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Type of Flanges
Class & Size Range
Weld Neck Flanges
Slip On Flanges
Socket Weld Flanges
Lap Joint Flanges
Blind Flanges
Threaded Flanges
ASME B 16.47 A
ASME B16.47 B
WN Flange Bore
Figure 8 Blanks
Ring Joint Facing
AWWA Steel Ring
AWWA Steel hub
Approx Weight
Gaskets
Bolts & Nuts
PL Flanges (EN1092.1)
WN Flanges (EN1092.1)
SO Flanges (EN1092.1)
Th Flanges (EN1092.1)
BL Flanges (EN1092.1)
Backing Rings

Gaskets 

Spiral Wound Gasket

     A spiral wound gasket able to compress and seal under various loads and provide sealing capabilities. The gasket generally includes a spiral wound portion and an outer guide ring to limit the compression of the gasket. The spiral winding is formed of interdisposed windings of a metal and an elastomer sealant. The metal winding has a non-planar cross-section to inhibit buckling under compression. The gasket is dimensioned such that the elastomer sealant winding has a width greater than the width of the metal winding which has a width greater than the thickness of the guide ring. In this manner, the sealant is compressed before compression of the metal winding which can be compressed until the outer guide ring is encountered.

RTJ gasket

   Ring joint gaskets are made by forging and heat treatment.Ring joint gaskets are used in oil and the flange, pressure vessels, high-speed joint face, such as high temperature and high pressure valve cover gasket sealed metal.In particular pressure, temperature fluctuations Of the occasion,Ring joint gaskets can still maintain good seal. 
   R-type over ring joint gaskets are commonly divided into an oval or octagonal type.R-ring gaskets are manufactured as API 6A and ASME B16.20-standard. The maximum pressure of Ring joint gaskets is up to 10000 PSI.In the flange of trapezoidal slot, octagonal ring joint gaskets and ring joint gaskets are interchangeable. RX-type ring joint gaskets are applied to enhance the capability of R-ring gasket. BX-type ring joint gaskets are applied to 15000 PSI pressure system. There are many materials and apply to different forms of design and operational requirements, reference material characteristics table.

Insulation Sets

  Insulation sets are often used in petrochemical applications electrically isolate two mating flanges to reduce the likelihood of creating a galvanic cell which would result in corrosion of the flanges and pipework. Insulation sets are also used to prevent the flow of electrostatic charge to reduce sparking in hazardous environments.
 Insulation sets often comprise an insulating gasket and set of two insulation and two steel washers and one insulating sleeve per bolt.

Non-Metallic Flat Gasket
  Item   Standard & Code   Applicable Pressure   Applicable Temperature   Flange Surface
  NBR       -30~110℃   FF, RF
    HG20606-97   PN0.25/0.6/1.0/1.6    
    HG20627-97   PN2.0    
    ANSI B16.21   150LB    
  EPDM       -40~130℃   FF, RF
    HG20606-97   PN0.25/0.6/1.0/1.6    
    HG20627-97   PN2.0    
    ANSI B16.21   150LB    
  Viton       -50~200℃   FF, RF
    HG20606-97   PN0.25/0.6/1.0/1.6    
    HG20627-97   PN2.0    
    ANSI B16.21   150LB    
  Asbestos       As per Grade/Brand   FF, RF
    HG20606-97   PN0.25/0.6/1.0/1.6    
    HG20627-97   PN2.0    
    SH3401-96   PN2.0    
    ANSI B16.21   150LB    
  Non-Asbestos       As per Grade/Brand   FF, RF, MFM, TG
    HG20606-97   PN0.25/0.6/1.0/1.6/2.5/4.0    
    HG20627-97   PN2.0/5.0    
    ANSI B16.21   150/300LB    
  PTFE       -196~260℃   FF, RF, MFM, TG
    HG20606-97   PN0.25/0.6/1.0/1.6/2.5/4.0    
    HG20627-97   PN2.0/5.0    
    ANSI B16.21   150/300LB    
  Flexible Graphite       450℃(max)   RF, MFM, TG
    HG20608-97   PN1.0/1.6/2.5/4.0/6.3    
    HG20629-97   PN2.0/5.0/11.0    
    ANSI B16.21   150/300/600LB    
  PTFE Enveloped       150℃(max)   RF
    HG20607-97   PN0.6/1.0/1.6/2.5/4.0    
    HG20628-97   PN2.0/5.0    
    SH3402-96   PN2.0/5.0    
    ANSI B16.21   150/300LB    
 Spiral Wound Gasket(SWG)          
Type   Standard & Code   Material Winding Strip   Inner Ring   Outer Ring   Filler
  Basic Construction Type   HG20610-97   SS304   SS304   CS   Graphite
  With Inner Metal Ring   HG20631-97   SS304L   SS304L   SS304   PTFE
  With Outer Metal Ring   SH3407-96   SS316   SS316   SS316  
  With Inner & Outer Metal Ring   API601   SS316L   SS316L    
      SS321   SS321    
      INCONEL 600   INCONEL 600    
      INCONEL X750   INCONEL X750    
      INCOLOY 800   INCOLOY 800    
      HASTELLOY C276   HASTELLOY C276    
      MONEL 400   MONEL 400    
      NICKLE 200   NICKLE 200    
Ring Type Joint Gasklet(RTJ)
  Type   Standard & Code   Material     Maximum Hardness(HB)
  Oval Ring Gasket   HG20612-97   Soft Iron           90
  Octagonal Ring Gasket   HG20633-97   Low Carbon Steel   10#         120
    SH3403-96   304SS   0Cr18Ni9         160
    ANSI B16.20   316SS   0Cr17Ni12Mo2         160
      410SS   0Cr13         170




