SP001 STANDARD AND INQUIRIES

Transcription

1 SP001 STANDARD AND INQUIRIES

2 Inspection Based on Installation Type and Risk to Environment Tanks offering greatest risk have significantly more inspections Tanks with less risk have less inspections

3 SP001 Scope Ambient up to 200 F Atmospheric pressure

4 Facilities with a mix of tanks

5 Portable Containers (per SP001) Closed top AST 55 U.S. gallons or more and not intended for fixed installation Fills void in industry for inspection

6 Shop-Fabricated AST (per SP001) Welded metal AST fabricated in a manufacturing facility OR An AST without a nameplate with a volume less than or equal to 50,000 U.S. gallons

7 50,000 Gallons

8 Underwriters Laboratories UL 142 Steel Aboveground Tanks for Flammable and Combustible Liquids UL 2085 Protected Aboveground Tanks for Flammable and Combustible Liquids

9 Performance Tests A complete evaluation conducted on a limited quantity of representative tanks. These tests are intended to verify compliance with all applicable performance requirements in a standard. Production Tests A limited evaluation conducted on each tank prior to shipping. These tests are intended to verify compliance with production requirements in a standard, such as leakage. Support design test 2 times weight of another full tank Air pressure test Ladder design test 1000 lb. static load at center of longest rung Hydrostatic test

10 STI AST Technologies (UL 142)

11 UL 142 ISBN Steel Aboveground Tanks for Flammable and Combustible Liquids Atmospheric Tank -0.5 to 1 psig Single wall Double wall Steel Diked Tanks Open or Closed Top Carbon or stainless steel Stationary use only

12 UL 142 Capacities up to 75,000 gallons Specifies steel thicknesses Primary tank Secondary tank Shells and heads

13 UL 142 Steel thickness

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16 UL 142 Rectangular tanks Requires performance testing to prove design at 15 psi Manufacturing air test at 3 psi 18 Performance 18.1 Hydrostatic strength test The tank shall be tested to demonstrate that the strength of the assembly and the welded joints are in accordance with these requirements The tank shall not rupture or leak when subjected to the Hydrostatic Strength Test, Section Top load test After being subjected to the Top Load Test, Section 41, the tank shall then be subjected to the Leakage Test, Section 39, and shall not leak.

17 Open Diked Tanks (F911)

18 Diked tanks with Rainshields

19 Closed Top Dike

20 UL 2085 ISBN Protected Aboveground Tanks for Flammable and Combustible Liquids Protected Tank Integral Secondary containment Part of the construction of the tank, monitorable Insulation Reduce heat in a fire Protection from physical damage

21 2 Hour 2000 Degree Furnace

22 Vehicle Impact Resistance

23 Ballistics Resistance 150 grain M-2 ball ammunition Muzzle velocity of 2700 feet per second.30 caliber rifle Distance of 100 feet

24 UL 2085 Tank Construction Refer to UL 142 Steel thickness Welding Support design Vents Emergency vents Must have provisions for monitoring interstitial space

25 Cutaway of insulated tank technology

26 Concrete Encased

27 Generator Base Tank

28 UL Listed Generator Base Tank

29 UL Listed Generator Base Tank

30 API 12F Table 1 Tank Dimensions includes: Capacity Outside diameter Height Connection details

31 Figure 1 Figure 1 Tank Dimensions Tank Dimensions

32 API 12F Tank dimensions

33 Field-erected AST (per SP001) Welded metal AST erected on-site where it will be used. Limited to a maximum shell height of 50 feet and a maximum diameter of 30 feet An AST without a nameplate that is more than 50,000 U.S. gallons and a maximum shell height of 50 feet and a maximum diameter of 30 feet

34 API 650 Welded Steel Tanks for Oil Storage Shell courses t d 2.6D( H S d 1) G CA t d = design thickness (in.) D = nominal tank diameter (ft.) H = height of liquid (ft.) G = specific gravity CA = corrosion allowance (in.) S d = allowable stress (psi)

