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Dixon Sanitary 2016
800.789.1718
Bio-Pharmaceutical Fittings (BPE)
I
Element
C Mn
P
S
Si
Cr
Ni
Mo
minimum
---
---
---
0.005
---
16.00
10.00
2.00
maximum
0.030
2.00
0.045
0.017
1.00
18.00
15.00
3.00
Weld End chemical analysis (%) per ASME BPE 2012 Table MM - 2.1-1 and MM - 5.1.1
BPE Surface Finish Requirements (Table SF-2.4-1)
Surface designation
Mechanically Polished ID and OD
Dixon Sanitary
High Purity code
R
a
Maximum
ID µ-in.
OD µ-in
SF0
no finish requirement
no finish requirement
SF1
20
32
PL
SF2
25
32
SF3
30
32
Surface designation
Mechanically Polished OD and Electropolished ID
R
a
Maximum
ID µ-in.
OD µ-in
SF4
15
32
PM
SF5
20
32
SF6
25
32
Technical Specifications
Acceptance Criteria for Stainless Steel Mechanically Polished Product Contact Surface Finishes
Anomaly or Indication
Acceptance Criteria
Pits
If diameter <0.020" and bottom is shiny [Notes (2) and (4)]. Pits <0.003"
Diameter is irrelevant and acceptable.
Cluster of pits
No more than 4 pits per each ½" x ½" inspection window.
The cumulative total of all relevant pits shall not exceed 0.040".
Dents
None accepted [note (1)]
Finishing marks
If R
a
maximum is met
Welds
As welded shall meet requirements of MJ-6. If welds are finished, then shall be smooth and blended.
Nicks
None accepted
Scratches
For tubing, if cumulative length is <12.0" per 20' tube length or prorated and if depth is <0.003"
For fittings, valves and other process components, if length is <0.25" cumulatively, depth <0.003" and R
a
max. is met.
For vessels, if length <0.50" at 0.003 depth and if <3 per inspection window [Note (3)].
Surface cracks
None accepted
Surface inclusions
If R
a
max. is met
Surface residuals
None accepted, visual inspection
Surface roughness (R
a
)
See Table SF-3 (see above)
Weld slag
For tubing, up to 3 per 20' length or prorated, if <75% of the width of the weld bead.
For fittings, valves, vessels and other process components, none accepted
(as welded shall meet the requirements of MJ-6 and Table MJ-3).
Porosity
None open to the surface
Notes:
1. For vessels, dents in the area covered by and resulting from welding dimple heat transfer jackets are acceptable.
2. Black bottom pit of any depth is not acceptable.
3. An inspection window is defined as an area 4" x 4".
4. Pits in super-austenitic and nickel alloys may exceed this value. Acceptance criteria for pit size shall be established by
agreement between owner/user and manufacturer. All other pit criteria remain the same.