Single Ended Inflatable Purge Dams — Argweld
Single ended inflatable purge dams suit closure welds, tees, tight bends and dome-end connections where tandem systems are impractical. Confirm the pipe bore, gas connections and a route for retrieval after welding.
Argweld single ended inflatable purge dams form a local barrier for weld purging where a connected pair of dams cannot be positioned. Typical applications include closure welds, T-piece joints, tight bends and dome-end connections with access to retrieve the dam.
Choose the arrangement around the joint
A single dam can work with another suitable barrier elsewhere in the pipe. Plan the complete purge space, gas inlet, exhaust and retrieval route before selecting the equipment. Where both sides of the joint are accessible, compare PurgElite tandem purging systems or QuickPurge III inflatable systems.
Gas connections and monitoring
The listed arrangement includes a combined inflation/purge hose, an additional gas inlet and an exhaust/monitoring connection. Justram’s configuration identifies black for inflation/purge, blue for additional gas and red for monitoring. Check the labels and instructions on the supplied unit before connecting it.
Additional gas flow may support the required purge arrangement, but does not by itself guarantee a colour-free weld or the absence of porosity. Use a suitable weld purge monitor and follow the oxygen limit and interpass requirements in the welding procedure.
Sizes and fit
Standard Argweld single ended weld purge dams are available for pipe diameters from 6 to 88 inches (152 to 2,235 mm). Use the actual inside diameter when selecting from the sizing reference below, and ask Justram about custom sizes or configurations.
| Part Number | Pipe Size | ID Range |
|---|---|---|
| APD0006 | 6” | 140 - 165 mm |
| APD0007 | 7” | 165 - 191 mm |
| APD0008 | 8” | 191 - 216 mm |
| APD0009 | 9” | 216 - 241 mm |
| APD0010 | 10” | 241 - 267 mm |
| APD0011 | 11” | 267 - 292 mm |
| APD0012 | 12” | 292 - 318 mm |
| APD0013 | 13” | 318 - 343 mm |
| APD0014 | 14” | 343 - 368 mm |
| APD0015 | 15” | 368 - 394 mm |
| APD0016 | 16” | 394 - 419 mm |
| APD0017 | 17” | 419 - 445 mm |
| APD0018 | 18” | 445 - 470 mm |
| APD0019 | 19” | 470 - 495 mm |
| APD0020 | 20” | 495 - 521 mm |
| APD0021 | 21” | 521 - 546 mm |
| APD0022 | 22” | 546 - 572 mm |
| APD0023 | 23” | 572 - 597 mm |
| APD0024 | 24” | 597 - 622 mm |
| APD0025 | 25” | 622 - 648 mm |
| APD0026 | 26” | 648 - 673 mm |
| APD0027 | 27” | 673 - 699 mm |
| APD0028 | 28” | 699 - 724 mm |
| APD0029 | 29” | 724 - 749 mm |
| APD0030 | 30” | 749 - 775 mm |
| APD0031 | 31” | 775 - 800 mm |
| APD0032 | 32” | 800 - 826 mm |
| APD0033 | 33” | 826 - 851 mm |
| APD0034 | 34” | 851 - 876 mm |
| APD0035 | 35” | 876 - 902 mm |
| APD0036 | 36” | 902 - 927 mm |
| APD0037 | 37” | 927 - 953 mm |
| APD0038 | 38” | 953 - 978 mm |
| APD0039 | 39” | 978 - 1003 mm |
| APD0040 | 40” | 1003 - 1029 mm |
| APD0041 | 41” | 1029 - 1054 mm |
| APD0042 | 42” | 1054 - 1080 mm |
| APD0043 | 43” | 1080 - 1105 mm |
| APD0044 | 44” | 1105 - 1130 mm |
| APD0045 | 45” | 1130 - 1156 mm |
| APD0046 | 46” | 1156 - 1181 mm |
| APD0047 | 47” | 1181 - 1207 mm |
| APD0048 | 48” | 1207 - 1232 mm |
| APD0049 | 49” | 1232 - 1257 mm |
| APD0050 | 50” | 1257 - 1283 mm |
| APD0051 | 51” | 1283 - 1308 mm |
| APD0052 | 52” | 1308 - 1334 mm |
| APD0053 | 53” | 1334 - 1359 mm |
| APD0054 | 54” | 1359 - 1384 mm |
| APD0055 | 55” | 1384 - 1410 mm |
| APD0056 | 56” | 1410 - 1435 mm |
| APD0057 | 57” | 1435 - 1461 mm |
| APD0058 | 58” | 1461 - 1486 mm |
| APD0059 | 59” | 1486 - 1511 mm |
| APD0060 | 60” | 1511 - 1537 mm |
| APD0061 | 61” | 1537 - 1562 mm |
| APD0062 | 62” | 1562 - 1588 mm |
| APD0063 | 63” | 1588 - 1613 mm |
| APD0064 | 64” | 1613 - 1638 mm |
| APD0065 | 65” | 1638 - 1664 mm |
| APD0066 | 66” | 1664 - 1689 mm |
| APD0067 | 67” | 1689 - 1715 mm |
| APD0068 | 68” | 1715 - 1740 mm |
| APD0069 | 69” | 1740 - 1765 mm |
| APD0070 | 70” | 1765 - 1791 mm |
| APD0071 | 71” | 1791 - 1816 mm |
| APD0072 | 72” | 1816 - 1842 mm |
| APD0730 | 73” | 1842 - 1867 mm |
| APD0074 | 74” | 1867 - 1892 mm |
| APD0075 | 75” | 1892 - 1918 mm |
| APD0076 | 76” | 1918 - 1943 mm |
| APD0077 | 77” | 1943 - 1969 mm |
| APD0078 | 78” | 1969 - 1994 mm |
| APD0079 | 79” | 1994 - 2019 mm |
| APD0080 | 80” | 2019 - 2045 mm |
| APD0081 | 81” | 2045 - 2070 mm |
| APD0082 | 82” | 2070 - 2096 mm |
| APD0083 | 83” | 2096 - 2121 mm |
| APD0084 | 84” | 2121 - 2146 mm |
| APD0085 | 85” | 2146 - 2172 mm |
| APD0086 | 86” | 2172 - 2197 mm |
| APD0087 | 87” | 2197 - 2223 mm |
| APD0088 | 88” | 2223 - 2248 mm |
Confirm suitability and retrieval
Provide pipe dimensions, joint layout, heat exposure and the proposed retrieval method when requesting a quotation. Four pull tags around the circumference support positioning and retrieval after the joint has cooled. Position the dam at least 4 inches away from the welding zone; the standard construction is heat resistant up to 80°C (176°F). These are weld purge dams; this listing does not establish a pressure-test or pipeline-isolation rating. For heated work, review HotPurge systems. If an inflatable dam cannot be recovered, consider water-soluble weld purge film where the planned washout process permits it.
