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  • export@ashtapad.com

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.

Repair

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
After the performance of a more detailed and rigorous analysis, the use of any of the following methods could be acceptable. However, this aside, a substitute repair technique that is not a derivative of the industry standard, but can still manage to work out with the alignment of the best practices, codes, and specifications are perfectly acceptable.

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

Coating Types

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
Welded
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
P22, P91
Alloy SMLS Used for High Temperature Services
API 5L Gr.B, PSL1/2, X42,
X52, X60, X65
Carbon SMLS
Welded
Seamless, Welded, ERW Pipe Line
ASTM A671 / SA671 Plate Grade Carbon
Alloy
Rolled & Welded (EFW) EFW Pipes for Atmospheric and Lower Temperatures
ASTM A672 / SA672 Plate Grade Carbon
Alloy
Rolled & Welded (EFW) EFW Pipes for High Pressure Service at Moderate Temperatures
ASTM A691 / SA691 Plate Grade Carbon
Alloy
Rolled & Welded EFW Pipes for High Pressure Service at Extreme Temperatures
ASTM A312 / SA312 Gr. 304, 310, 316,
321, 347 (L/H)
 Stainless SMLS
Welded
Seamless, Welded, ERW and Heavily Cold Worked
Stainless Steel Pipes
ASTM A213 / SA213 Gr. T5, T9, T11,
T22. T91
Gr. 304, 310, 316,
321, 347 (L/H)
Alloy

Stainless

SMLS Boiler, Superheater and Heat-Exchanger Tubes - Seamless Ferritic and Austenitic Alloy-Steel
ASTM A513 / SA513
Type 5 (DOM)
SAE 1018 - 1026 Carbon
Alloy
Welded Carbon and Alloy Steel ERW Mechanical Tubing
ASTM A519 SAE 1026, 4130
4140, 4142
Carbon
Alloy
SMLS Carbon and Alloy Steel ERW Mechanical Tubing

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