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Raised Face Carbon Steel Weld Neck Flange LF2 Class 300 ANSI B16.5
  • Raised Face Carbon Steel Weld Neck Flange LF2 Class 300 ANSI B16.5
Raised Face Carbon Steel Weld Neck Flange LF2 Class 300 ANSI B16.5

Raised Face Carbon Steel Weld Neck Flange LF2 Class 300 ANSI B16.5

Place of Origin China
Brand Name Kasugai
Model Number ASTM A350 LF2 ANSI B16.5 WN RF CL300
Document Product Brochure PDF
Product Details
Product Name:
ASTM A350 LF2 ANSI B16.5 WN RF Class 300 Carbon Steel Weld Neck Raised Face Flange
Size Range:
1/2" To 24"
Pressure Class:
300
Standards:
ASTM A350 LF2
Face Type:
WNRF-Weld Neck Raised Face
Specificatoins:
ANSI B16.5
Highlight: 

Carbon Steel Weld Neck Flange

,

Raised Face ANSI B16.5 Flange

,

LF2 Weld Neck Flange

Payment & Shipping Terms
Minimum Order Quantity
Negotiable
Price
Negotiable
Packaging Details
Seaworthy Packng
Delivery Time
30 - 60 working days
Payment Terms
L / C , T / T
Supply Ability
500 ton per month
Product Description

ASTM A350 LF2 ANSI B16.5 WN RF Class 300 Carbon Steel Weld Neck Raised Face Flange

Product Information

Product Name ASTM A350 LF2 ANSI B16.5 WN RF Class 300 Carbon Steel Weld Neck Raised Face Flange
Size Range 1/2” to 24”
Pressure Class Class 300
Standards ASTM A350 LF2
Face Type WNRF-Weld Neck Raised Face
Specification ANSI B16.5
Coating Anti-rust Paint, Could and Hot Dip Galvanized, Zinc Plated, Yellow Transparent, Oil Black Paint

 

ASTM A350

ASTM A350 (ASME SA350) is the standard specification for carbon steel and low alloy steel forged flanges and flanged fittings for low temperature services.

Common use grade is ASTM A350 LF2 Class 1, corresponding material for piping in ASTM A333 Grade 6 and pipe fittings in ASTM A420 WPL6. With yield strength minimum 240 MPa, and tensile strength in 480 MPa to 655 MPa, impact test temperature at -45℃.

 

ASTM A350 Chemical Composition (%)

  Chemical Composition (%)
Grade LF1 Grade LF2 Grade LF3 Grade LF5 Grade LF6 Grade LF9 Grade LF787
C max 0.30 0.30 0.20 0.20~0.35 0.22 0.20 0.07
Mn 0.60~1.35 0.60~1.35 0.90 max 0.60~1.35 1.15~1.50 0.40~1.06 0.40~0.70
P max 0.035 0.035 0.035 0.035 0.025 0.035 0.025
S max 0.04 0.04 0.04 0.04 0.025 0.04 0.025
Si A 0.15~0.3 0.15~0.3 0.20~0.35 0.20~0.35 0.15~0.3 ﹍ 0.40 max
Ni 0.40 max B 0.40 max B 3.30~3.70 1.0~2.0 0.40 max B 1.60~2.4 0.70~1.0
Cr 0.30 max B,C 0.30 max B,C 0.30 max C 0.30 max C 0.30 max B,C 0.30 max C 0.60~0.90
Mo 0.12 max B,C 0.12 max B,C 0.12 max C 0.12 max C 0.12 max B,C 0.12 max C 0.15~0.25
Cu 0.40 max B 0.40 max B 0.40 max 0.40 max 0.40 max B 0.75~1.25 1.0~1.3
Cb 0.02 max D 0.02 max D 0.02 max 0.02 max 0.02 max 0.02 max 0.02 min
V 0.08 max 0.08 max 0.03 max 0.03 max 0.04~0.11 0.03 max 0.03 max
N ﹍ ﹍ ﹍ ﹍ 0.01~0.03 ﹍ ﹍

A When vacuum carbon-deoxidation is required by Supplementary Requirement S4, the silicon content shall be 0.12%

B The sum of copper nickel chromium vanadium and molybdenum shall not exceed 1.00% on heat analysis.

C The sum of chromium and molybdenum shall not exceed 0.32% on heat analysis.

D By agreement, the limit for columbium may be increased up to 0.05% on heat analysis and 0.06% on product analysis

 

Flange Type:Weld Neck Flange (WN)

A weld neck flange, also called a tapered hub flange or high-hub flange, is a kind of flange that can relocate stress to the pipes, ensuring a decrease in high-stress concentration at the bottom of the flange. There are two welding neck flanges designs – the first type is used with pipes while the second, longer type cannot be used with pipes but with a process plant. The weld neck flange comprises of a round fitting that extends beyond the rim of the circumference. These flanges, typically manufactured from forging, are actually welded to pipes.

 

 

Face Type: Raised Face (RF)

The Raised Face flange is the most common type used in process plant applications, and is easily to identify. It is referred to as a raised face because the gasket surfaces are raised above the bolting circle face. This face type allows the use of a wide combination of gasket designs, including flat ring sheet types and metallic composites such as spiral wound and double jacketed types.

 

The purpose of a RF flange is to concentrate more pressure on a smaller gasket area and thereby increase the pressure containment capability of the joint. Diameter and height are in ASME B16.5 defined, by pressure class and diameter. Pressure rating of the flange determines the height of the raised face.

