F.A.Q.
VAISHNAVI HYDRAULICS PVT. LTD.  |  INDIA  
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Hydraulic Flanges
  • Hydraulic Flanges are connection between hoses or seamless tubes where easy removal is required with in close quarters in the piping systems. Hydraulic Flanges are mainly used for Bigger sizes of tubes in NB (Nominal Bore) sizes.
  • Hydraulic Flanges are used in bigger sizes of Piping joints Where Nut & ferrule assembly is not possible due to higher in Hex section sizes & High torgue require to tighetened / Grip the ferrule in to the tube & lead to loose the joints at High pressure application. In such cases the usage of Flanges with Butt weld or Socket weld has been found to be more practical leading to compact piping installation.
  • Further, the orientation of Hydraulic Flanges joints can be so done to minimize the distance between pipes and provide for a compact installation.
  • CETOP Flanges and ISO 6164 Specify Flanges with Butt weld ends and Square clamping Flanges for 250 bar and 400 bas static working Pressure respectively.
  • These correspond to 160 bar and 315 Bar dynamic Working Pressures. The Flange System consist of a Sleeve to be Butt or Socket Welded to the Pipe and clamped together betwwen two square Flanges by a set of four Hex bolts , Nuts and Spring washers, One of the sleeves carries an O ring groove fitted with an O ring for sealing the interface.
  • The use of ISO 6164 Flanges has one disadvantage, The size of the Square Flange require a higher pitch between pipes due to the Flange Sizes.
  • In order to reduce the distance between pipes, SAE introduced their own Standards which are now incorporated in to ISO 6162 for the 3000 psi and 6000 psi static Pressure ranges respectivelty.
  • SAE system depends on the same set of butt welding sleeves held together by a set of Split Flange and Solid Flange secured by.
  • Hex Bolts and Nut.
  • The design for the SAE System calls for Forged Flanges to ASTM A 105 with Sleeves made from weldable material.
  • In order to reduce costs, various manufacturer have introduced a two piece system where the sleeve & the Flange were combined into one Piece.
  • Such a system is easily adaptable to both Butt Weld and Socket weld Systems.
  • However in practice, the two piece system is used mainly for Socket Weld Flanges for cost considerations.
  • Many a times , with the introduction of more corrosive fluids in piping systems, the total joint is not required to be of non -corrosive material, e.g. - Stainless Steel - SS only the sleeves which are wetted by the fluid are required to be of SS.
  • This makes for an economical Joint.
  • Hydraulic Flanges are available in Steel, Stainless steel - 304, 316, Brass Materials.

  • Hydraulic Flanges STANDARD W.P = PSI. SERIES SIZES IN NB SIZES IN OD IN MM CLICK to submit
    SAE Flanges ISO 61/1SO
    62
    3000 6000 ¼" NB UPTO5"NB Enquiry Form
    CETOP Flanges CETOP RP
    63H 3000
    3000 6000 ¼" NB UPTO5"NB Enquiry Form
    4 Bolt Sqaure Flanges ISO/DIS6164
    3000
    3000 6000 ¼" NB UPTO5"NB Enquiry Form


    SEA flanges CETOP Flanges 4 Bolt Sqaure Flanges


    SAE Flanges
  • SAE Flanges are designed as per SAE J 518 C standards worldwide & VE-LOCK® SAE Flanges can be Interchangeable.
  • The design for the SAE System calls for Forged Flanges to ASTM A 105 with Sleeves made from weldable material.
  • In order to reduce costs, various manufacturer have introduced a two piece system where the sleeve & the Flange were combined into one Piece.
  • Such a system is easily adaptable to both Butt Weld and Socket weld Systems. However in practice, the two piece system is used mainly for Socket Weld Flanges for costconsiderations.
  • SAE Flanges are followed SAE J 518 C Equivalent to ISO 6162 standards for the 3000 psi and 6000 psi static pressure range respectively.
  • SAE system depends on the same set of butt welding sleeves held together by a set of Split Flange and Solid Flange secured by Allen Bolts and Nuts.
  • In order to reduce the distance between pipes, SAE introduced their own Standards which are now incorporated in to ISO 6162 for the 3000 psi and 6000 psi static Pressure ranges respectivelty.
  • SAE system depends on the same set of butt welding sleeves held together by a set of Split Flange and Solid Flange secured by.

  • Pressure Rating
  • The maximum recommended working pressure is indicated for each types given in catalogues Before selecting a Part , Pls take care of W.P. notification All Pressures indications are based on W. Temp. from - 20 degree C to + 90 degree C.
  • The indicated W.P. is refers to only flanges itself.

  • Pressure Ratings
  • For maximum flange pressure ratings, please refer to the tables below and the specific flange catalogue page.
  • Please note that the quoted ratings are foe a working temperature range of between -200 C to +900 C.
  • For use outside of this temperature range please consult the jbj Techniques technical department.


  • Standard Pressure : Serles 3000 psl
    Size Maximum Working Pressure
      PSI BAR
    1/2" 5000 340
    ¾"

    5000

    340
    1" 5000 340
    1 ¼" 4000 275
    1 ½" 3000 200
    2" 3000 200
    2 ½" 2500 175
    3" 2000 135
    3 1/2" 510 35
    4" 510 35
    Hlgh Pressure : Serles 6000 psl
    Size Maximum Working Pressure
      PSI BAR
    3/8" 6000 420
    3/4" 6000 420
    1" 6000 420
    1 1/4" 6000 420
    1 ½" 6000 420
    2" 6000 420
    2 1/2" 6000 420
    3" 6000 420

    Materials Used
  • For every single flange that being manufactured by us will be from Low carbon % for Proper welding Application We can Manufacture SAE Flanges from Various Steel materials like - Steel / Stainless Steel -304 or 316 Grades.

