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.
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 |
Use ASME B31J-2017 code requirement (8) |
Branch wall thickness, Tb |
Nominal (actual) branch wall thickness. For ASME B31J-2017 it is effective branch wall thickness Tb=t' according to the note (8), see above |
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... |
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 |
Refresh SIF and k using FEA |
|
SIF |
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)
To insert an element, select the desired node and use the menu option: Insert > Tee > Fabricated Tee
To view properties of an existing element:
Double-click the element in the 3D view
Select the element and press the toolbar icon