129 Series High Pressure Multi-Flex™ High Pressure Line Stop Plugs Sizes: 2" to 96"

download Installation Instruction Summary for Air and Water End of Plug Inflation

Compact Diameter Allows Insertion Through a Small Hot Tap in a Pressurized Pipeline

Petersen Inflatable Multi-Flex Pipe Plug Insertion System installs a plug into a pressurized pipeline without removing pressure. This allows for maintenance of pipelines without reducing pressure or emptying the pipeline. There are two Petersen Hot Tap Insertion Systems.

The 128 Series Multi-Flex Plug requires a smaller hot tap size and is installed down stream of the hot tap. This allows the plug launching system to also bypass flow upstream of the plug. The 129 Series Plug can be built for much higher pressures than the 128 series but requires a somewhat larger hot tap and inflates immediately below the hot tap. When the project is complete a Completion Valve may be installed and the tapping valve removed.

Hot Tap Insertion, Flange Inflation, Higher Pressure

End inflation port also available

Hot Tapping Assembly

Other pressures, sizes, and
configurations available

deflated line stop plug

Plug deflated for insertion
through a hot tap

Hot Tap Plugs (Other Sizes and Pressures Available)

Plug Diameter				Maximum		**Pipeline		Inflation Flange	Inflated Seal Length		Shpg Wt lbs	Item Number
Maximum		Hot Tap		Inflation		Max. Head			Inflated Seal Length
in	mm	in	mm	psig	bar	ft	m		in	mm
2	50	2	50	90	6.2	103	31.3	1/4" mnpt	4	102	2	PET.129-002
3	76	3	76	90	6.2	103	31.3	1/4" mnpt	6	152	3	PET.129-003
4	102	3.5	89	90	6.2	103	31.3	1/2" mnpt	10	254	4	PET.129-004
6	152	4.0	102	90	6.2	103	31.3	1/2" mnpt	10	254	5	PET.129-006
8	203	6.0	152	90	6.2	103	31.3	1/2" mnpt	12	305	8	PET.129-008
10	254	6.0	152	90	6.2	103	31.3	1/2" mnpt	15	381	11	PET.129-010
12	305	8.0	203	90	6.2	103	31.3	1" x 150 lb	18	457	20	PET.129-012
15	381	8.0	203	57	4.0	64	19.5	1" x 150 lb	22	558	25	PET.129-015
16	406	10.0	254	48	3.3	54	16.5	1 1/4" x 300 lb	24	610	28	PET.129-016
18	457	10.0	254	48	3.3	54	16.5	1 1/4" x 300 lb	27	685	33	PET.129-018
20	508	10.0	254	40	2.8	45	13.7	1 1/4" x 300 lb	30	762	35	PET.129-020
24	610	12.0	305	37	2.6	42	12.8	2" x 300 lb	36	914	37	PET.129-024
30	762	12.0	305	30	2.0	34	10.5	2" x 300 lb	45	1143	53	PET.129-030
33	838	12.0	305	30	2.0	34	10.5	2" x 300 lb	49	1244	56	PET.129-033
36	914	12.0	305	27	1.8	31	9.4	2" x 300 lb	54	1372	70	PET.129-036
42	1067	16.0	406	21	1.5	24	7.3	4" x 300 lb	63	1600	83	PET.129-042
48	1219	16.0	406	15	1.0	17	5.2	4" x 300 lb	72	1829	109	PET.129-048
54	1372	16.0	406	12	0.8	14	4.3	4" x 300 lb	81	2057	144	PET.129-054
60	1524	18.0	457	10	0.7	11	3.5	4" x 300 lb	90	2286	148	PET.129-060
66	1676	20.0	508	10	0.7	11	3.5	4" x 300 lb	99	2514	165	PET.129-066
72	1829	24.0	610	10	0.7	11	3.5	6" x 300 lb	108	2743	180	PET.129-072
84	2133	24.0	610	10	0.7	11	3.5	6" x 300 lb	126	3200	210	PET.129-084
96	2438	30.0	762	10	0.7	11	3.5	6" x 300 lb	144	3657	240	PET.129-096

**Inflatable Plug Warning: Maximum head pressures that a pipe plug may restrain can only be estimated. Slippage is influenced by many factors including fluid in the pipe, coefficient of pipeline friction, pressure required to inflate the plug, and accuracy of pressure gauges. Generally, a Multi-Flex™ Inflatable Plug inserted fully into pipeline will begin slipping between 50% and 80% of the inflation pressure if it has an inflated pipe contact length of 1 ½ to 2 times the diameter, but even a head of 50% of the inflation pressure may cause slippage with some liquids. The inflation pressure is also subject to temperature change and debris or protrusions in the pipeline that could rupture the plug. The inflation pressure should be monitored and plugs anchored and/or mechanically blocked when slippage may cause property damage or injury. NEVER use a test pressure greater than the capacity of the weakest pipe or component in the system. NEVER use an inflatable plug when its failure would cause injury.

Products covered by one or more of the following patents: 4,565,222; 5,353,842; 5,901,752; 6,446,669; 6,568,429; 6,899,138 and other applications pending.

Trademarks are the properties of their respective owner(s).

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