EN 10269 is well known in europe under EN 13480 (piping) and EN 13445 (pr. vessels).
EN 1515 deals with bolting for flanges (Flanges and their joints — Bolting.
42crmo4 is part of a.m. EN standards.
EN 1515
Part 1: Selection of bolting
Part 2: Classification of bolt materials for steel flanges...
Read the German standard called "AD 2000 Merkblatt W7" (materials for pressure vessels, Bolts and nuts made from ferritic steels); 2014-11
There are a lot of limitations in this standards. Lower temp. limit for 8.8 and 5.6 not below -10C. Pressure also limited.
Grade 12.9 seems not to be...
Read the published official PED guidelines.
http://ec.europa.eu/enterprise/sectors/pressure-and-gas/documents/ped/guidelines/index_en.htm
For bolting >> Guideline 7/8
Guideline related to: Annex 1, section 4
Question: What are the certificates required for bolting parts?
Answer: The...
Extra on holes 8 mm is no problem at all; relatively small and influence is only local. Locally (near 8 mm holes) somewhat higher stresses. Not very important and OK if local. In general, all flange ring stresses at bolt circle dia. are relatively low. All in all more a theoretical problem than...
Follow the rules of ASME B31.3. Use Table A-1 for all individual pipe & flange components, incl. bolting. Gasket mat'l also to be checked.A105 is surely not suitable. Consult also ASME B31.3, Appendix L. Regards. Th Pl
NACE is just an organization, not a material. Most likely you intend to select materials for sour service. In that case the Oil & Gas industry dictates that materials shall be selected per ISO 15156 (3 parts in total). Search this form on sour service or H2S or ISO 15156.
Dear sir,
I'm designing piping systems for 30+ years and did also design all kinds of vessels for the Oil&Gas business. I would always go for spiral wound gaskets (unless customers dictate the use of RTJ's). SPW's from reputable SPW manufacturers are very reliable and have been used up to 350...
I did run (ASME-based)flange design calculations for NPS 14-Class 1500 RTJ WN flanges in order to determine MAWP and suitability for rating higher than Class 1500. Loading considered is internal pressure. No external forces/ moments taken into account. Details available upon request.
piping under internal pressure has to be designed per piping design code. pipe design to comply with all design code requirements incl fabrication (incl bending). So, in first instance you must comply with piping design code bending requirements. Rather severe for S31803. In addition to this...
Dear spoonful
I work with a lot of american standards/ codes and standards/ codes in Europe.
Also used AS's to some extent (AS 1210).
No idea where 120 C is coming from.
Perhaps from a standard valid in the good old days.
But I'm already as well (nearly 62).
So, no idea, sorry.
Certain local...
this requires separate design calculations/ design evaluation per ASME B31.3
I have developed design software and could assist
send me an e-mail with all relevant details if you like
I have used all of the mentioned ASME standards for more than 30 years now and I have never encountered a similar statement on ratings in the references ASME's.
You should'nt use A105. This material has a hardness of approx. 140 HB or higher. Doesn't meet the max. allow. hardness of 120 HB for the Low carbon Steel.
Hardness of ring joints shall be eesentially lower than mating flanges. Difference at least 25 HB! (advise/ for proper functioning/...
Since 20 years we apply mainly ASTM A182-F51 (UNS S31803); similar to type 2205 (Sandvik).
This is the most common Duplex St Steel type in the Oil & Gas industry for moderate applications.
UNS S31803 material is ASME listed but not yet in all product shapes.
We fabricate piping systems with this...
only small WN/ hubbed flgs may be machined from bar;
to my memory limited to 4" OD (bar OD);
dicated by ASME piping code B31.3, ASME press vessel code (ASME VIII-1, App 2) and ASTM product spec's for flanges such as A182 + therein referenced ASTM's; see also ASME B16.5.
So, hubbed flgs not to...