Demensions of spiral wound gasket for  ASME B16.5 flanges according to ASME B16.20

Class 150

           NPS            Inner Ring                       Sealing Element     Outer Ring
             D1             D2                D3            D4
1/2 14.2 19.1 31.8 47.8
3/4 20.6 25.4 39.6 57.2
1 26.9 31.8 47.8 66.8
1 ¼ 38.1 47.8 60.5 76.2
1 ½ 44.5 54.1 69.9 85.9
2 55.6 69.9 85.9 104.9
2 ½ 66.5 82.6 98.6 124
3 81 101.6 120.7 136.7
4 106.4 127 149.4 174.8
5 131.8 155.7 177.8 196.9
6 157.2 182.6 209.6 222.3
8 215.9 233.4 263.7 279.4
10 268.2 287.3 317.5 339.9
12 317.5 339.9 374.7 409.7
14 349.3 371.6 406.4 450.9
16 400.1 422.4 463.6 514.4
18 449.3 474.7 527.1 549.4
20 500.1 525.5 577.9 606.6
24 603.3 628.7 685.8 717.6

Class 300

           NPS            Inner Ring                      Sealing Element      Outer Ring
               D1            D2                D3            D4
1/2 14.2 19.1 31.8 54.1
3/4 20.6 25.4 39.6 66.8
1 26.9 31.8 47.8 73.2
1 ¼ 38.1 47.8 60.5 82.6
1 ½ 44.5 54.1 69.9 95.3
2 55.6 69.9 85.9 111.3
2 ½ 66.5 82.6 98.6 130.3
3 81 101.6 120.7 149.4
4 106.4 127 149.4 181.1
5 131.8 155.7 177.8 215.9
6 157.2 182.6 209.6 251
8 215.9 233.4 263.7 308.1
10 268.2 287.3 317.5 362
12 317.5 339.9 374.7 422.4
14 349.3 371.6 406.4 485.9
16 400.1 422.4 463.6 539.8
18 449.3 474.7 527.1 596.9
20 500.1 525.6 577.9 654.1
24 603.3 628.7 685.8 774.7

Class 400

          NPS          Inner Ring                     Sealing Element      Outer Ring
             D1            D2               D3            D4
1/2 14.2 19.1 31.8 54.1
3/4 20.6 25.4 39.6 66.8
1 26.9 31.8 47.8 73.2
1 ¼ 38.1 47.8 60.5 82.6
1 ½ 44.5 54.1 69.9 95.3
2 55.6 69.9 85.9 111.3
2 ½ 66.5 82.6 98.6 130.3
3 81 101.6 120.7 149.4
4 102.6 120.7 149.4 177.8
5 128.3 147.6 177.8 212.9
6 154.9 174.8 209.6 247.7
8 205.7 225.6 263.7 304.8
10 255.3 274.6 317.5 358.9
12 307.3 327.2 374.7 419.1
14 342.9 362 406.4 482.6
16 389.9 412.8 463.6 536.7
18 438.2 469.9 527.1 593.9
20 489 520.7 577.9 647.7
24 590.6 628.7 685.8 768.4

