A component subject to creep is designed in accordance with API 530. The code provides simple methods based on primary membrane and bending for calculating stresses and thicknesses in a cylinder and elbows and says that butt welded ASME B16.9 fittings are acceptable for use with API 530.
There...
Section 1.3 of ASME B16.9 specifies the following:
“Fabricated laterals and other fittings employing circumferential or intersection welds are considered pipe fabrication and are not within the scope of this Standard.”
If two halves of a large tee are forged then welded together with 100%...
I have thermowell that fastens into a blind flange using a 1/2" NPT tapered thread. There is only pressure cycles. No external loads.
The vessel is designed in accordance with ASME VIII Div 1 and the fatigue assessment in accordance with Div 2.
I am trying to find the most labour efficient...
I have a Stainless Steel 304 butt welded (SAW) with a MDMT of -196°C.
The base metal and HAZ are exempt from impact testing per UHA-51(d)(1)(a).
The weld metal is not exempt from impact testing per UHA-51(e). The PQR therefore has impact testing.
For the minimum coupon thickness, QW-403.6...
I have an Ellipsoidal Head with a nozzle in its centre. The nozzle has a Reinforcing Pad with a fillet weld around its outside diameter.
The "effective alternating equivalent" stress at the root of this outer fillet weld is needed (in accordance with Step 3 of 5.5.3.2 of ASME VIII Div 2.), so...
Code Case 2286-4 provides alternative rules for designing cylinders, cones, spheres and heads for external pressure.
The design for an ellipsoidal head has reduced the thickness of a convensionally designed VIII-1 head from 53mm to 41mm.
The code case provides rules for locations and sizes of...
I have drawn many path lines between two points relative to the Global Co-ordinate system. I should have made it relative to a custom local co-ordinate system.
When I now switch the co-ordinate system the lines move to a new location relative to the local co-ordinate system. Is there a way of...
Compress has the option to design an ellipsoidal head to Code Case 2695 (ASME VIII-2 rules). When this option is selected the nozzles attached to the head are also designed to Code Case 2695 (ASME VIII-2 rules).
Is there a way to have the head designed to VIII-1 rules and only an attached...
For time dependent properties, the stress values in ASME II Part D are for up to 100,000 hours only. I need to calculate an allowable stress for 150,0000 hours using the rules in ASME II Part D Mandatory Appendix 1. I have figured out how to derive Minimum and Average Rupture Strength from API...
I have a cold stretched vessel that is to be fabricated from 304 Stainless. The pressure envelope is designed to ASME VIII Div 1 Appendix 44 (Previously Code Case Code Case 2596-1). This allows for using an allowable design stress S of 270MPa (rather than the usual 138MPa for non-Cold...
For an intermediate head in accordance with Fig UW-13.1(e), Section UW-13(c)(1) says:
"...the outside diameter of the head skirt is a close fit inside the overlapping ends
of the adjacent length of cylinder."
Does anyone know if there is a definition for "close fit"?
Shaft tolerance tables...
