Sanitary & Mini Sanitary

Introduction

There are many different specifications, dimensions and surface finishes for triclamp fittings. Those listed below are the popular fittings, which are stocked as standard fittings by Aflex.

All the alternative fittings can be supplied to special order if the following information can be given;

  • Flange diameter D and Outlet diameter I
  • Hose size if known, or Aflex can recommend a hose size to suit
  • The internal Surface Finish, if it is required to be better than the ASME BPE SF3 surface finish of <0.76µm.Ra = <30µ in Ra non-electropolished.
  • Standard (see below) if known.

Standards

  • ASME BPE
  • DIN 32676 (types A, B and C are available)
  • BS 4825 Pt.3 (equivalent to ASME BPE)
  • ISO 1127

Temperature and Pressure Ratings

  • Pressures up to 16 Bar (230 psi)
  • Temperatures up to 120˚C (250˚F) with EPDM Gaskets
  • Temperatures up to 180˚C (356˚F) with PTFE, Silicone or Viton Gaskets
  • Higher Pressures and Temperatures with Special Clamps and Gaskets.

End Fitting Materials

  • Fittings in AISI 316L = EN 1.4404 = BS 316 S11
  • Ferrules, most in Grade 304 SS, some sizes in Grade 316L SS
  • Fittings for DIN32676 are available in 1.4435 (316L)
  • Fittings in 1.4571, Hastelloy, Monel, PVDF and other materials to special order

Internal Surface Finish Specifications

  • ASME BPE SF3 (mechanical polish, not electropolished) Surface Finish, Maximum reading: <0.76µm Ra = <30µ in. Ra
  • ASME BPE SF4 (mechanical polish and electropolished)Surface Finish, Maximum reading: <0.375µm Ra = <15µ in. Ra(SF4 is the highest level of surface finish specified in ASME BPE, and the standard, stocked fittings listed are all to this finish).
  • DIN 32676 H4 (mechanical polish, not electropolished) Surface Finish, Average reading :<0.4µm Ra = <16µ in. RA. If the standard SF4 finish is not acceptable, H4 must be requested on the enquiry/order.

Note: ASME BPE Triclamp suppliers often quote an ‘Average’ of surface finish reading only, for example ‘average 15 Ra or better’, but this is not in accordance with the stricter ASME BPE requirement that a ‘Maximum’ for individual readings should be complied with.

Mini-Sanitary Triclamp Fittings

Standard Fittings Available:

DIN 32676 SERIES A (DIN)
Nominal Hose Size Flange Diameter D Outlet Diameter I *Fitting Length A
in METRIC DN in mm in mm in mm
1/4 6 0.984 25.0 0.236 6 1.299 33
5/16 8 0.984 25.0 0.315 8 1.654 42
3/8 10 1.339 34.0 0.394 10 1.969 50
1/2 15 1.339 34.0 0.630 16 1.969 50
3/4 20 1.339 34.0 0.787 20 1.969 50
1 25 1.988 50.5 1.024 26 2.283 58
11/2 32 1.988 50.5 1.260 32 2.441 62
11/4 40 1.988 50.5 1.496 38 2.638 67
2 50 2.520 64.0 1.969 50 3.071 78
21/2 65 3.583 91 2.598 66 2.953 75
3 80 4.173 106 3.189 81 3.169 80.5

 

DIN 32676 SERIES B (ISO)
Nominal Hose Size Flange Diameter D Outlet Diameter I *Fitting Length A
in METRIC DN in mm in mm in mm
1/4 10.2 0.984 25.0 0.276 7 1.299 33
5/16 13.5 0.984 25.0 0.406 10.3 1.654 42
3/8 17.2 0.984 25.0 0.551 14 1.969 50
1/2 21.3 1.988 50.5 0.713 18.1 1.969 50
3/4 26.9 1.988 50.5 0.933 23.7 1.969 50
1 33.7 1.988 50.5 1.169 29.7 2.283 58
11/2 42.4 2.520 64.0 1.512 38.4 2.441 62
11/4 78.3 2.520 64.0 1.744 44.3 2.638 67
2 60.3 3.051 77.5 2.217 56.3 3.071 78
21/2 76.1 3.583 91 2.839 72.1 2.953 75
3 88.9 4.173 106 3.319 84.3 3.169 80.5

 

Sanitary Triclamp Fittings

3-A Sanitary Fitting

Standard Fittings Available:

DIN 32676 SERIES C (ASME BPE)
Nominal Hose Size Flange Diameter D Outlet Diameter I *Fitting Length A
in in mm in mm in mm
1/4 0.984 25.0 0.180 4.57 1.299 33
3/8 0.984 25.0 0.305 7.75 1.654 50
1/2 0.984 25.0 0.370 9.4 1.732 50
3/4 0.984 25.0 0.620 15.75 1.969 50
1 1.988 50.5 0.870 22.1 2.283 58
11/2 1.988 50.5 1.370 34.8 2.638 62
2 2.520 64.0 1.870 47.5 3.071 78
21/2 3.051 77.5 2.370 60.2 2.795 75
3 3.583 91 2.870 72.9 3.169 80.5