I am curious (before I start a PQR for my FPQ) if there are any pre-qualified FPQ for the vertical position. I have pre-qualified FPQs for the horizontal position but I need something where we will be connecting to existing HDPE pipe and the joint will need to be fused in the vertical. The...
My project engineer has specified B31.1 for all piping, and some of that pipe is FRP pipe. B31.1, Section N, Chapter V stipulates that I need a BPS (the manufactur's instructions that give times, temps, etc.) with a PQR and a BPQ. I have a BPS, the PQR is giving me a hard time. It has always...
We just today got a drawing where 4 sample pipes are to be inserted in a carbon steel tank, The sample pipes are to be welded using C276 weld wire, which is a P43 SFA 5.14 material - we don't know what the sample pipes will be made from . The test completed its settlement test and we just...
My 3rd party surveyor did not have a current calibration for the TOPCON total station he used during site layout. He did a daily check of the unit on benchmarks provided by the client. I am used to having a certificate of calibration for these units on other jobs, but am wondering if this is...
On a P1 to P1 pipe l, we have a weld to make on material with NWT of 1.375. Our WPS covers to basemetal thickness range of 1.875 to 9.00". The GTAW maximum is 1" and the SMAW maximum is 8". The WPS does not make mention of PWHT, permissible under Section IX, QW 407.1. However, under B31.1...
We have a 78" flat face flange and a red rubber gasket 1/8" thick. Total of 68 4" bolts. Does anyone have any idea of a maximum torque? A formula to calculate one? I have seen anything from 250 ft. lbs. to 700 ft. lbs. to follow the rule of thumb for the size of the bolt. Any help would be...
I have a 78" butterfly valve, total of 192 bolts. All bolts have 3-4 thread protrusion except 2. One has about 1/2" thread shy of flush; the other is flush. Under ASME B31.3, they are acceptable. Under AISC they are acceptable. However, I am working to ASME B31.1, and under that they are...
Am preparing for the CWI exam. Have signed up for the week-long clinic, but am also studying in my (very little) spare time. Is that a good idea? Can I look at this stuff too much? Should I just take what I learn in the seminar and put it with my field experience? Anyone have any ideas?
I have a conveyor system that, while it is supposed to be suitable for winter enviroment, apparently is not; there is a great deal of ice build up. The belt plows are doing their job but it is still not enough We are going to get some deicing mist, but what else can anyone think of? This is...
I am having trouble on grease lines blowing. There is a torque value for the compression fittings that we cannot obtain from the European manufacturer (Dropsa). These are 26mm fittings and they just are not compressing. Manufacturer will not return any phone calls or emails at all. Can...
Another individual was talking about how in the course of his carreer (military & government connected) he had always had any welds involving moment connections UT. This got me thinking-I have a number of these connections in one of our structures, and had only done the VT. I have looked at...
We have tried all the standard "go to" methods with no avail. One of our conveyor belts (at the take up) wants to walk east. Shimming hasn't helped; tweaking the iron hasn't helped. Adjusting the idlers hasn't helped. The belt is very tights, almost like it is binding somewhere, but there...
My civil guy is going to be making a pour tomorrow and wants to know if he can use the yard of grout ordered to prime the pump and place it in the corners of the slab that will be filled with concrete. He said it was 'honeycombed' - it is not, but it is a bit uneven. The rebar is in place...
My welders showed up on an industrial jobsite without any certified welders. I need to get these guys certs but I am more familiar with AWS D1.1 for structural welding and ASME 31.1/31.3 for pipe. They will be welding ductwork but more like HVAC ductwork - in fact, they will be using 6010...
I have two 30 HP motors that require heaters (due to job specifications) Because of a communication breakdown, they were brought to the job for installation which didn't take place; the temp power crew forgot to rehook the heaters up How long can they go without heat without this becoming an...
I saw something that I am not sure I have ever seen on an A325 bolt - a fellow inspector had a small (thumb size) brass hammer and went around to the A325 bolts (3/4") and hit them with this little hammer. Now, I am familiar with this method when you are using a castle bolt and Texas hot rod on...
Is there a definitive "right" amount of bolts to inspect, be it a number, percentage, or whatever when checking a building? I can't find anything in my paperwork, and I have been doing 10% of each connection. Is this overkill? Should it be 10% of the total number of bolts? We are using DTIs...
I have 20 or so (out of 7,000) anchor bolts (1" X 13" allthread) set in epoxy grout (17,000 psi avg strength) whose nuts are not fully engaged (about 1 to 2 threads below flush) Rather than bring in the core drillers to pull these out I would like to be able to have a welder come in and "kill"...
I am having trouble getting an epoxy grout to come to design strenth The material is conditioned for a hot weather pour What about the high humidity in the part of the country where the pour is occurring (SW VA/East TN) The grout is achieving 2000 psi less than jobsite engineering spec and...
