Dear Experts
How to decide test temperature and stress (i-e test matrix) for creep rupture stress test (also sometimes referred as accelerated creep testing). Material is SA-213-T22, operating temperature 500C, OD 31.8 mm, Thickness 4.0 mm. Boiler is in-service since 1983. Original Code of...
I have couple of questions on Part 4; API-579-1 (Edition 2016)
1- If length for thickness averaging (computed from equation 4.6) is more than vessel length, how thickness averaging can be performed in this situation? This situation often arises when Q=50 and Dml is large.
2- If length for...
I have a question on Figure 10.3 (ASME FFS-1/API-579-1)
Material (SA-516-70) is exposed to a temperature 1500F for 45 minutes due to fire incident.
Figure 10.3 enlists the curves up to a maximum temperature 1200F.
How to make use of Figure 10.3 in this case? Thanks.
Javed Nasir
Inspection...
Good evening.
I have question on Table 2E.1 (by using this table tensile strength can be estimated by using hardness value).
If hardness value is 90 BHN. Lowest value as per Table 2E.1 is 114 HBN. How to estimate tensile strength for 90 BHN? table does not enlist lower than 114 BHN. Any idea...
Dear Code Users,
Is it correct that as per 2014 Edition of B31.3, For P-No.1 materials PWHT is not required for all thicknesses (even if control thickness is over 38 mm) provided that a preheat of 95C is applied (for nominal thickness over 25 mm )and multiple layer welds are employed (for...
s there any In-Service Inspection Code/Standard for FRP/GRP Tanks/Vessels/Piping? Any European/American Code will suffice.
I have found FTPI-7: FRP Tanks and Piping Institute Recommended Practice for In-Service FRP Tanks.
ASME RTP-1 and ASME BPVC Section X are for the new construction. ASME...
ASME Section I Edition 2015, End Note No. 10 is mentioning factor of safety 4 to 5 on tensile strength but from year 1999 and onward FOS is 3.5 on tensile. (FOS had been 4 to from 1914 to 1998) I think Section I has not updated the end note?
Counterpart of End Note 10 in ASME Section VIII-1 is...
Is there any In-Service Inspection Code/Standard for FRP/GRP Tanks/Vessels/Piping? Any European/American Code will suffice.
I have found FTPI-7: FRP Tanks and Piping Institute Recommended Practice for In-Service FRP Tanks.
ASME RTP-1 and ASME BPVC Section X are for the new construction. ASME...
Good evening dear members:
Vessel is made from SA-106B.
Reinforcement calculations are performed as per 1-10 in lieu of UG-37.
While using "t", 12.5% allowance shall be minus from "t"? 1-10 is not clear on the definition of "t".
UG-37 clearly mentions that when vessel is made from pipe, 12.5%...
Good Morning.
How to calculate the required thickness of heat transfer plates in Plate Heat Exchangers (PHE) as per Section VIII Division 1?
I can see only in API 662 that minimum thickness for plate elements shall be 0.5 mm. UG-16 excludes PHE from minimum thickness requirements.
Is it a U-2...
I have to perform remaining life calculations for an in-service vessel. The vessel was constructed in 1986, construction Code was ASME Section VIII Division 1 Edition 1985 plus summer addenda. Material is A-516-70. Design Temp is 85C.
API-510 does not permit to use the allowable stresses from...
Flange is designed in accordance with Appendix 2. Flange section thickness is more than 75 mm. Para 2-2(b) requires normalizing of "Flange" in this case.
Flange material is SA-266 Grade 2.
SA-266 requires normalizing of "Forging".
Do we need to perform Normalizing at below mentioned two...
"The Mill Test certificate shall state that the radiation level from the steel
plates is less than 100 beckerels/gram"
Why radiation level is limited?
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN
Are the requirements of para. 3.3.4 of ASME Section VIII-2 also apply to the standard B16.5 flanges if they are forged from SA-105?
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN
if plate is normalized SA-516-70,dish head 2.1 is cold formed and then head is normalized due to extreme fiber elongation. do we need test secimens be tested to satisfy UCS-85?
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN
We have selected ASME B30.20 for the allowable stresses.
As per Clause 20-1.2.2 of B30.20, max. allowable stresses (tensile) must not exceed 1/3 of Sy.
How compress computes other max. allowable stresses such as, Shear, Bending, Bearing ? Also provide us the reference of the Allowable stress...
Dear All,
When using equation 13.1-3 of EN 12953-3, should the value of u be taken as 1.5% i-e 0.015 or 1.5?
Thanks in advance.
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN
for semi-automatic/automatic welding, UG-84(i)(3)(a)(1) requires one product test plate (PTP) per WPS used for category A or B joints per welding position.
We have to do semi-automatic welding (FCAW)using one WPS for all A and B in Vertical Up and Flat positions, do we need 2 PTP's, although...
We welded a test coupon 41 mm thick to qualify three welders by mechanical testing, the finished transverse guided side bend specimens have dimensions 37 mm x 250 mm x 10 mm, the thickness has been reduced from 41 mm to 37 mm, is it acceptable?
Opening para. QW-462 says all dimensions are...
