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FAQ's
ENQUIRY
What are the different types of pipes and how are they classified?
 
The manufacturing processes decides the dominant characteristics of the pipe. Therefore the classification of the pipes is named after the method of its manufacturing. The various classifications are :-
 
ERW – Electric Resistance Welded
 
EFSW – Electric Fusion Spiral Welded
 
SAW – Submerged Arc Welded
 
SSAW- Spiral Seam Arc Welded
 
SEAMLESS HFS –pipes manufactured by piercing & rolling the heated billet are known as HFS pipe
 
SEAMLESS CDS – hollows/or hfs pipes are further drawn by cold drawing method.
 
E.Fs.W – Electric Fusion Welded
 
What are the differences between Pipes and Tubes ?
 
Pipes & tubes are basically hollow bar,the diffrentiaition is mainly depending on its end use,& its dimension designation.
 
- Tubes are usually thin walled sections. Their wall thickness ranges from 0.3mm to 12.7 mm. The wall thickness are specified in Gauges as BWG/SWG. Pipes have range of wall thickness from 2mm to 65mm.
 
- Tubes are numerically identical to the size of their ODs. The wall thickness specified in Gauges as BWG/SWG. For example, a ¾ inch tube has OD, which is equal to
 
¾ x 25.4 = 19.05mm which is equivalent to the size of its designation.
 
- Where as Pipe dimensions have Outer Diameter that is numerically larger than the designated size. For example, a 4-inch NB, the OD is not equal to 
 
4 x 25.4 = 101.6mm BUT its equal to 4.5x25.4=114.3mm
 
- Tubes can also be easily coiled but the thickness and rigidity of the pipes makes them harder to bend.
 
- Tubes can be used to connect parts of machines such as Heat exchangers, condensers and as a result are subjected to both internal and external pressures. Pipes are generally used to connect large machines to other large machines and are generally not subjected to external pressures.
 
What are the various standard test conducted on a seamless pipes after manufacture?
 
Pipes undergo rigorous testing to ensure that they are of the highest quality. They are done specifically to meet certain requirements. The mandatory tests are grouped as:-
 
Non – Destructive
  • HYDRO TESTING
  • (UT) ULTRASONIC TEST
  • (ECT) EDDY CURRENT TEST
  • MPI (MAGNETIC PARTICLE INSPECTION
  • PMI (POSITIVE MATERIAL IDENTIFICATION
Destructive
  • MECHANICAL TESTING FOR TENSILE STRENGTH
  • MECHANICAL TESTING FOR IMPACT
  • MECHANICAL TEST FOR FLATTENING
  • MECHANICAL TEST FOR FLARING
 
Explain what is the significance of each of the following test and what can be known from them.
 
Hydro test – This is performed to check the leakge as a result of manufacturing defects
 
Eddy Current Test – This is done to ensure there are no surface defects on the inner / outer surface areas
 
Magnetic Particle Test – to detect surface and sub surface discontinuity, surface cracks and minor ruptures
 
Ultra Sonic Testing – This is performed to detect flaws such as laps, laminations, blowholes and cracks
 
Positive Material Identification – To verify the chemical constituents of the pipes and check for percentage of alloying elements such as Chrome, Molybdenum, Nickel, Manganese, etc. without destroying the pipe so as to not mix up different grades of pipes like P11, P5, P22, P9, SS316, SS304, SS321 etc.
 
What is the relevance of the colour coding system at ESP?
 

All pipe look the same. A major method of identification for its different grade and quality is the stenciling on the pipe. During storage and handling there are chances of this stenciling getting erased. This leads to mix up of the grades of the pipe. Hence a distinctive color coding system prevents such grade mix up that could lead to a wrong delivery. Color coding being more visually distinctive can easily be identified by all, hence ensures correct delivery to the customer.

 
What does the seven year traceability module ensure?
 

Defective pipes that have been rejected by the manufacturer enter the trade market when unscrupulous traders buy the pipes as scrap and sell them as a genuine product hence making huge profits.

 
Evergreen has formulated a unique, customized method of traceability to ensure that our customers get only absolutely genuine material. We maintain a complete record of all documents that prove both the authenticity of a particular pipe and the link to its manufacturer, since poor quality of pipes can be disastrous and can cripple operations. Evergreen’s quality control plays a vital role in preventing this.
 
In case of an unforeseen adversity we can quickly and efficiently retrieve information of the specific pipe, and trace its origin to its corresponding manufacturer and the supplies made for that particular lot.
 
Hence this unique method of traceability has been built to ensure that the customers have complete information of the transaction,even after elongated lapse in time.
 
How is the integrated ERP system beneficial to the customer?
 

Evergreen’s integrated ERP system will enable the customer to be continuously aware of the position of their consignment. Thereby reducing any gap in communication and improving transparency.

 
What methods have you taken to ensure the effective stocking of pipes?
 

Evergreen has been the first to build a state-of-the-art warehousing facility with modernized racking system. The warehouse has a total area of 80,000 sq. ft. of which 25,000 sq. ft is enclosed space dedicated to stocking the pipes. With a constantly monitored, clean and dry atmosphere, we ensure a safe warehouse for the effective storing of pipes.

 
     
  ACCREDITATIONS
 
 
Evergreen has earned the distinction of a number of certifications
 
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