Steel Repair Sleeves
Allan Edwards has been providing total pipeline sleeve repair solutions since 1950. We manufacture the pipe repair sleeves, our patented sleeve installation jacks for the most reliable pipeline sleeve repair system in the industry.
The following animation shows the pipeline sleeve repair process.
Material used to form Half Sole Pipe Repair Sleeves are from Allan Edwards, Inc. stock structural quality carbon steel or pressure vessel quality carbon steel plates, which are to ASTM specifications, and in the following grades:
- ASTM A36 (structural; minimum yield 36,000 psi)
- ASTM A572 GR50 (structural; minimum yield 50,000 psi)
- ASTM A572 GR65 (structural; minimum yield 65,000 psi)
- ASTM A516 GR70 (pressure vessel; minimum yield 38,000 psi)
- ASTM A537 Class I (pressure vessel; minimum yield 50,000 psi) [limited stock]
The chemical composition does not exceed the percentages specified for the ASTM material ordered. Pipe repair sleeves are fabricated from plate with low carbon equivalency for good weldability.
The maximum allowable carbon equivalency (CE) of Allan Edwards' stock structural quality carbon steel plates will be based on the heat analysis.
The maximum allowable carbon equivalency (CE) of Allan Edwards' stock pressure vessel quality carbon steel plates will be based on the heat analysis, in most cases.
Upon receipt of stock steel plates, heat numbers will be checked and verified with the material test reports. Copies of material test reports will be kept on file and will be used to recheck and re-verify heat numbers prior to cutting material in first step of manufacture.
Half Sole is formed by rolling, or die forming without the use of heat treating.
Longitudinal edges of the Half Sole are beveled for welding, if requested, at 30° . The bevel are a mechanical type and/or produced by plasma torch burning.
Half Sole ends have sheared square edges for fillet welding, unless square end bevel is requested, and are available in maximum lengths of:
- Pipe O.D. Size | Sleeve Length
- 2" thru 3 1/2" = 5' 0"
- 4" thru 12" = 10' 0"
- 14" thru 16" = 8' 0"
- All sizes over 16" = 10' 0"
Milling of Half Sole for backing strips
Half Soles can be milled on the inside longitudinal edges for the backing strips. Depth of 1/16" (.0625) -0" + 1/32" and width of 5/8" (.625) -0 + 1/16" on each side. Outside longitudinal edges are beveled 30° (+5° - 0° ) for welding. Image below shows Half Sole with one side milled for backing strip and other side with backing strip in milled groove.
Backing strips are hot rolled commercial carbon steel sheet and strip of commercial quality, A-569/A1011 SS GR33 in coils and cut lengths having a maximum carbon of 0.15%. 1 1/4" wide, 16 gauge (.0598) with a tolerance of: min. .0538 - max. 0658, 10' long, pre-crimped (10 degree total bend).
ASTM steel composition of A 569/A1011 SS GR33:
|Carbon (max)||Manganese (max)||Phosphorus (max)||Sulfur (max)||Copper (when specified)|
Mechanical Properties and Testing
Mill test reports will be furnished on all materials. Stock plate is not available with a maximum hardness guarantee. Independent testing may be performed to check the hardness on stock plate. Additional independent testing available to include: destructive, magnetic particle, liquid penetrate, ultrasonic and radiographic.
Longitudinal edges are beveled to 30 degrees (+5 degrees -0 degrees), with a root face (land) of 1/16" (+-1/32"). This will be a mechanical type bevel or by plasma torch burning. Beveled ends are available upon request. Inside diameter (I.D.) of each Half Sole is fabricated to match the outside diameter (O.D.) of standard nominal line pipe (bare) with tolerances of:
|Wall Thickness||Sulfur (max)||Copper (when specified)|
|3/16", 1/4" plate||2" thru 12"||(+0"-1/8")|
|3/16", 1/4" plate||14" thru 42"||(+0"-1/4")|
|5/16" plate||6" thru 12"||(+0"-1/8")|
|5/16" plate||14" thru 42"||(+0"-3/16)|
|3/8" plate||8" thru 12"||(+1/8"-0")|
|3/8" plate||22" thru 42"||(+0"-1/4")|
|1/2" plate||12" thru 20"||(+1/16"-1/16")|
|1/2" plate||22" thru 42"||(+1/8"-1/8")|
Half Sole are manufactured so that when two (2) halves of the sleeve are placed on the pipe, their total circumference shall equal the circumference of the pipe minus a gap between the longitudinal edges on either side of 1/16" (-1/16"+1/32") for welding.
