Ductile iron high hub threaded flange, catalog render

The item number sets the type and the size.

Item # DF8-S Questions and answers (7)

Threaded Flanges

Ductile iron high hub flanges for fabricating flanged ductile iron pipe to ANSI/AWWA C115/A21.15: DF 125 lb drilled, TDF 125 lb tapped, HDF 250 lb drilled.

View price list (PDF)

Price list sizes: DF 3 to 64 in., TDF 3 to 54 in., HDF 3 to 48 in.
Fully machined, drilled and faced per ANSI B16.1
See all specifications

Type: DF 125 lb drilled

Size: 8 in.

Made: Import

Listed on the Import Fabricator Products price list. Domestic-content requirement on the job? Ask your regional team.

Coating: Not listed

The catalog does not list a coating: ask your regional team.

Your distributor

SIGMA sells through waterworks distributors. Order with item # DF8-S.

Quote from SIGMA

Job location

Sends your quote list to the right regional team.

Quantity

Download the Fabricator Products catalog

Need help on the job?

Call 800.999.2550 with the flange type and the size.

Anchor and filler flanges Fabricator Products catalog (PDF)

Everything about the 8 in. DF 125 lb drilled flange.

Details, specs, every size and the questions buyers ask. Open what you need.

Product detailsWhat it is, highlights and documents

About SIGMA threaded flanges

SIGMA threaded flanges are ductile iron high hub flanges for fabricating flanged ductile iron pipe in accordance with ANSI/AWWA C115/A21.15. They are fully machined, drilled and faced per ANSI B16.1.

There are three types: 125 lb drilled (DF); 125 lb tapped (TDF), with bolt holes tapped for stud bolts threaded per ANSI B16.1; and extra heavy 250 lb drilled (HDF).

Item numbers come from the Import Fabricator Products price list. Dimensions are in the April 2014 catalog, whose tables cover DF 3 to 64 in., TDF 3 to 48 in. and HDF 3 to 24 in.

Highlights

DF 3 to 64 in., TDF 3 to 54 in., HDF 3 to 48 in. on the price list
Ductile iron high hub flanges
Fully machined, drilled and faced per ANSI B16.1

Documents

Specifications8 in. DF 125 lb drilled flange

8 in. DF 125 lb drilled flange

Item number	DF8-S
Type	DF 125 lb drilled high hub flange
Size	8 in.
Made	Import
Coating	Not listed
Pressure rating	Not listed in the catalog: ask your regional team
Max. deflection
Weight	25 lb
Crate quantity
Catalog page	Page 2 of the Fabricator Products catalog
Price list	Import Fabricator Products, effective 12/9/24

Materials and standards

Material	Ductile iron. The catalog cites ASTM A536 for ductile iron across its fabricator products
Machining	Fully machined, drilled and faced per ANSI B16.1
Fabrication	For ductile iron pipe fabricated in accordance with ANSI/AWWA C115/A21.15
Tapped holes (TDF)	For stud bolts threaded per ANSI B16.1
Not in the catalog	Pressure rating and coating: ask your regional team

Sizes by type

DF, 125 lb drilled	Price list 3 to 64 in.; catalog tables 3 to 64 in.
TDF, 125 lb tapped	Price list 3 to 54 in.; catalog tables 3 to 48 in.
HDF, 250 lb drilled	Price list 3 to 48 in.; catalog tables 3 to 24 in.
Dimensions	R, U, thread length, Q, J, bolt circle, hole or tap size and number of holes, by size, in the April 2014 catalog

Item numbers and weights

Item numbers	Order with the price list number, which ends in -S (DF8-S). The 2014 catalog prints item numbers without the -S: confirm with your regional team that its dimensions match the -S item before you fabricate
Weights	DF and HDF: from the price list. TDF: from the 2014 catalog, 3 to 48 in.; none is listed for TDF 54 in. At 30 to 54 in. the price list's DF weights differ from the catalog's, and the catalog gives DF and TDF the same weight. Treat DF and TDF weights at 30 to 54 in. as estimates: ask your regional team for shipping weights

From the Import Fabricator Products price list (effective 12/9/24) and the Fabricator Products catalog (April 2014), under Documents.

Every size and item number18 sizes of the DF 125 lb drilled flange · Import, Not listed · item numbers

Showing the DF 125 lb drilled flange, Import, Not listed. Item numbers follow the options above. Pick a size to load it.

Threaded flanges: item numbers and weights by size
Size	Item #	Weight
	DF3-S	7 lb
	DF4-S	12 lb
	DF6-S	16 lb
	DF8-S	25 lb
	DF10-S	35 lb
	DF12-S	55 lb
	DF14-S	71 lb
	DF16-S	87 lb
	DF18-S	95 lb
	DF20-S	111 lb
	DF24-S	158 lb
	DF30-S	212 lb
	DF36-S	324 lb
	DF42-S	488 lb
	DF48-S	551 lb
	DF54-S	726 lb
	DF60-S	1055 lb
	DF64-S	1200 lb

DF and HDF weights from the price list; TDF weights from the 2014 catalog. At 30 to 54 in., treat DF and TDF weights as estimates.

Questions and answers7 questions buyers ask about threaded flanges

Where do I find the price?

On SIGMA's price lists. Where an item is on a posted list, the View price list button near the top of this page opens it, and every posted list is on the Price Lists page. SIGMA sells through waterworks distributors, and your distributor sets your price. For contract pricing, ask your regional team.

DF, TDF or HDF?

DF is the 125 lb drilled high hub flange, 3 to 64 in. TDF is the 125 lb high hub flange with bolt holes tapped for stud bolts, 3 to 54 in. HDF is the extra heavy 250 lb drilled high hub flange, 3 to 48 in. Sizes are from the Import Fabricator Products price list.

What are they for?

Fabricating flanged ductile iron pipe in accordance with ANSI/AWWA C115/A21.15. They are fully machined, drilled and faced per ANSI B16.1.

Where are the dimensions?

In the April 2014 Fabricator Products catalog: R, U, thread length, Q, J, bolt circle, hole or tap size and the number of holes. Its tables stop at TDF 48 in. and HDF 24 in.; for larger sizes, ask your regional team.

Which item number do I order?

The price list number, which ends in -S (for example DF8-S). The 2014 catalog prints item numbers without the -S: confirm with your regional team that its dimensions match the -S item before you fabricate.