Presentation is loading. Please wait.

Presentation is loading. Please wait.

Click to continue Tank foundations Alan Watson Presenting NPMA Alexandria May 2012.

Similar presentations


Presentation on theme: "Click to continue Tank foundations Alan Watson Presenting NPMA Alexandria May 2012."— Presentation transcript:

1 Click to continue Tank foundations Alan Watson Presenting NPMA Alexandria May 2012

2 AST Operating Locations are all over the world If you THINK that it is SAFE don’t do it ~ Do it when you KNOW that it is SAFE Join API 653 & EEMUA 159 together to have One world wide inspection Standard

3 A.P.I. 650 and 653 only give general guide lines to the type of foundation

4 Corrosion Triangle Steel MoistureAir If all 3 elements are present then corrosion can occur

5

6

7

8

9

10

11

12 A. R. WATSON INC All rights reserved 2008 © Water changes ground bearing pressure under concrete ring wall Tank shell Tank Bottom Ground level Concrete ring wall Ground Pressure Tomorrow is your reward for working SAFE today

13

14

15

16

17

18

19 A. R. WATSON INC All rights reserved 2008 © EEMUA 159 Edge settlement If you THINK that it is SAFE don’t do it ~ Do it when you KNOW that it is SAFE Tank shell settled below groundEdge settlement

20 A. R. WATSON INC All rights reserved 2008 © Causes the top of the tank to become oval and jam the floating roof. - 4 in - 3 in 0 -1in Uneven foundation settlement Tomorrow is your reward for working SAFE today

21 A. R. WATSON INC All rights reserved 2008 © Shell edge punching causes lost product capacity in tank Lost storage capacity over whole tank Product level Easily fixed Tomorrow is your reward for working SAFE today Lost Capacity in Tank

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39 Tank Shell Tank Bottom Location of Possible Corrosion Water and Debris Collected Shape after Repair Tank Settlement into the Foundation EEMUA 159

40 A. R. WATSON INC All rights reserved 2008 © Compacted Ground Tank Ground level Foundation Tank Foundation Settlement

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69 A. R. WATSON INC All rights reserved 2008 © Summary Why install cathodic protection API 651 Why install double bottoms API 650 Appendix “I” Why install concrete under tanks API 650 Appendix “B” We are still making the same mistakes with tank foundations. Tomorrow is your reward for working SAFE today

70 A. R. WATSON INC All rights reserved 2008 © THE NEXT STEP “Determining the Long Term Performance of Tank Foundations through the use of Case Studies”

71 AST Tank Foundation Standard Reflections of Professional Pride Together we are destined to do Great things

72 API Tomorrow is your reward for working SAFE today American Petroleum Institute (API) For more than 75 years, API has led the development of petroleum and petrochemical equipment and operating standards. API 650 “Welded Steel Tanks for Oil Storage API 653 “Tank Inspection, Repair, Alteration and Reconstruction” Publication.

73 API Standards 650 and 653 were produced as a guide for storage tank owners / operators State regulators are now starting to mandate the API Standards into State regulations API Standards have never investigated to see if some of the recommendations work Tomorrow is your reward for working SAFE today

74 International Liquid Terminal Association (ILTA) Tomorrow is your reward for working SAFE today ILTA represents 81 companies and partnerships that operate bulk liquid storage terminals in 43 countries Provides members with essential informational tools to facilitate regulatory compliance and improve operations, safety and environmental performance; Offers opportunities for relationship building, networking and knowledge sharing Represents the bulk liquid terminal industry before Congress and government agencies.

75 EEMUA Engineering Equipment Material Users Association (EEMUA) EEMUA 159 “User’s Guide to the Maintenance and Inspection of Above-Ground Vertical Cylindrical Steel Storage Tanks “ EEMUA 183 “Guide for the prevention of Leakage from Vertical, Cylindrical Steel Storage tanks” Tomorrow is your reward for working SAFE today

76 Codes and standards covering the steel tank design and construction are based on over 100 years of experience and lessons learned. The integrity of the tank structure as a primary container is dependent on the Foundation on which it sits. Tomorrow is your reward for working SAFE today

77 The primary function of a tank foundation is to minimize differential settlement, transfer the weight of the tank structure into the ground strata and prevent corrosion It has been reported that after 20 years of service more than 20% of the petroleum storage tanks have required major repairs to their foundations Owners /operators report a much higher percent

78 Tomorrow is your reward for working SAFE today While some of these foundations have performed satisfactory others have not and have required significant investment in repair. People have theories over which foundations are the best No one has taken an in-depth look at the actual performance of different foundations in different weather environments

79 Tomorrow is your reward for working SAFE today The records obtained to date have shown over 15 varieties of tank foundations Repairs performed on the tank are also of interest to the research team in conjunction with the type of foundation used, this information can be crucial in understanding the corrosion / settlement of the tank

80 Tomorrow is your reward for working SAFE today T ank owners would benefit from a Cooperative Research Program and an unbiased review based on inspection records and case studies and analysis The use of case studies to evaluate the performance of infrastructure system has been successfully used before by the Federal Highway Association to investigate the performance of asphalt and concrete pavements

81 Tomorrow is your reward for working SAFE today The Oklahoma State University research team has already been in contact with several international owners that have agreed to and have supplied construction and inspection records for over 1000 tanks in North America Oklahoma State University research team will require additional feedback from tank owners / operators / Consultants / inspectors from around the world to increase the size of the data base.

82 Tomorrow is your reward for working SAFE today Road Ahead Currently no standard exists for Foundations What is needed -- A Cooperative Research Program to Improve the reliability of Tank Foundations through development of a Joint Standard -- We need your help in a supporting a joint Academia, Industry & Government Cooperative Research Program

83 Tomorrow is your reward for working SAFE today The assembled database will be used to; To investigate the performance of design and construction of tank foundations Effectiveness of cathodic protection

84 Tomorrow is your reward for working SAFE today Performance of double bottom tank repairs Tank foundation repair recommendation and strategies. Today we are still installing tank foundations that failed in the past and continue to fail

85 Thank you For more information visit us at www.arwatson.com “Watson Air Lift®” Technology


Download ppt "Click to continue Tank foundations Alan Watson Presenting NPMA Alexandria May 2012."

Similar presentations


Ads by Google