Probably final post of the topic, to
Mike,
Sorry for the inconvenience, I will restate again.
Regarding flange design loads, I agree with you. But i am concerned about compression bolt design i.e., in case of usual Apdx 2 flange, bolt load & flange load are same. Will it be applicable to...
Thank you all for your comment and suggestions.
Few doubts & comments as below:
Is my consideration that flange needs to pressed / clamped for min load as per Apdx 2-5 calculations is correct? OR it is overly conservative?
Is my consideration that COMPLETE flange clamping force calculated as...
@Mike & saplanti
I really appreciate for your time & detailed reply.
Mike,
From your reply, It seems like our perception of split ring is same, if not please refer link: https://files.engineering.com/getfile.aspx?folder=4cce7bd2-badb-40c1-8915-7542e78afd7e&file=Split_ring.JPG
It is simply...
I have been assigned with the task to design the closure (refer attachment) to comply with ASME Sec VIII Div 1. In this closure assembly, compression bolt engaged in split ring tapping along with split ring ensures the required sealing force.
Design conditions are
Material: SS316, temp: 300 deg...
Thank you all for your cautionary posts which are based on your understanding or practical experience about the criticality of application or possible implications of uncertainty. But Honestly speaking, I really felt demoralized after reading the posts. I accept that I may not be competent to...
I apologise for the inadequate information.
Code of constructions - ASME Sec VIII Div 1 and ASME B31.3 (for the piping associated to vessel)
Material - SS316
It is small vessel with size DN 40. It's a trial equipment which will handle multiple fluids depending on the customer, which may include...
Hello,
Again a few very basic questions regarding Jacketed vessel design and it's name plate marking. Vessel has an inner cylindrical shell containing shell side fluid (process fluid) which is heated by jacket side fluid (utility fluid), flowing in the space between shell & jacket. Consider...
Thank you Jay & Mike for your replies.
The service will be lethal or category-M fluid service. Actually few connections are 1/4" & 1/8" tubes in size, so threaded connections will be feasible here. Also I went through ASME B31.3 but it doesn't restrict use of threaded connections up to 1" size...
Hello,
Please help me to get rid of below problem & Sorry for the long post.
We design vessels & piping for pressure max 10 bar & temp 350 deg C. But our next project demands for 100 bar design pressure. So I need your advice (based on industry practice) regarding flanged connection for piping...
Thank you r6155 for the clarification.
Actually we want to use nozzle with internal thread (our own design & not standard B16.11) to connect to external hose. The nozzle will not be exact cylinder with constant thickness, but will have threads, taper section and few steps in dia. But it will be...
As per the definition SA-484, 3.1.1.4
forgings, n—parts, including bars, billets, semifinished products, or complex shapes, produced by hot mechanical working using hammers, presses, or forging machines.
So the forged condition indicated on test certificate should indicate hot worked condition...
Hello forum,
Can we use hollow cylindrical pressure part machined from rod / bar for ASME Sec VIII Div 1 application?
As per UG-14, we can use machined rods within the limits mentioned therein. But i am in dilemma after referring below interpretation...
Thanks you for your comments.
@r6155
Yes, manufacturing stud instead of bolt will save both material + machining efforts.
@ironic metallurgist
You are right, cut threads are weaker as compared to formed threads. These fasteners will be used in non-critical application (pipe flange which is...
For your ready reference, definitions from Sec II part A are as follows:
Solution Annealing: (from SA484, general spec for SA479)
The separate annealing treatment shall consist of heating the material to the minimum annealing temperature for the grade as listed in Table 2, holding for a...
Hello forum,
In our current project we are short of very few no. of SA193 B8M Cl.1 bolts (required for piping flanges) and due to current COVID situation bolt supplier will not be able to provide required bolt quantity on time. So we have decided to machine heavy hex bolts of spec SA193 B8M...
I am concerned about the bolting to be used in flanges designed as per Mand appdx 2, I forgot to mention this in the 1st post. ASME B16.5 is clear about which bolting standard & type (inches only) to be used.
Also, thread type for ASME B18.2.3.3M & B18.2.3.1M are same i.e., metric, so...
david, My understanding to U-3, standards listed in U-3 are mandatory if stated elsewhere in this Division. Also this table indicates the year of acceptance as for Div 1 appln.
r6155, Sec II part A specification SA193 states that ‘Unless otherwise specified in the purchase order, bolt heads...