35 SP001 Key terms Release Prevention Barrier (RPB) Continuous Release Detection Method (CRDM)

36 Release Prevention Barrier (RPB) Liquid containment barrier Under the AST Diverts leaks toward the perimeter of the AST where they can be easily detected

37 Continuous Release Detection Method (CRDM) A means of detecting a release of liquid through inherent design. It is passive because it does not require sensors or power to operate. Liquid releases are visually detected by facility operators. Tank with Release Prevention Barrier Secondary containment AST including double-wall ASTs Elevated AST

38 Tanks with CRDM

39 Category 1 Secondary containment and CRDM Double-wall Tank with Overfill Prevention Tank in a Concrete Dike

40 Category 2 Secondary containment Tanks in earthen dike Dike prevents release due to catastrophic tank release only

41 Category 3 No Secondary Containment No RPB

42 Risk Matrix concept More Risk Tank Size Category 1 Category 2 Category 3 More Risk Shop built tanks P P P, E&L(10) ,000 5,001-30,000 30,001-50,000 P P, E&L(10) [P, E&L(5), I(10)] or [P, E(5) & L(2)] P, E(20) [P, E(10)& I(20)] or [P, E(5) & L(10)] [P, E&L(5), I(10)] or [P, E(5) & L(1)] P, E(20) P, E&L(5), I(15) P, E&L(5), I(10) Field erected P, E(5), I(10) P, E(5), I(10) P, E(5), I(10) Portable containers P P P **

43 Owner s inspections Monthly and Annual Containment area and foundation Shell coating Normal vents operation Emergency vents operation Tank level gauge Interstitial space monitor Overfill valves and alarms

44 Formal External and Formal Internal Inspections Performed by Qualified Tank Inspector STI Trained and Certified API 653 Adjunct Certified (with additional SP001 certification)

45 STI Inspector Certification Attend seminar Pass exam Visual acuity exam 5 year certification Over 1000 certified STI inspectors

46 STI SP001 Aboveground Tank System Inspector Training Course Corrosion Basics Inspection Techniques Regulatory Requirements Fire Codes Valves and Piping Level Monitoring Electrical Issues Hands-on Demonstrations Burbank, CA December 7 11, 2015 Baltimore, MD January 25 29, 2016 Houston, TX Feb. 29 March 4, 2016

47 External inspections Containment area Stairways, ladders Normal vents Emergency vents Overfill alarms Fire valves UT of accessible areas, near base of tank (internal inspection if problems found)

48 Internal inspections Check all external inspection items UT of entire tank bottom elevated tanks do not require entry UT methods UTT point measurements (15 points per sq. ft.) UTS full scan if problems found in UTT

49 Suitability for continued service MIC corrosion Repair immediately. Next inspection 2 years Category 3 less than 75% remaining, then repair. Next inspection 5 years Category 2 3 in 2 in a sq. ft. is less than 75% remaining, or less than 50%, then repair. Next inspection 5 years Category 1 3 in 2 in a sq. ft. is less than 50% remaining, or less than 25%, then repair. Next inspection 5 years % Remaining 3

50 SP031 4TH EDITION Standard for Repair of Shop-fabricated Aboveground Tanks for Storage of Flammable and Combustible Liquids

51 Repairs Per STI Standard SP031 covers shop-fabricated tanks only Qualified personnel for repairs Facility that manufactures STI, UL, etc. tanks ASME Section IX welders AWS D1.1 welders

52 SP031 Scope Repairs Bottom replacement Add pipe connection Repair to supports Tightness testing of repairs and modifications Painting

53 What makes shop-fabricated tanks different? Shop-fabricated Typical Bottom or Head Field-erected Typical Bottom

54 Scope Aboveground Tanks Flammable and Combustible Atmospheric Shop-fabricated carbon and stainless steel Built to national standards What is not included? Underground tanks to be used aboveground Field-erected tanks Bolted or riveted tanks Good engineering practice and experience

55 Repairs at knuckle Limited repairs in knuckle area Otherwise, replace the bottom or head.

56 Shell Repairs Lap weld patch plates Insert plates Shape Existing welds spacing

57 Modifications Section New pipe connections Reinforcing plate when pipe >2 Manways Reinforcing plate when below liquid level New second bottom Knuckle at bottom Increase Shell Height Anchor Chair Addition

