As anticipated the year has begun at a very slow pace, immediate sizeable business opportunities are few and the glut of new projects we hoped for are in sight but well down the track.
This is not an easy period to manage a company operating on a global stage, coming out of the covid pandemic will be a slow process and the financials will dictate our logic and business decisions. There is a famous adage “the numbers don’t lie“ and that is true they do not, so in this period we follow the numbers to safely navigate the company through this period.
Considering we are a high energy management team, you can imagine the challenge it is for us to work through a slow period in the year.
Stasi Prandalos, CEO
MV3 Side-Entry Ball Valves SDV
2"x1.5" CL.1500, Body: SS, Trim: XM19+HS/Inconel 718, PEEK, Lipseals,
2"x1.5", 2" CL.300 Body: SS, Trim: Duplex/17-4PH, rPTFE Insert
c/w Procontrol Pneumatic Actuator
High Pressure Gas Seat Testing
Body: SS, Trim: Duplex/17-4PH, rPTFE Insert, Seal: Viton
Location : Malaysia
Project. : Pegaga Development
EPC : Sapura Fabrication
End-User : Mubadala Petroleum
MV3 Side-Entry Ball Valves (SDV) 16"x12" CL.300, Body: CS, Trim: SS, Primary Metal, Secondary Soft Seats, c/w Rotork Pneumatic Actuator
Project: EPIC for Miscellaneous Instrumentation Dukhan
Application: Crude Oil SEPARATOR INLET SHUTDOWN
End-User: Qatar Petroleum (QP)
Location: Onshore Qatar
MV3 Side-Entry Ball Valves
1.5", 6", 12", 16" CL.150/600/900, FB, RF
Body: LTCS/CS, Trim: Duplex/SS, DPE Seats
Application: Gas Pipeline
Location : Australia
Project. : Solomon Mine Power Plant Project
End-User : DBNGP Dampier Bunbury Natural Gas Pipeline
Are Free Issued Pup Pieces and Advantage for Pipeline Ball Valve Manufacture? (PART 2)
It is understandable that many in Engineering Consultancy and within the EPC sphere adopt the assumption that free-issue supplying a pair of pup pieces when ordering Weld End Pipeline Ball Valves is a good thing for the valve manufacturer. The assumption is that the manufacturer would not be able to take advantage of the economies of scale when ordering line pipe like a pipeline EPC contractor would; when considering the difference in quantities ordered it is nowhere close. Compound that with the fact that line pipe wall thicknesses are typically customized by Pipeline Engineers to save on metal use over long distances, this makes it economically (and logistically) daunting for a valve manufacturer to procure the same; more so when factoring unused excess lengths. To the Pipeline EPC contractor, it is merely a matter cutting off several short lengths of the many kilometers of line pipe they have on order and shipping it to the valve manufacturer. Add on also to that, the advantage of having a ball valve supplied ready-to-weld in the field without having to qualify another set of WPS and with sufficient distance from field girth weld to the valve’s soft parts, what’s there not to like?
Many ball valves manufacturers may not see this as much of an advantage in the valve’s manufacture and there are several reasons. It would take several paragraphs to cover all the reasons (well beyond the space afforded by this newsletter issue) and so we will break this up into several parts to be covered in as many of the following newsletters and this would be the second portion:
Reason 2: Test Bench Limitations
Ball valve manufacturers typically use a test bench to pressure test the product before shipping (see picture below). The test bench is able to pressurize either ends of the valve independently and relies on the test adaptors to form a good seal at each end. As can be seen from the diagram below, the test adaptor allows the test bench to be used with valves of various bore sizes. In order for the adaptor to function properly the two o-rings (shown red in zoomed view) seen in the diagram has to form a good pressure containing seal across the entire circumference of the adaptor and the inner diameter of the pup piece.
The seal’s ability to form a proper seal is heavily dependent on the uniformity of the circular shape it is sealing against and the smoothness of the sealing surface. In many cases when a pup piece is free issued to a manufacturer, it arrives ovalized (non-uniform circular), with a rough inner wall (insufficiently smooth), and a dimple on the inner wall of the due to the line pipe’s longitudinal weld (also non uniform circular). This can cause complications for the manufacturer as the pup piece would need to be clamped and machined to suit the adaptor. This obliges the valve’s manufacturer to machine the internal diameter of the pups in order to obtain the correct circularity; this machining need an extra length of the pup (almost 100mm). After the test in the bench, the extra length of the pup has to be cut to restore the required end to end dimension.