In many industries, pipes are a means of conveyance. Businesses across the world like the oil and gas & the petroleum industries, ferry across different media from the refinery to the site. These mediums include chemicals, oil, gas, or other fluids and steam. At any given point, media like these could cause some damage to the pipe. So the system would require being closed off and leads to a loss in productivity. While a change is expensive, it may not be necessary. We offer several emergency services - especially pipe repair, coating, or pipe sleeve.
Although quality control checks carried out at our factory are stringent, there are several reasons for a product to require restoration. At Ashtapad Overseas, we understand the possibility of conducting repair work will reduce the overall cost of the application. Therefore, we offer our clients emergency services such as pipe repair. A successful repair service requires an in-depth study of the problem. Hence, our team of highly skilled engineers take a look into the issue while also documenting it to achieve the best possible result. Their response time to any challenging subject is customized to meet our client's requirements.
To seek council with regards to acceptable repair methods, we refer to codes and standards of the industry. There are several options which we can put to use during pipe repairing. According to these industry standards, below is a list complied with all the commonly acceptable repair practices -
- Replacement as a Cylinder
- Removal by methods of Grinding
- Depositing Weld Metal
- Reinforcement of Full Encirclement Sleeve or as known as Type A
- Pressure-Containing Full Encirclement Sleeve or as known as Type B
- Composite Sleeve
- Use of Mechanical Bolt-on Clamps
- Hot Tap
- Use of Fittings
How to select an appropriate method to repair a pipe?
At any given point, the repair work varies from industry to industry. While one method may work for an issue, the same approach may not be suitable for the other problem. The truth being, even if many arrangements are still acceptable according to industry norms, enforcing them is a matter of time, availability or material, or the additional procedures as well. They collectively impact a pipe in a system. A few techniques may be practical, but they may not be applicable or appropriate. To go ahead with the repair work, one has to ensure the validity of the technique by comparing it to the standards, codes, and best industry practices. Per the industry standards, the three methods to restore injurious defects include - Replacement as a Cylinder, Type B Sleeve, as well as the use of mechanical Bolt-on Clamps.
In the instance where a seam or girth weld could be an effect of a defect, damage, or anomaly, the method for repair has limitations. The mobility or embrittlement of the weld limits the repair method. In the gas industry, it is possible to repair a 3% dent with 5% stress that is affected by a delicate weld by the use of the following techniques - Replacement as a Cylinder or a Type B Sleeve, or by the use of a mechanical Bolt-on Clamp. However, if the same parameter is affected by a pliable weld, the following repair options are considered to be commercially viable - Composite Sleeve or Hot Tap or Type A Sleeve.
Coating is subjective to the application. One of the most common coat is galvanization, which layers the outer surface of the component with zinc. The popularly for these finishes stems from the fact that they provide some level of corrosion resistance. Since carbon steel and alloy steel pipes lack the corrosion resistance properties akin to that of stainless steel grades, most enterprises prefer hot-dip galvanized pipes.
Though plating is a form of a coat, the preference for the former is much higher, solely because the film is much thicker as compared to plating. Other types of film that suit carbon and alloy steel pipes include FBE or Fusion Bond Epoxy coating, Scotch Coating, or as known as Fletcher Coating, Synergy Wrap, and Spiral Wrap. We offer any of the above coat as an emergency service.
Ready stock for Shutdown, Emergency or Project Rush
|Material Specification||Alloy Grade||Steel||Manufacturing Technique||Product information|
|ASTM A53 / SA53||Gr. B||Carbon||SMLS
|Black and Galvanized,
Plain-End, Coupled, Threaded
|ASTM A106 / SA106||Gr. B/C||Carbon||SMLS||Used for High Temperature Services|
|ASTM A333 / SA333||Gr. 1/6||Carbon||SMLS||Suitable for Low Temperature Services|
|ASTM A335 / SA335||Gr. P5, P11
|Alloy||SMLS||Used for High Temperature Services|
|API 5L||Gr.B, PSL1/2, X42,
X52, X60, X65
|Seamless, Welded, ERW Pipe Line|
|ASTM A671 / SA671||Plate Grade||Carbon
|Rolled & Welded (EFW)||EFW Pipes for Atmospheric and Lower Temperatures|
|ASTM A672 / SA672||Plate Grade||Carbon
|Rolled & Welded (EFW)||EFW Pipes for High Pressure Service at Moderate Temperatures|
|ASTM A691 / SA691||Plate Grade||Carbon
|Rolled & Welded||EFW Pipes for High Pressure Service at Extreme Temperatures|
|ASTM A312 / SA312||Gr. 304, 310, 316,
321, 347 (L/H)
|Seamless, Welded, ERW and Heavily Cold Worked
Stainless Steel Pipes
|ASTM A213 / SA213||Gr. T5, T9, T11,
Gr. 304, 310, 316,
321, 347 (L/H)
|SMLS||Boiler, Superheater and Heat-Exchanger Tubes - Seamless Ferritic and Austenitic Alloy-Steel|
|ASTM A513 / SA513
Type 5 (DOM)
|SAE 1018 - 1026||Carbon
|Welded||Carbon and Alloy Steel ERW Mechanical Tubing|
|ASTM A519||SAE 1026, 4130
|SMLS||Carbon and Alloy Steel ERW Mechanical Tubing|