  • Surface Protection
  • For M.s. - we do Black Phosphatised as Surface Protection
  • For S.S. - we do only Buffing on request

  • Bolts Used

    SAE FLANGES METRIC BOLTS DIN 912 -8.8 ( ISO 4762 -8.8) OF
    DIN 912 -10.9 ( ISO 4762 -10.9) *1
    UNC BOLTS ASA B 18.3
    GEAR PUMP FLANGES METRIC BOLTS DIN 912 -8.8 ( ISO 4762 -8.8)
    4 BOLT SQAURE FLANGES METRIC BOLTS DIN 931 / 934 -8.8 ( ISO 4014 /4017 -8.8) OR
    DIN 931 / 934 -10.9 ( ISO 4014 /4017 -10.9) *1
    CETOP FLANGES METRIC BOLTS DIN 931 / 934 -8.8 ( ISO 4014 /4017 -8.8) OR
    DIN 931 / 934 -10.9 ( ISO 4014 /4017 -10.9) *1
    Note - Bolts with Grade 10.9 are to be used when the materials for the flanges is high tempered !!!!!!!

    Sealings

  • All steel SAE Flanges are sealed with O ring .
  • This O rings are Manufactured from NBR or Viton Rubber materials NBR - Shore 90 hardness ( standard) / Viton - 85 -90 Shore Hardness ( Option)





  • SAE Flanges as per SAE J 518C are available in various conncetions as below :-

    SAC Flanges as per I 518 C -6162 ISO CODE W.P. = PSI. SERIES SIZES IN NB SIZES IN OD IN M.N CLICK to Submit
    Split Flanges ISO 61 ISO 62 3000 6000 ¼' NB UP TO 5"NB 15 MM OD UP TO 140 MM OD Enquiry Form
    Mono Flanges, Captive Flanges ISO 61 ISO 62 3000 6000 ¼' NB UP TO 5"NB 15 MM OD UP TO 140 MM OD Enquiry Form
    Threaded Flanges – Male/Female Flanges ISO 61 ISO 62 3000 6000 ¼' NB UP TO 5"NB 15 MM OD UP TO 140 MM OD Enquiry Form
    Socket Weld Flanges ISO 61 ISO 62 3000 6000 ¼' NB UP TO 5"NB 15 MM OD UP TO 140 MM OD Enquiry Form
    Butt Weld Flanges ISO 61 ISO 62 3000 6000 ¼' NB UP TO 5"NB 15 MM OD UP TO 140 MM OD Enquiry Form
    Blind Flanges ISO 61 ISO 62 3000 6000 ¼' NB UP TO 5"NB 15 MM OD UP TO 140 MM OD Enquiry Form
    Weld Nozzle type Swievel Flanges ISO 61 ISO 62 3000 6000 ¼' NB UP TO 5"NB 15 MM OD UP TO 140 MM OD Enquiry Form
    Orifice Flanges ISO 61 ISO 62 3000 6000 ¼' NB UP TO 5"NB 15 MM OD UP TO 140 MM OD Enquiry Form
      ISO 61 ISO 62 3000 6000 ¼' NB UP TO 5"NB 15 MM OD UP TO 140 MM OD Enquiry Form

    Mono Flanges , Captive Flanges , Unsplit Flanges
  • Split Flanges are designed as per ISO 6162 - 3000 psi series & 6000 Psi Series only.
  • Split Flanges are used for Hose assembly where easy removal piping can be possible with in close area Split Flanges are in 2 halves attached with Weld nozzle with Allen bolts , Nuts & O ring Seal.

  • SAE Split Flanges are in MOC - Steel , Stainless Steel SAE Split Flanges are assembled with Weld Nozzles or Mono Flanges or Flat Socket type flanges with Weld Nozzle on both side having O ring Seal groove.
  • SAE Split Flanges are designed as per ISO 6162 with Static Pressure for 3000 psi & 6000 psi Series. Sizes Available - 1/4 " NB up to 5 " NB


  • Mono Flanges , Captive Flanges , Unsplit Flanges
  • Mono Flanges are designed as per ISO 6162 - 3000 psi series & 6000 Psi Series only. Mono Flanges are used for Hose assembly where easy removal piping can be possible with in close area Mono Flanges are in 2 halves attached with Weld nozzle with Allen bolts , Nuts & O ring Seal.
  • SAE Mono Flanges are in MOC - Steel, Stainless Steel SAE Mono Flanges are assembled with Split flanges or Mono Flanges or Flat Socket type flanges with Weld Nozzle on both side having O ring Seal groove.
  • SAE Mono Flanges are designed as per ISO 6162 with Static Pressure for 3000 psi & 6000 psi Series.
  • Sizes Available - 1/4 " NB up to 5 " NB

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    VE-LOCK® Product Warranty
    All VE-LOCK® Brand Make Products Stands for 12 Months Warranty of any defects in material or improper workmanship.The Warranty Stands for Replacements of determined Defective parts only.