Download - 1 API 16A 3 rd Edition Winter Conference Jan - 2014 API 16A Chairman: John Busby Co-Chair: Jim McCabe

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API 16A 3rd Edition Winter Conference Jan - 2014

API 16A Chairman: John Busby Co-Chair: Jim McCabe

1220 L Street, NW • Washington, DC 20005-4070 • www.api.org

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API 16A Status

• 3rd Edition / June 2004 / Effective Date: December 1, 2004

• Reaffirmed: August 2010 • Present Status: Under 4th Revision• Target date for comments Feb-2014


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4th Edition Topics – API 16A

• Updated Temp chart includes Low/Operating/Extreme levels

• Defined HAZ zone 2mm (consistent w/API 6A and NACE)

• Established Minimum Design Criteria for 16A equipment


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• Removed 25k & 30k classes (ref 17TR8)• We have 16A representation in 17TR8

(WG formed)• Closure Bolting Hardness per API 20E

BSL-2 / API 6A (WG formed)• Gas handling systems are out of scope

for 16A, should be in RP-64


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• Sealing characteristics on annulars and ram preventers. (WG formed)

• Updated shearing test to include off-center test.

• Product history files require additional data, (WG formed)


• Discussed brinnelling of ring groves during shell test. Ring groove dimensional measurements should be taken as finished machined data before shell test

• Document clean up. (ISO replaced)• Discussed establishing PSL levels,

agreed 16A criteria already meets PSL-3 criteria. Dropped further consideration.


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4th Edition Work Groups – API 16A• Five Work Groups Formed

•Gas testing qualification•Sealing characteristics •PSI-A v/s PSI-G•Closure bolting •Product history records

New/Ongoing Discussion Topics • More robust shearing test, i.e. off-center in

compression• Designate surface & subsea equipment• Steam temp rating• Closing on flow• 25k & 30k ratings• Define hub face separation for drilling connectors• 5 year product marking requirements • 6A-F flange limits• Should 16A include workover operations in scope

New Temperature RatingsLower Limit Operating Temperature Limit Extreme Temperature Limit

CodeTemperature

CodeTemperature

CodeTemperature

°F (°C) °F (°C) °F (°C)

A -15 -26 A 150 66 A 180 82

B 0 -18 B 180 82 B 200 93

C 10 -12 C 210 99 C 220 104

D 20 -7 D 240 116 D 250 121

E 30 -1 E 270 132 E 300 149

F 40 4 F 300 149 F 350 177

G Other Other G Other Other G Other Other

EXAMPLE Material “FDE” has a lower temperature rating of 40°F, a continuous elevated temperature rating of 240°F, and an extreme temperature limit of 300°F.

Table 4 – Temperature ratings of non-metallic sealing materials

Minimum BOP Design Criteria

Download - 1 API 16A 3 rd Edition Winter Conference Jan - 2014 API 16A Chairman: John Busby Co-Chair: Jim McCabe

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