Difference Between A671 and A672 EFW Pipes

A671 and A672 areEFW (Electric-Fusion Welded) Carbon Steel Pipes used for atmospheric and lower temperatures applications (A671) and high-pressure service at moderate temperatures (A672). As mentioned above, A671 is used for atmospheric and lower temperature application and A672 is used for high-pressure service applications at moderate temperature. However, if we compare the details e.g. A672 Gr.C60 & A671 Gr. CC60; the raw material plate used is same for both pipes & final mechanical properties are same. Heat treatment is same. The only difference between the 2 grades is only in the testing requirements. A672 requires weld sample drawn from a 500ft length of pipe and allows you to double the samples in case, original sample fails. A671 requires weld sample drawn from a 200ft length of pipe with no provision for a rejected weld.

Understanding difference in different grades

We come across different grades amongst A671 and A672 categories like CA/CB/CC (signified the type of plate used) and also different classes like CL 12/22/32 etc. We will attempt to explain these differences in the below table with simplified classification.

EFW Pipe Grade Plate Used Plate Grade Heat Treatment
ASTM A671 GR. CA45 EFW pipes CL12 Plain Carbon A 285/A 285M GRADE A None
ASTM A671 GR. CA50 EFW pipes CL12 Plain Carbon A 285/A 285M GRADE B None
ASTM A671 GR. CA55 EFW pipes CL12 Plain Carbon A 285/A 285M GRADE C None
ASTM A671 GR. CB55 EFW pipes CL12 Plain Carbon, Killed A515/A515M GRADE 55 None
ASTM A671 GR. CB60 EFW pipes CL12 Plain Carbon, Killed A515/A515M GRADE 60 None
ASTM A671 GR. CB65 EFW pipes CL12 Plain Carbon, Killed A515/A515M GRADE 65 None
ASTM A671 GR. CB70 EFW pipes CL12 Plain Carbon, Killed A515/A515M GRADE 70 None
ASTM A671 GR. CC55 EFW pipes CL12 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 55 None
ASTM A671 GR. CC60 EFW pipes CL12 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 60 None
ASTM A671 GR. CC65 EFW pipes CL12 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 65 None
ASTM A671 GR. CC70 EFW pipes CL12 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 70 None
ASTM A671 GR. CA45 EFW pipes CL22 Plain Carbon A 285/A 285M GRADE A Stress Relieved
ASTM A671 GR. CA50 EFW pipes CL22 Plain Carbon A 285/A 285M GRADE B Stress Relieved
ASTM A671 GR. CA55 EFW pipes CL22 Plain Carbon A 285/A 285M GRADE C Stress Relieved
ASTM A671 GR. CB55 EFW pipes CL22 Plain Carbon, Killed A515/A515M GRADE 55 Stress Relieved
ASTM A671 GR. CB60 EFW pipes CL22 Plain Carbon, Killed A515/A515M GRADE 60 Stress Relieved
ASTM A671 GR. CB65 EFW pipes CL22 Plain Carbon, Killed A515/A515M GRADE 65 Stress Relieved
ASTM A671 GR. CB70 EFW pipes CL22 Plain Carbon, Killed A515/A515M GRADE 70 Stress Relieved
ASTM A671 GR. CC55 EFW pipes CL22 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 55 Stress Relieved
ASTM A671 GR. CC60 EFW pipes CL22 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 60 Stress Relieved
ASTM A671 GR. CC65 EFW pipes CL22 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 65 Stress Relieved
ASTM A671 GR. CC70 EFW pipes CL22 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 70 Stress Relieved
ASTM A671 GR. CA45 EFW pipes CL32 Plain Carbon A 285/A 285M GRADE A Normalized
ASTM A671 GR. CA50 EFW pipes CL32 Plain Carbon A 285/A 285M GRADE B Normalized
ASTM A671 GR. CA55 EFW pipes CL32 Plain Carbon A 285/A 285M GRADE C Normalized
ASTM A671 GR. CB55 EFW pipes CL32 Plain Carbon, Killed A515/A515M GRADE 55 Normalized
