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XL83NL I am using AS/NZS 3992:2015 (Pressure equipment—Welding and brazing qualification). This is a butt-weld of a pipe spool that will be cast into a concrete structure. A weld Inspector has certified as acceptable who is employed by the fabricator. I have no formal weld qualifications but can...

This is a close-up foto of grade 316SS butt weld. Does the foto reflect any weld defects/ poor quality/ inclusions etc etc? Thanks for your support Foto attached

Thanks to all for the kind responses. Looks like the supplier has tried to pass on the fabrication as it is to the customer( Govt. agency) who does not have a qualified inspector. They may save money by not calling in a third party inspector. Will let you know once the site is back in action...

Thank you all for a wonderful response[smile]

Hi all Attached here are 3 photos of stainless steel pipe (workshop fabricated) that have arrived on site. There appears to be from grinding areas(shiny) Can anybody advise me for acceptance. What defects should i be looking out for? Whether passivation has been carried out and how would I...

DN1200 RC storm water pipe lines test Pipe test procedure will be modified to suit the design pressure of 60KPA which is less then the design test pressure, 90Kpa, of the RC pipes Which is preferable? and how to decide if vacuum test or hydrotest? Thanks to all

Thanks oldestguy The design has been good and there is a drainage layer or single size aggaregate between the concrte wall and this fill separated by geofabric and a drainage pipe under it The issue is that the native fill (excavated for the concrete structure) is not usefull as a backfill...

Thank you

would like to know if the material to be used as backfill behind concrete structure is OK Specification requirement Specification for backfill material a) Native Backfill - Excavated materials such as clay and muck are not suitable as backfill material. Others that are free from grass...

I would like to know if the material to be used as backfill behind concrete structure is OK Specification requirement Specification for backfill material a) Native Backfill - Excavated materials such as clay and muck are not suitable as backfill material. Others that are free from grass...

Thank u all

MTNClimber & Oldestguy Your response is great. The nuclear gauge has a probe limitation of 300mm. The contractor makes a pit as you have stated and collects samples He is taking a risk with 2 layers (600mm) instead of testing each 300mm layer The calibration certs for the nuclear gauge is upto...

Hello A contractor is backfilling with excavated soil against a concrete structure. The backfill matarial has been approved by the designer. The designer requirement is laying and compacting the backfill max in 300mm layers . The height of fill is approx 6 m The backfill contractor wants to...

Thank you all for the valuable comments

I am seeking the best way to backfill between a concrete structure and the sloped cut I have attached an approximate sketch. The requirement is compacting the backfill in layers not more than 300mm The width of placment is approx 2m at the base and the height The length of the backfill is...

Thank you EireChch for the advise

Attached is a gradation report. I assume it may be sand / manufactured sand.Please confirm Also advise if it can be used for pipe trench embedments Thank you

Thanks to all for excellent responses

msquared48 The owner has brought his on geotech / asphalt specialist The contractor is also seeking outside opinion Will wait and watch and keep posting

oldestguy No settlement of the drain pipe / trench The green thing is just paint over some wrong signage that will be corrected soon