58 Bottom Repairs

59 Testing Requirements Testing of all repairs and modifications required Significant repair examples (requires tank pressure test) Complete replacement of bottom Patch plate greater than 12 square feet Openings greater than 12 inches diameter Final inspection by SP001 inspector or tank manufacturer

60 INQUIRIES ABOUT SP001

61 QUESTION: DOES STI SP001 COMPLY WITH EPA S REQUIREMENT FOR TANK INTEGRITY TESTING?

62 Answer: STI SP001 meets the intent of 40 CFR 112.8(c)(6) You must determine, in accordance with industry standards, Appropriate qualifications for personnel performing tests and inspections, Frequency and type of testing and inspections, which take into account container size, configuration, and design You must inspect The container's supports and foundations. The outside of the container for signs of deterioration, discharges, or accumulation of oil inside diked areas

63 QUESTION: WHY DOES STI SP001 REQUIRE INTERNAL INSPECTIONS WHEN NOT EASILY ACCESS THE INSIDE OF A SMALL TANK?

64 Answer: STI SP001 does not mandate entry into a tank for any tank under 30,000 gallons (113,529 liters). For tanks under 30,000 gallons, either internal inspections are not required, or else an alternative is given with the use of leak-test inspections. Tanks larger than 30,000 gallons usually have manways to allow personnel entry.

65 QUESTION: DOES THE STI SP001 STANDARD INCLUDE INSPECTION OF FIBERGLASS TANKS?

66 Answer: SP001 focuses primarily on inspection of welded, metal tanks. Also included is 55-gallon drums, intermediate bulk containers (IBCs) and other such containers that may be of metal or plastic construction.

67 Question: Are the checklists in Appendix C copyrighted? Answer: No, but the rest of the standard is copyrighted.

68 QUESTION: CAN STI SP001 BE USED TO INSPECT A SULFURIC ACID TANK?

69 Answer: No, the standard applies to ASTs storing: Ambient up to 200 F Atmospheric pressure

70 QUESTION: SHOULD I REFER TO STI SP001 OR API 653 AS A BASIS FOR INSPECTION?

71 Answer: The scope of STI SP001 includes shop-fabricated and small field-erected tanks. The scope of API 653 includes tanks built to API 650 and API 12C. If the tank is horizontal UL 142 tank, then STI SP001 probably is a better choice.

72 Answer: The scope of STI SP001 includes shop-fabricated and small field-erected tanks. The scope of API 653 includes tanks built to API 650 and API 12C. If the tank has an API 650 nameplate and is larger than 250,000 gallons, then API 653 is the better choice. STI SP001 is risk-based, thus the inspection schedule for many tanks is less conservative than API 653.

73 QUESTION: WHAT ABOUT A TANK SET ON A CONCRETE PAD, BUT THE DIKE DOES NOT HAVE A CONCRETE FLOOR?

74 Category 1 or 2? RPB with earthen dike Category 1 CRDM and Spill Control

75 QUESTION: IS A 2-COMPARTMENT TANK CONSIDERED ONE TANK?

76 Answer: Compartment tank is one tank The 25,000 gallon tank is divided into two, each with a separate product 12,000 13,000 25,000 gallon tank OR two tanks?

77 QUESTION: IS A SPILL BOX CONSIDERED SPILL CONTROL?

78 Answer: A spill box is NOT spill control (per SP001) Overfill prevention device such as a spill bucket on the fill port constitute spill control? Spill containers do NOT prevent an overfill (overfill through vents)

79 QUESTION: CAN A TANK BE LINED TO UPGRADE IT SUCH AS IN THE UST RULES?

80 Answer: The SP001 Committee has determined that an AST can NOT be upgraded with the addition of a liner.

81 SP001 and SP031 Standards Available in Publications at SP001 and SP031 available together at a discounted price Technical Questions STI Engineer and Staff Liaison Dana Schmidt ext 246 dschmidt@steeltank.com