I am prepared a PQR test report for qualification of a temper-bead butt repair on CA-6NM martensitic material to ASME IX. As part of the testing we are performing tensile, bend tests, macro and hardness. The WPS specifies a temper-bead repair using a minimum preheat 120 C. The weld metal is...
I am working on hydro station refurbishment and I have a number of materials that are referred to on the drawing related to the period of construction of 1936 to 1950. The materials are referenced as follows:
Steel Forging ASTM A236-42C (Cross reference BS 24 Part 4 Spec 9C -1941)
Corrosion...
I am working on a project looking at transmission towers that were constructed around 1935 to 1950 period. The transmission towers are constructed with various sizes of structural angle up to 6x6 inches profile. The angles were constructed from steel grade CESA S40 which is medium tensile...
We have been assessing some Spray Desuperheater valves from an HRSG that are having unreliability problems. The operator is experiencing problems with leakage which are caused from damage to the plug and nozzle seats. The units are SD2K and supplied from Copes Vulcan. The steam temperature...
We are performing a ASTM G48 test Method A for a welding qualification/ welders approval on duplex steel. The client request is a 24 hour test and requiring a test result by weight loss of 4g/m2 or better. The ASTM G48 Practice A test we normally perform is a 72 hour test not 24 hrs. The...
I am working on an HRSG SHP boiler. The existing superheater tubes are manufactured from grade A178. The original tubes had a hardness of about 150 HV. The tubes are about 10m long and this has caused a lack of flexibility in operation causing the tubes to buckle and distort. The tubes have...
