Fabricated Tee

Related Topics

1 - Matching pipe, 2 - tee branch, 3 - reinforcement pad, 4 - tee header

A fabricated tee is a T-shaped joint with perpendicular header and branch axes, and increased header and/or branch wall thickness. Branch is the pipe element with increased wall thickness welded to the header.

Properties

 

  

Property

Description

Name

Element name. If checked then it shown in 3D view

Branch not perpendicular to header

If checked, branch and header joint angle is not checked and analysis is header as for a slanted stub-in. If not checked, branch and header joint is checked and if it is not equal to 90 degrees, an error is displayed.

Weight

Tee weight (with flanges) without insulation and product. Value set in standards is used, without taking into account the overload factor. Product and insulation weight with corresponding overload factors is calculated automatically based on adjoining pipes

Automatic weight calculation

If selected, tee weight is calculated automatically as total volume of two header and branch cylinders

Longitudinal Weld Joint Efficiency Factor, E

Longitudinal weld joint efficiency factor, E. More...

Manufacturing technology

For ASME B31.1, ASME B31.3, DL/T 5366-2014 seamless pipe will always use Wl=1.0. For electric-welded pipe Wl will be specified from database. More...

When using  GOST 32388-2013, pipe physical properties are taken from different materials databases depending on pipe type (seamless/welded).

Use notes 6,9,10

Should be checked if number of displacement cycles exceeds 200

Meet D1, Note 10 a,c,d,e,f

Use 0.7 factor per note 8

ASME B31J-2017 code requirement

Flanges on tee header

ASME B31J-2017 Note 7 requirement

0 - No flanges

1 - One flange (on the one end of tee header)

2 - Two flanges (on both ends of tee header)

Material

Material from the materials database

Nominal header wall thickness, S

Header wall thickness. START-PROF use this wall thickness to calculate SIF, flexibility factors, Z

Header length, L

Tee header length. Used for more accurate tee weight calculation (see "weight")

Mill tolerance

Mill tolerance at the time of production. More...

Corrosion allowance

Corrosion and wear allowance (working mill tolerance) for wall thickness. More...

Nominal branch wall thickness, Ss

Nominal (actual) branch wall thickness

Branch height, L1 (Hs)

Branch height

Tee height, H

Tee height form header axis to branch end. Tee height = D/2 + branch height

Pad thickness, tr (Sn)

Pad thickness

Pad width, bn

Pad width

 

This is the tee object model that you see in START-PROF:

And this is the real tee model, that is used inside the software. The header and branch pipes have a different wall thickness than the connected pipes. The special flexible springs are added to model the header (2) or branch (1) flexibility if ASME B31J is used. The rigid element always used to remove the "dummy" flexibility of the branch element (3)

Toolbar Access

To insert an element, select the desired node and use the menu option: Insert > Tee > Fabricated Tee

To view properties of an existing element: