Gas Tracing - Edges

Bit settings for gas edges in the Minerville sample database:

Bits 26 through 31 — These bits are reserved for future use by Miner & Miner.

Bit 25 — This bit specifies whether or not an edge feature is traceable. A value of 0 means that the gas can flow through it; 1 means that it cannot.

Bit 25 may be set in one of two ways.

The first method uses the field model name PIPESTATUSINDICATOR. If this field model name is assigned to a field within a feature class and the field value equals 0, then Bit 25 is set to 1 and the feature is not traceable.
The second method uses the feature class model name GASNONTRACEABLE. Assign this model name to those feature classes that you want excluded from gas traces.

All traces except the CP trace respect Bit 25.

Bit 24 — This bit specifies if an edge can be "pinched" to stop the flow of gas and depends on the field model name PIPETYPE. This is an unusual technique where a special device physically squeezes the pipe to interrupt the gas flow. The value of P means that the edge is pinchable, and the bit is set to 1. The value of NP means that it is not pinchable and the bit is set to 0.

Bit 23 — This bit specifies if the edge is a barrier to a cathodic protection trace; a non-bonded, plastic pipe can be an example of such an edge. This bit depends on the existence of three field model names: CPSYSTEMSTATUS, BONDEDINDICATOR, and MATERIAL. If CPSYSTEMSTATUS exists, the value of 1 is used to set the bit. If CPSYSTEMSTATUS does not exist or the value is 0, ArcFM then looks for BONDEDINDICATOR and uses the value of Yes to set the bit. If BONDEDINDICATOR does not exist or the value is No, ArcFM looks for MATERIAL and uses its field value to set the bit. If the material is conductive, it does not set the bit. If the material is non-conductive, then it sets the bit as a CP stop.

Bit 22 through 9 — These bits are interpreted as a 14-bit integer code that indicates the nominal operating pressure of the edge feature. The actual mapping of a particular pressure value onto a code value may differ from one utility to the next, and many applications that use the GasTraceWeight will not need to convert the code into an actual pressure. ArcFM does not currently populate or use these bits. While the ArcFM Gas Pressure Trace currently ignores these pressure codes, it relies instead on in/out pressures at junctions, such as regulators, to establish boudaries of a pressure zone.

Bits 8 through 0 — Reserved.

Byte 1(LSB)

bit 0

bit 1

bit 2

bit 3

bit 4

bit 5

bit 6

bit 7

reserved

Byte 2

bit 8

bit 9

bit 10

bit 11

bit 12

bit 13

bit 14

bit 15

reserved

Pressure Code

Pressure Code

Pressure Code

Pressure Code

Pressure Code

Pressure Code

Pressure Code

Byte 3

bit 16

bit 17

bit 18

bit 19

bit 20

bit 21

bit 22

bit 23

Pressure Code

Pressure Code

Pressure Code

Pressure Code

Pressure Code

Pressure Code

Pressure Code

Conductive (CP) Stop

Byte 4 (MSB)

bit 24

bit 25

bit 26

bit 27

bit 28

bit 29

bit 30

bit 31

Pinchable

Pipe Status

reserved

Byte 1(LSB)
bit 0	bit 1	bit 2	bit 3	bit 4	bit 5	bit 6	bit 7
reserved

Byte 2
bit 8	bit 9	bit 10	bit 11	bit 12	bit 13	bit 14	bit 15
reserved	Pressure Code	Pressure Code	Pressure Code	Pressure Code	Pressure Code	Pressure Code	Pressure Code

Byte 3
bit 16	bit 17	bit 18	bit 19	bit 20	bit 21	bit 22	bit 23
Pressure Code	Pressure Code	Pressure Code	Pressure Code	Pressure Code	Pressure Code	Pressure Code	Conductive (CP) Stop

Byte 4 (MSB)
bit 24	bit 25	bit 26	bit 27	bit 28	bit 29	bit 30	bit 31
Pinchable	Pipe Status	reserved