 

ANSI B16.5 Flange Dimensions - Class 300 (mm)

 

Raised Face Carbon Steel Weld Neck Flange LF2 Class 300 ANSI B16.5 0

Nominal Size Outside Dia. Thickness Length thru Hub Dia. of Hub Raised Face Dia. Corner Radius of Bore Depth of Socket Counter Bore Thread Length Bolt Holes
WN

SO

SW

TR

 LJ LJ SW TR Bolt Circle Dia. No Dia.
A B O t Y1 Y2 Y3 X R r1 D B4 Q C H
15 1/2 95 14.3 52.3 22 38.0 35.1 3 10 23.5 15.7 66.5 4 16
20 3/4 117 15.8 57.2 25 48.0 42.9 3 11 29.0 15.7 82.6 4 19
25 1 124 17.6 62.0 27 54.0 50.8 3 13 36.0 17.5 88.9 4 19
32 1-1/4 133 19.1 65.0 27 63.4 63.5 5 14 44.5 20.6 98.6 4 19
40 1-1/2 155 20.6 6.3 30 70.0 73.2 6 16 50.5 22.4 114.3 4 22
50 2 165 22.4 69.8 33 84.0 91.9 8 18 63.5 28.4 127.0 8 19
65 2-/21 190 25.4 76.2 38 100 104.6 8 19 76.0 31.8 149.4 8 22
80 3 210 28.5 79.2 43 117 127.0 10 21 92.0 31.8 168.1 8 22
90 3-1/2 229 30.3 81.0 44 133 139.7 10   105.0 36.6 184.2 8 22
100 4 254 31.8 85.9 48 146 157.2 11   118.0 36.6 200.2 8 22
125 5 279 35.1 98.6 51 178 185.7 11   145.0 42.9 235.0 8 22
150 6 318 36.6 98.6 52 206 215.9 13   171.0 46.0 269.7 12 22
200 8 381 41.2 111.3 62 260 269.7 13   222.0 50.8 330.2 12 26
250 10 444 47.8 117.3 67 95 321 323.8 13   276.0 55.6 387.4 16 29
300 12 520 50.8 130.0 73 102 375 381.0 13   329.0 60.5 450.8 16 32
350 14 585 53.9 142.7 76 111 425 412.8 13   360.0 63.5 514.4 20 32
400 16 650 57.2 146.0 83 121 483 469.9 13   411.0 68.3 571.5 20 35
450 18 710 60.5 158.8 89 130 533 533.4 13   462.0 69.8 628.6 24 35
500 20 775 63.5 162.1 95 140 587 584.2 13   513.0 73.2 685.8 24 35
600 24 915 69.9 168.1 106 152 702 692.2 13   614.0 82.6 812.8 24 42

 

Raised Face Carbon Steel Weld Neck Flange LF2 Class 300 ANSI B16.5 1

Nominal Size Dimensions of Ring Joint Flanges Weight (kg)
Groove Number Dia. of Raised Portion Pitch Dia. Depth Width Radius at Bottom

WN

Sch 40

 SO BL

SW

Sch 40

 LJ TR
A B K P E F r2
15 1/2 R11 51.0 34.14 5.56 7.14 0.8 0.75 0.65 0.65 0.66 0.71 0.65
20 3/4 R13 63.5 42.88 6.35 8.74 0.8 1.27 1.11 1.11 1.14 1.20 1.10
25 1 R16 70.0 50.80 6.35 8.74 0.8 1.64 1.39 1.43 1.43 1.49 1.35
32 1-1/4 R18 79.5 60.32 6.35 8.74 0.8 2.07 1.70 1.83 1.75 1.81 1.69
40 1-1/2 R20 90.5 68.28 6.35 8.74 0.8 2.94 2.51 2.69 2.58 2.66 2.54
50 2 R23 108 82.55 7.92 11.91 0.8 3.45 2.91 3.22 2.97 3.02 2.92
65 2-/21 R26 127 101.60 7.92 11.91 0.8 5.10 4.22 4.86 4.41 4.37 4.24
80 3 R31 147 123.82 7.92 11.91 0.8 6.25 5.88 6.83 6.15 6.04 5.94
90 3-1/2 R34 159 131.78 7.92 11.91 0.8 8.78 7.44 8.85   7.64 7.90
100 4 R37 175 149.22 7.92 11.91 0.8 11.4 9.73 11.8   9.98 9.71
125 5 R41 210 180.98 7.92 11.91 0.8 15.4 12.5 15.8   12.7 12.4
150 6 R45 242 211.12 7.92 11.91 0.8 19.8 16.2 21.3   16.5 16.2
200 8 R49 302 269.88 7.92 11.91 0.8 30.5 24.8 34.6   25.2 24.8
250 10 R53 356 323.85 7.92 11.91 0.8 44.1 35.5 54   40.2 35.9
300 12 R57 413 381.00 7.92 11.91 0.8 64 51 79   58 51.5
350 14 R61 458 419.90 7.92 11.91 0.8 88 70 106   86.2 70.1
400 16 R65 508 469.90 7.92 11.91 0.8 113 90 139   113.4 90.4
450 18 R69 575 533.40 7.92 11.91 0.8 138 109 175   133.8 109.0
500 20 R73 635 584.20 9.52 13.49 1.5 169 135 221   167.8 136.0
600 24 R77 750 692.15 11.13 16.66 1.5 249 204 341   249.5 204.0

 

 

 

Tags:

Welding Neck Flange,

Raised Face Flange,

carbon steel forged flange

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