![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqICGslqx1CzLPbIgrFqkbD-D1slEIykCzlkZvbPrHHZ2tKiobA6wtoL6jXlx6h_5BMAm5V5B6yK5Mg5EEFdDuvo_MuJEMycx-_d7UXRNMJN0mSrIXLhyXaksKwLg4v6tXfHVBTOVCVqZp/s400/Pig_launcher-1.jpg)
The cleaning "pig" that was send through the pipeline.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixFuS0uDPqmX3yEm_Y4qdw0hAHHM-p1qI89pEKdc0ERK3eUf8nzKQHyrAxmj7H7JynA3l2VnLcg8Zuzd9nrJKXOGW5DqJuXYIfQKGXUzusfqGBWJqtfNVnX69_E-3aHa0KZqQE3Hbpdvwo/s400/Pipeline_pig-1.jpg)
Loading a foam "pig" into the launcher.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEivC4EF6KIWSG6I-eyoVmL3I_LcWnF8Z69Omgs4M6MnpFrgVko7iuI6jHZ243fovv90mo6Ygcn3EgQgK3woKkumdAvf_6f7Ye0L5YxMHHUHvDedvfHfO8L0-9NqG6xhzJ8zDfFOKqVqXCml/s400/Pipeline_pig-2.jpg)
Workers check and adjust the pressure in the pipeline to push the "pig".
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkt1FUW3crWHjYqLxARCwh__dEo6c3MPSAl5H00OdM5VP2-X3MMvfKylpbhEMQmf36ssbhEGAQXxkgifrwF3mkFsOMpMxdLgWWAvLyzPPfU7hgfGNAcoRS3oUuluxBu3Li2M9zVIgFv0yK/s400/Pig_launcher-2.jpg)
A worker releases pressure from the pipeline. A light blue stream of compressed air can be seen venting from the top of the pipe.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiTjtUBKub9iUmzSWaU2zk8hZ2R2HSm2ycaCljxa4fbn637_brejg0mnTXzvtPnbKXNEJUBSn7b9QoYNTTqaPngDw1NCTwa4kwjZKwgbG9A3ojZQWuUPJkoCwQEFTJCxLu3EUddN5R9N85o/s400/Pig_launcher-3.jpg)
Workers torque the bolts on a flange.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfXHOjTxsQoi-OhpuCsEG1yNCSYAsVMF6_X1ItPmRQfuTaAu_s6p50aJ9x8gl9-mDVRe_vC9H6WqPhyXjkdj2T_flBPqmd9cWUCNaEG4-CsAalz7Z_a-VSZ0hZybUR46s7ekxtndK9wQl1/s400/Pig_launcher-4.jpg)