Stainless Steel Threaded Fittings

Stainless Steel Threaded Tees

A stainless threaded tee is an AISI 304 cast fitting with three female-threaded ends, used to take a third direction of the same size from a stainless line. The corrosion resistance and hygiene of the line are maintained at the branch point too.

It is used for sampling and instrument tappings on process lines, CIP supply branches and dosing lines. It is supplied in 12 sizes from 1/8″ to 4″.

1/8″ – 4″size range (product range)

12 sizessizes in stock

3 × RpISO 7-1 female thread

20 barat −20 … +38 °C (ISO 4144)

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Main Applications

Sampling and instrument tappings on process lines
CIP cleaning supply branches
Dosing and chemical injection points
Pressure gauge and temperature sensor connections
Distribution branches in food lines
Water and air lines in marine environments

Technical Data

Fitting type	Equal tee, all three ends the same size
Product standard	ISO 4144 (manufacturer sheet)
Material	AISI 304 stainless steel (product range)
Production	Investment casting (depending on model)
Thread	ISO 7-1 Rp parallel female thread on all three ends
Sizes	1/8″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″, 3″, 4″ (product range)
Pressure, −20 … +38 °C	20 bar (ISO 4144 Table 2, manufacturer sheet)
Pressure, 100 °C	16.5 bar (ISO 4144 Table 2, manufacturer sheet)
Pressure, 150 °C	15 bar (ISO 4144 Table 2, manufacturer sheet)
AISI 316	Please ask (depending on model)
Branch of a different size	With a tee plus stainless reducing bush
Surface	Stainless, uncoated

Material Options

Part	AISI 304 stainless	AISI 316 stainless	Galvanized malleable iron
Body	AISI 304 (cast equivalent 1.4308 / CF8, depending on model)	AISI 316 (cast equivalent 1.4408 / CF8M), depending on model	Malleable iron EN-GJMB-350-10, galvanized
Surface	Uncoated stainless	Uncoated stainless	Zinc coated
Thread	ISO 7-1 Rp female thread	ISO 7-1 Rp female thread	ISO 7-1 Rp female thread
Pressure rating	20 bar −20…+38 °C (ISO 4144)	20 bar −20…+38 °C (ISO 4144)	25 bar −20…120 °C (EN 10242)
Suitable media	Food, drinking water, mild chemicals	Chloride-containing water, seawater, aggressive chemicals	Cold domestic water, fire water

Which material? At dosing and sampling branches the medium may contain more concentrated chemicals than the main line; an AISI 316 tee should be considered at these points.

Advantages

Hygienic Branch

The uncoated surface stays cleanable at the branch point

Measuring Point

Gauges and sensors connect directly to the tee outlet

12 Sizes

From 1/8″ to 4″

Matches Stainless Lines

Same material as the pipe and other stainless fittings

Construction and Design Features

Three Rp female-threaded ends, branch perpendicular to the main line
Investment-cast body (depending on model)
ISO 4144 pressure-temperature ratings
One-piece body without welding

Send the tee size and quantity; if AISI 316 is needed, we will confirm stock and lead time.

How to Choose?

Measure the main line sizeAll three ends of an equal tee are the same size.
Check the branch sizeIf the branch is smaller, use a tee plus reducing bush.
Assess the medium in the branchConsider grade 316 at dosing and chemical injection points.
Compare pressure with temperatureCompare 20 bar at 38 °C and 15 bar at 150 °C with the line values.