread adoption in Europe and suitability for seawater environments.

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