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ASTM B381 Titanium Grade 2 Long Weld Neck Flange Titanium Flange RFWN in Industrial Piping System

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ASTM B381 Titanium Grade 2 Long Weld Neck Flange Titanium Flange RFWN in Industrial Piping System

Brand Name : LHTi

Model Number : Titanium Long Weld Flanges

Certification : ISO9001,CE, API,etc

Place of Origin : Baoji, China

MOQ : 100 pieces

Price : as per your requirement

Payment Terms : L/C, D/A, D/P, T/T, Western Union

Supply Ability : 100-200 Ton/Tons Per Month

Delivery Time : about 7-14 days for delivery

Packaging Details : All goods are packed by seaworth shipment materials or required by buyer

Seal Face : RF, FF, FM, M,RJ

Powder Or Not : Not Powder

Grade : Gr2 Gr7 Gr12 F2 F7 F12

Use : chemical

Material Grade : Commonly Titanium Grade 2

Flange Face Type : Raised Face/Flat Face/Ring Type Joint

Specifications : Complete

Processing Method : Forged, CNC machine

Pressure Rating : 150lbs to 2500lbs

Temperature Range : -250°F to 800°F

Nda Test : UT

Commodity : Flat welded flange /welding plate flange

Types : Weld Neck, Slip On, Blind, Socket Weld, Lap Joint, Threaded, Spectacle Blind, etc.

Production Method : Forged, Die forged

Flange Facing : RF, FF, RTJ

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ASTM B381 Titanium Grade 2 Long Weld Neck Flange Titanium Flange RFWN in Industrial Piping System

Introduction:

The ASTM B381 Titanium Grade 2 Long Weld Neck Flange (RFWN) is a critical component in industrial piping systems, known for its outstanding corrosion resistance, strength, and reliability. Specifically, Titanium Grade 2 is a commercially pure titanium alloy that offers excellent performance in highly corrosive environments such as marine, chemical processing, and aerospace applications. The Long Weld Neck Flange (RFWN) design, combined with the titanium material, ensures superior performance in demanding conditions.

ASTM B381 Titanium Grade 2 Long Weld Neck Flange Titanium Flange RFWN in Industrial Piping System

Specifications of Titanium Long Weld Flanges:

Specification ASTM B381 / ASME SB381
Standard ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS SP44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Size Range 1/2″ (15 NB) to 48″ (1200NB), DN10 ~ DN5000
Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40, Etc.
Connect Type/Flange Face Type Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Small Male-Female (SMF)
JIS Standards JIS B2220, JIS B2221, 5K, 10K, 16K, 20K, 30K, 40K, 63K
DIN Standards DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638, DIN 2673
BS Standards BS 4504, BS 1560, BS 10

Comparison Table of Different Grades:

Property Titanium Grade 2 Titanium Grade 5 Titanium Grade 7 Carbon Steel Stainless Steel
Composition 99% Titanium 90% Titanium, 6% Aluminum, 4% Vanadium 90% Titanium, 6% Aluminum, 2% Palladium Iron + Carbon Iron + Chromium (10-20%) + Nickel
Corrosion Resistance Excellent (especially in chlorides, seawater) Excellent (better high-temperature resistance) Excellent (higher corrosion resistance in acidic environments) Poor (rusts easily in moisture, acids) Excellent (against oxidizing acids, chlorides)
Tensile Strength Moderate High (stronger than Grade 2) Moderate to High Moderate High
Fatigue Resistance Moderate Excellent High Low Good
Temperature Resistance Moderate High (better heat resistance) High (oxidation resistance) Low Moderate
Applications Marine, Chemical, Medical Aerospace, Military, Chemical Processing Chemical Processing (aggressive environments) General Industry, Construction Chemical, Food Processing, Medical
Advantages Corrosion resistance, Weldability Strength, High-performance, Heat resistance Enhanced corrosion resistance, Weldability Cost-effective, Strength Durability, Corrosion resistance
Cost Expensive Expensive Expensive Low Moderate to High

Class 300 Long Weld Neck Flange Dimensions:

Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD RF Dia. RF Height PCD Hub Length No of Bolts Bolt Size UNC Machine Bolt Length RF Stud Length Hole Size ISO Stud Size
A B C D E F G H
1/2 15 95 12.7 38 21.3 34.9 2 66.7 As Required 4 1/2 55 65 5/8 M14
3/4 20 115 14.3 48 26.7 42.9 2 82.6 As Required 4 5/8 65 75 3/4 M16
1 25 125 15.9 54 33.4 50.8 2 88.9 As Required 4 5/8 65 75 3/4 M16
1 1/4 32 135 17.5 64 42.2 63.5 2 98.4 As Required 4 5/8 70 85 3/4 M16
1 1/2 40 155 19.1 70 48.3 73 2 114.3 As Required 4 3/4 75 90 7/8 M20
2 50 165 20.7 84 60.3 92.1 2 127 As Required 8 5/8 75 90 3/4 M16
2 1/2 65 190 23.9 100 73 104.8 2 149.2 As Required 8 3/4 85 100 7/8 M20
3 80 210 27 117 88.9 127 2 168.3 As Required 8 3/4 90 110 7/8 M20
3 1/2 90 230 28.6 133 101.6 139.7 2 184.2 As Required 8 3/4 95 110 7/8 M20
4 100 255 30.2 146 114.3 157.2 2 200 As Required 8 3/4 95 115 7/8 M20
5 125 280 33.4 178 141.3 185.7 2 235 As Required 8 3/4 110 120 7/8 M20
6 150 320 35 206 168.3 215.9 2 269.9 As Required 12 3/4 110 120 7/8 M20
8 200 380 39.7 260 219.1 269.9 2 330.2 As Required 12 7/8 120 140 1 M24
10 250 445 46.1 321 273 323.8 2 387.4 As Required 16 1 140 160 1 1/8 M27
12 300 520 49.3 375 323.8 381 2 450.8 As Required 16 1 1/8 145 170 1 1/4 M30
14 350 585 52.4 425 355.6 412.8 2 514.4 As Required 20 1 1/8 160 180 1 1/4 M30
16 400 650 55.6 483 406.4 469.9 2 571.5 As Required 20 1 1/4 165 190 1 3/8 M33
18 450 710 58.8 533 457 533.4 2 628.6 As Required 24 1 1/4 170 195 1 3/8 M33
20 500 775 62 587 508 584.2 2 685.8 As Required 24 1 1/4 185 205 1 3/8 M33
24 600 915 68.3 702 610 692.2 2 812.8 As Required 24 1 1/2 205 230 1 5/8

Manufacturing Process:

Material Selection: The first step in manufacturing titanium flanges involves selecting high-quality titanium alloys, either Grade 2 or Grade 5, based on the application’s specific requirements. Grade 2 is chosen for its excellent corrosion resistance and weldability, while Grade 5 is selected for higher strength demands.

Forming and Machining: The titanium billets are heated to a high temperature and then formed into flange shapes using techniques like forging or casting. Once the shape is formed, the flange undergoes precision machining to achieve the correct dimensions, including the raised face and bolt holes.

Heat Treatment: Both Grade 2 and Grade 5 titanium alloys may undergo heat treatment processes to enhance their mechanical properties. For Grade 5, this typically involves a solution treatment followed by aging to increase strength.

Surface Finishing: The flange surfaces, especially the raised face, are polished to a smooth finish to improve the sealing surface when paired with gaskets. This step is critical to ensuring leak-tight performance and meeting the required surface finish standards.

Inspection and Testing: Each flange is subjected to rigorous quality control, including visual inspections, dimensional checks, and non-destructive testing such as ultrasonic or X-ray inspection to ensure there are no internal defects. Pressure testing may also be performed to verify the flange’s ability to withstand the specified pressure rating.

Applications of ASTM B381 Titanium Grade 2 Long Weld Neck Flange (RFWN):

The Titanium Grade 2 Long Weld Neck Flange is widely used in a variety of industries where corrosion resistance and strength are crucial. Here are some common applications:

Marine Industry:

  • Titanium’s resistance to seawater corrosion makes it ideal for marine applications such as offshore oil rigs, shipbuilding, and submarine operations.
  • The flange's ability to withstand high-pressure, high-temperature environments in these settings ensures safe and long-lasting connections.

Chemical Processing:

  • Titanium Grade 2 is highly resistant to a wide range of acids and chemicals, including sulfuric acid, chlorine, and nitric acid. It is used in the chemical processing industry for handling aggressive chemicals in piping systems.
  • The Long Weld Neck Flange is particularly useful for high-pressure vessels, reactors, and heat exchangers in these settings.

Aerospace:

  • Titanium is commonly used in the aerospace industry due to its excellent strength-to-weight ratio. Titanium Grade 2 flanges are used in various fuel systems, turbine engines, and hydraulic systems.
  • The weldability and corrosion resistance of titanium ensure long-term durability and reliability in these high-stress, high-temperature environments.

Power Generation:

  • In power plants, especially those dealing with nuclear or chemical processing, Titanium Grade 2 is used for piping systems to ensure durability and minimize the risk of corrosion-related failures.
  • The RFWN design allows for easy installation and maintenance of high-pressure, high-temperature systems.

Medical and Biomedical Applications:

  • Titanium is widely used in the medical field due to its biocompatibility, and Grade 2 is particularly favored for implants, surgical instruments, and medical device manufacturing.
  • The Long Weld Neck Flange provides the necessary strength and corrosion resistance for medical-grade piping systems.

Product Tags:

Industrial Piping System Titanium Flange

      

ASTM B381 Titanium Flange

      

Grade 2 RFWN Titanium Flange

      
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