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Flange Adapters.

For crews, distributors and engineers joining pipe to a flange.

✓  Adapters 2 to 36 in.         ✓  DI, steel, PVC and HDPE pipe
✓  SFUP: UL listed, FM approved sizes

Which flange adapter does your joint need?

SFUP and SFA restrain plain-end pipe at a flange; ZIP FLANGE sets on with set screws. Threaded flanges are primarily used by flange fabricators. Anchor and filler flanges are commonly used by distributors and contractors for field applications and assembly.

Sizes depend on the pipe: check each card, or ask your regional team.

Looking for flanged fittings? See C110 flanged fittings under Ductile Iron Fittings.

Pipe:
Pipe size:
SIGMAFlange Universal SFUP joining PVC pipe to a flanged fitting, catalog render

SIGMAFlange Universal (SFUP)

A joint pack for plain-end pipe: adapter ring, ONE-LOK SLGU wedge-action gland, gasket and bolts. For 3 in. on steel, C909 PVC or HDPE, ask your regional team.

Ductile iron 3 to 36 in. · C900 PVC 4 to 36 in. · steel and IPS PVC 3 to 12 in.

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SIGMAFlange Adapter SFA12, red flange-by-MJ sleeve

SIGMAFlange Adapter (SFA)

A flange-by-MJ sleeve, restrained with a ONE-LOK SLDE gland on ductile iron pipe or SLCE on PVC pipe. Also sold packed with the gland; flange bolts not included.

Ductile iron 3 to 36 in. · PVC 4 to 36 in. · steel: ask your regional team

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ZIP FLANGE with its set screws, catalog render

ZIP FLANGE

A set-screw flange that goes on plain-end ductile iron or steel pipe in the field. Not for plain-end fittings.

2 to 12 in.

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Ductile iron high hub threaded flange, catalog render

Threaded flanges

Ductile iron high hub flanges for fabricating flanged ductile iron pipe: 125 lb drilled (DF), 125 lb tapped (TDF) and 250 lb drilled (HDF).

Price list: 3 to 64 in.

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Anchor flange and filler flange, catalog drawings

Anchor and filler flanges

Ductile iron anchor flanges (AF), and cast iron filler flanges (FF) in four thicknesses from 1-1/4 to 4-1/4 in.

Price list: anchor 3 to 60 in. · filler 3 to 24 in.

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Catalogs, sheets and price lists.

One row per product. Every PDF is dated; where a price list runs past an older catalog, the table says so.

Import Restraint Products

Price list for SFUP, SFA and ZIP FLANGE. Effective 12/9/24, rev. 4/14/26

Import Fabricator Products

Price list for threaded, anchor and filler flanges. Effective 12/9/24

Product Documents What it is Pipe Sizes

SIGMAFlange Universal (SFUP)

Flange adapter pack with wedge-action gland

Ductile iron 3 to 36 in.; C900 PVC 4 to 36 in.; steel and IPS PVC 3 to 12 in.; C909 PVC and HDPE: ask your regional team

3 to 36 in.

SIGMAFlange Adapter (SFA)

Flange-by-MJ sleeve, used with ONE-LOK SLDE or SLCE

Ductile iron 3 to 36 in.; PVC 4 to 36 in. per the submittal, plus a 3 in. PVC pack (SFACP3) in the catalog and price list; steel: ask your regional team

3 to 36 in.

ZIP FLANGE

Set-screw flange, installed in the field

Ductile iron (ZF2-C, cast iron OD), steel (ZF2-S)

2 to 12 in.

Threaded flanges

Fabricator catalog (PDF) Apr 2014
Its tables stop at TDF 48 in. and HDF 24 in.

High hub flanges: DF 125 lb drilled, TDF 125 lb tapped, HDF 250 lb drilled

Ductile iron, fabricated to AWWA C115

Price list: DF 3 to 64 in.; TDF 3 to 54 in.; HDF 3 to 48 in.

Anchor and filler flanges

Fabricator catalog (PDF) Apr 2014
Its tables stop at AF 48 in. and FF 12 in.

Ductile iron anchor flanges (AF); cast iron filler flanges (FF) in four thicknesses

Ductile iron

Price list: AF 3 to 60 in.; FF 3 to 24 in.

From the spec to the trench.

The engineer names the adapter and its rating in the spec. The distributor supplies it with the flanged fitting or valve it meets. The crew makes up the joint at the flange.

SFUP restraint gland with blue break-off bolts on a pipe end, from SIGMA's installation video.

2:1

Safety factor in the SFUP catalog and submittal specifications.

350 psi

SFUP rating on ductile iron pipe from 3 to 16 in., per its catalog. Ratings drop at larger sizes and vary by pipe.

UL · FM

SFUP is UL listed from 3 to 12 in. on ductile iron and steel pipe, and FM approved on C900 PVC pipe from 4 to 12 in. and on IPS PVC at 3 in.

Figures from the SFUP catalog (May 2024 edition) and submittal (September 2026). Ratings by pipe and size are in the PDFs.

Questions about flange adapters.

Short answers. The SFUP page has the detail.

It joins plain-end pipe to a flanged fitting, valve or pipe, with no threaded or welded flange on the pipe. The SFUP and the SFA, also called restrained flange adapters, restrain the pipe end with a ONE-LOK wedge-action gland.

Have the spec in hand?

Your regional team can match it to the right model and size.