Scope
This method can be used to obtain a representative sample at the sampling LPG such as Propane, Butane or mixture, for analysis in the laboratory. Samples obtained can be used for routine tests in the laboratory except for the test method ASTM D 2163 is the analysis of the composition.
An outline of the method
Samples removed from the source by means of a cylinder with a sample first rinse, then fill sampling with a sample cylinder.
Equipment
– Containers Samples, made of metal that can provide maximum security and resistance to corrosion and equipped shellfish on the edges .. Materials suitable form of rust-resistant metal (stainless steel). More clearly seen in Figure 12.
– Pipe sample transfer, is made of corrosion resistant metal or other flexible metal, which is equipped with shellfish and pipe connections.
Figure 12 Typical sample containers and sampling connection
Procedure
Connect the other end of the pipe transfer with shellfish and shellfish sampling point C input on the cylinder. Close shellfish control A, B and shellfish shellfish C, see in the image 13. Rinse the pipe connection by opening shellfish A and B.
Figure 13: Alternative Connection for flushing (purging)
Flushing the sample container: If the identity of unknown samples, use flushing procedure as follows:
– Connect the D shellfish on the transfer pipe vertical position and shellfish C are diatas.Gambar 13
– Close the shellfish B, C and D. Open Keragan A and then shellfish samples C and D. The contents of the container until the fluid out of the shellfish C. Close the clam C and D then existing shellfish A transfer pipe.
– Loosen the connection with the pipe network with cylinders and swivel 180 °, open shellfish C and D and remove liquid.
– Restore the original position, namely shellfish C at the top and secure connection and do this at least 3 times.
If the identity of an unknown sample: As in figure 13 shellfish D is on, close the open shellfish shellfish B and A, open shellfish sample inputs C and enter into the cylinder slowly. then close the shellfish A and sample vapor has been expelled through the flushing shellfish D. and do this at least 3 times.
Displacement Samples
The position of the cylinder as in Figure 13, shellfish D is on. Shellfish C and D closed. Close and open shellfish shellfish B A C keranganan open and the contents of the cylinder with the sample, then close shellfish shellfish input C and B open and close shellfish sample source A. Remove the cylinder from the system, and check if there are leaks.
Sample placement
Keep cylinder containing the sample in a cool place, place to complete the analysis.