Piping Technology & Products, Inc. (PT&P) hosts online courses approved for P.E. / PDH credits. 90 days total is given to complete the online course, but the course can be completed in about 9 hours. It's completely online and you can save your progress and come back to it as many times as you need to. Your certificate is issued 2 weeks after all quizzes are completed, the final test is submitted and graded.