Class 600
          NPS        Inner Ring                      Sealing Element    Outer Ring
             D1            D2                D3            D4
1/2 14.2 19.1 31.8 54.1
3/4 20.6 25.4 39.6 66.8
1 26.9 31.8 47.8 73.2
1 ¼ 38.1 47.8 60.5 82.6
1 ½ 44.5 54.1 69.9 95.3
2 55.6 69.9 85.9 111.3
2 ½ 66.5 82.6 98.6 130.3
3 78.7 101.6 120.7 149.4
4 102.6 120.7 149.4 193.8
5 128.3 147.6 177.8 241.3
6 154.9 174.8 209.6 266.7
8 205.7 225.6 263.7 320.8
10 255.3 274.6 317.5 400.1
12 307.3 327.2 374.7 457.2
14 342.9 362 406.4 492.3
16 389.9 412.8 463.6 565.2
18 438.2 469.9 527.1 612.9
20 489 520.7 577.9 682.8
24 590.6 628.7 685.8 790.7

Class 900

       NPS           Inner Ring                    Sealing Element     Outer Ring
             D1            D2                D3            D4
1/2 14.2 19.1 31.8 63.5
3/4 20.6 25.4 39.6 69.9
1 26.9 31.8 47.8 79.5
1 ¼ 33.3 39.6 60.5 88.9
1 ½ 41.4 47.8 69.9 98.6
2 52.3 58.7 85.9 143
2 ½ 63.5 69.9 98.6 165.1
3 78.7 95.3 120.7 168.4
4 102.6 120.7 149.4 206.5
5 128.3 147.6 177.8 247.7
6 154.9 174.8 209.6 289.1
8 196.9 222.3 257.3 358.9
10 246.1 276.4 311.2 435.1
12 292.1 323.9 368.3 498.6
14 320.8 355.6 400.1 520.7
16 374.7 412.8 457.2 574.8
18 425.5 463.6 520.7 638.3
20 482.6 520.7 571.5 698.5
24 590.6 628.7 679.5 838.2

Class 1500
       NPS         Inner Ring                   Sealing Element     Outer Ring
             D1             D2               D3           D4
1/2 14.2 19.1 31.8 63.5
3/4 20.6 25.4 39.6 69.9
1 26.9 31.8 47.8 79.5
1 ¼ 33.3 39.6 60.5 88.9
1 ½ 41.4 47.8 69.9 98.6
2 52.3 58.7 85.9 143
2 ½ 63.5 69.9 98.6 165.1
3 78.7 92.2 120.7 174.8
4 97.8 117.6 149.4 209.6
5 124.5 143 177.8 254
6 147.3 171.5 209.6 282.7
8 196.9 215.9 257.3 352.6
10 246.1 266.7 311.2 435.1
12 292.1 323.9 368.3 520.7
14 320.8 362 400.1 577.9
16 374.7 406.4 457.2 641.4
18 425.5 463.6 520.7 704.9
20 476.3 514.4 571.5 755.7
24 577.9 616 679.5 901.7
Class 2500
         NPS          Inner Ring                   Sealing Element       Outer Ring
             D1           D2               D3            D4
1/2 14.2 19.1 31.8 69.9
3/4 20.6 25.4 39.6 76.2
1 26.9 31.8 47.8 85.9
1 ¼ 33.3 39.6 60.5 104.9
1 ½ 41.4 47.8 69.9 117.6
2 52.3 58.7 85.9 146
2 ½ 63.5 69.9 98.6 168.4
3 78.7 92.2 120.7 196.9
4 97.8 117.6 149.4 235
5 124.5 143 177.8 279.4
6 147.3 171.5 209.6 317.5
8 196.9 215.9 257.3 387.4
10 246.1 270 311.2 476.3
12 292.1 317.5 368.3 549.4

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