API 16A 3rd Edition
Winter Conference Jan - 2014
API 16A Chairman: John Busby
Co-Chair: Jim McCabe
1
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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2
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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3
4th Edition Topics – API 16A
• 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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4
4th Edition Topics – API 16A
• Sealing characteristics on annulars and
ram preventers. (WG formed)
• Updated shearing test to include offcenter test.
• Product history files require additional
data, (WG formed)
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4th Edition Topics – API 16A
• 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.
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
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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 Ratings
Table 4 – Temperature ratings of non-metallic sealing materials
Lower Limit
Operating Temperature Limit
Temperature
Code
Temperature
Code
°F
(°C)
A
-15
-26
B
0
C
Extreme Temperature Limit
Temperature
Code
°F
(°C)
°F
(°C)
A
150
66
A
180
82
-18
B
180
82
B
200
93
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.
Minimum BOP Design Criteria
Test
Sealing characteristics
Fatigue
Stripping
Shear
Hang-off
Fixed bore a
Ram BOP
Variable bore
Blind a
Shear
Hydraulic
connectors
Annular BOP
Reportable
Reportable
Reportable
Reportable
Reportable
52 cycles
28 @ minimum
dia, 28 at Max.
Dai
52 cycles
52 cycles
52 cycles
3000 ft and 100
tool joints
Reportable
N/A
N/A
3000 ft and 100
tool joints
N/A
N/A
N/A
See Table 18 or
PO
N/A
450k< 5inch
Reportable
N/A
N/A
N/A
N/A
600K >5 inch
Packer access
Ram locking device


200 cycles with 10 pressure cycles
50 cycles
11 Successful Lock and seal
N/A
Locking mechanism
Sealing mechanism
Temperature verification

N/A
Low temp 3 cycles, HT Fatigue 200 closures 10 pressure cycles, HT Emergency 1 Hour hold
time

P2, S2

P1, S3
N/A