The Half Sole are thoroughly inspected visually for defects before shipment. All dimensions, including end and side preparation, are measured and verified. Any pipe repair sleeve not meeting the requirements for visual inspection or dimensional tolerance are rejected.
Marking and Shipping
Each piece of Half Sole are clearly marked with size, wall thickness, grade of steel plate, Allan Edwards' job number and customer purchase order number. All marking are made with permanent paint and the lettering shall be approximately one (1") inch high.
The Half Sole will be secured with steel banding and stacked in bundles of:
I.D. Size | Half Soles in Bundle
2" thru 12" = 5 per bundle
14" thru 30" = 4 per bundle
32" thru 48" = 3 per bundle
The Half Sole O.D. size and wall thickness will determine the use of nominal pieces of softwood between adjacent half sole pieces in a bundle to mitigate rubbing and abrasion during shipping.
Half Sole can be transported in a variety of ways to include LTL (class A, closed bed truck), oil field hauler (flat bed truck) or air freight. The method of transportation is dictated by the total weight of the order and/or the size of the sleeves.
Preliminary Half Sole Preparation
After the Half Sole length has been determined and the pipe repair sleeve has been cut (torch cut in the field), the circumferential ends are prepared. The backing strips, equal to the length of the half sole, are tack welded to the sleeve with one half designated for the bottom portion of the fitting. Tack weld shall be made in the groove of the weld prep side of the long seam of the fitting. The backing strip is pre-crimped and the legs of the "V", provided by the crimping, should face the inside radius of the fitting. The backing strip is centered in both directions of the length and the width of the strip before tack welding into position.
Half Sole position - the bottom half of the Half Sole (with backing strip attached) are placed under the carrier pipe with the edges of the backing strip barely touching both sides of the pipe. Pipe Jacks are beneficial in positioning the top Half Sole and can be driven from under the top Half Sole when the proper position is obtained. Spreader bar rigging should be considered when handling long Half Sole sections.
The top half are then be positioned over the carrier pipe using wedges on the ends of the top half of the Half Sole longitudinal seam to provide clearance for the backing strip (when the Half Sole is in position and down on the pipe) to fit underneath the top Half Sole half.
Manual Pipe Jack for Installing Sleeves
Allan Edwards custom made mechanical Pipe Jacks for installing steel Half Sole on steel pipe. Jacks are made for 2" through 42" pipe, and one Jack can be used for multiple sizes of pipe. You can't get a sturdier or more durable Pipe Jack. Jack comes with Cott-Roller chain for uniform pressure and fit.
Checking Line-Up and Gap
The longitudinal welds of the Half Sole may require positioning at positions other than three and nine o'clock. The gapping of the Half Sole weld groove is critical (longitudinal edges). The gap should be 1/16" (-1/16" +1/32") on each side. To obtain this gap, due to the variances in pipe O.D. tolerance, may require reduction of groove width by grinding or increasing the width utilizing a buttering technique. Be sure that circumferential ends of the Half Sole are a tight fit.
After the gap is visually checked for dimensional tolerances and any final adjustment made, the longitudinal seam shall be tack welded. The tack weld should tie-in both Half Sole edges and the backing strip material (caution is necessary not to burn through the backing strip to the carrier pipe). A welding machine setting should be made before starting the tacking process.
Girth Weld Sleeves
Girth Weld Sleeve - Allan Edwards Allan Edwards' Girth Weld Sleeves are used to reinforce a welded pipe joint. Girth Weld Sleeves are fabricated by using custom dies, which are configured to allow sufficient clearance for the weld seam. Weld Sleeves are sold as a set of two, 180° piece to make a full encirclement sleeve. The I. D. of the repair sleeve is designed to fit the O. D. of the pipe with clearance for the existing weld. Sleeve from 2" to 48" - Lengths of 4" to 20" depending on pipe size.
Fabricated Weld Sleeves
For Pipe Lines, Screw Collars and Dresser Couplings. Available in a design for easy installation. Fabricated Weld Sleeves range from 2" to 48" plus custom Fabricated in sleeve lengths and O.D.s