ASTM A671 GR. CB60 EFW pipes CL32 Plain Carbon, Killed A515/A515M GRADE 60 Normalized
ASTM A671 GR. CB65 EFW pipes CL32 Plain Carbon, Killed A515/A515M GRADE 65 Normalized
ASTM A671 GR. CB70 EFW pipes CL32 Plain Carbon, Killed A515/A515M GRADE 70 Normalized
ASTM A671 GR. CC55 EFW pipes CL32 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 55 Normalized
ASTM A671 GR. CC60 EFW pipes CL32 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 60 Normalized
ASTM A671 GR. CC65 EFW pipes CL32 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 65 Normalized
ASTM A671 GR. CC70 EFW pipes CL32 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 70 Normalized
ASTM A672 GR. CA45 EFW pipes CL12 Plain Carbon A 285/A 285M GRADE A None
ASTM A672 GR. CA50 EFW pipes CL12 Plain Carbon A 285/A 285M GRADE B None
ASTM A672 GR. CA55 EFW pipes CL12 Plain Carbon A 285/A 285M GRADE C None
ASTM A672 GR. CB55 EFW pipes CL12 Plain Carbon, Killed A515/A515M GRADE 55 None
ASTM A672 GR. CB60 EFW pipes CL12 Plain Carbon, Killed A515/A515M GRADE 60 None
ASTM A672 GR. CB65 EFW pipes CL12 Plain Carbon, Killed A515/A515M GRADE 65 None
ASTM A672 GR. CB70 EFW pipes CL12 Plain Carbon, Killed A515/A515M GRADE 70 None
ASTM A672 GR. CC55 EFW pipes CL12 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 55 None
ASTM A672 GR. CC60 EFW pipes CL12 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 60 None
ASTM A672 GR. CC65 EFW pipes CL12 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 65 None
ASTM A672 GR. CC70 EFW pipes CL12 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 70 None
ASTM A672 GR. CA45 EFW pipes CL22 Plain Carbon A 285/A 285M GRADE A Stress Relieved
ASTM A672 GR. CA50 EFW pipes CL22 Plain Carbon A 285/A 285M GRADE B Stress Relieved
ASTM A672 GR. CA55 EFW pipes CL22 Plain Carbon A 285/A 285M GRADE C Stress Relieved
ASTM A672 GR. CB55 EFW pipes CL22 Plain Carbon, Killed A515/A515M GRADE 55 Stress Relieved
ASTM A672 GR. CB60 EFW pipes CL22 Plain Carbon, Killed A515/A515M GRADE 60 Stress Relieved
ASTM A672 GR. CB65 EFW pipes CL22 Plain Carbon, Killed A515/A515M GRADE 65 Stress Relieved
ASTM A672 GR. CB70 EFW pipes CL22 Plain Carbon, Killed A515/A515M GRADE 70 Stress Relieved
ASTM A672 GR. CC55 EFW pipes CL22 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 55 Stress Relieved
ASTM A672 GR. CC60 EFW pipes CL22 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 60 Stress Relieved
ASTM A672 GR. CC65 EFW pipes CL22 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 65 Stress Relieved
ASTM A672 GR. CC70 EFW pipes CL22 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 70 Stress Relieved
ASTM A672 GR. CA45 EFW pipes CL32 Plain Carbon A 285/A 285M GRADE A Normalized
ASTM A672 GR. CA50 EFW pipes CL32 Plain Carbon A 285/A 285M GRADE B Normalized
ASTM A672 GR. CA55 EFW pipes CL32 Plain Carbon A 285/A 285M GRADE C Normalized
ASTM A672 GR. CB55 EFW pipes CL32 Plain Carbon, Killed A515/A515M GRADE 55 Normalized
ASTM A672 GR. CB60 EFW pipes CL32 Plain Carbon, Killed A515/A515M GRADE 60 Normalized
ASTM A672 GR. CB65 EFW pipes CL32 Plain Carbon, Killed A515/A515M GRADE 65 Normalized
ASTM A672 GR. CB70 EFW pipes CL32 Plain Carbon, Killed A515/A515M GRADE 70 Normalized
ASTM A672 GR. CC55 EFW pipes CL32 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 55 Normalized
ASTM A672 GR. CC60 EFW pipes CL32 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 60 Normalized
ASTM A672 GR. CC65 EFW pipes CL32 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 65 Normalized
ASTM A672 GR. CC70 EFW pipes CL32 Plain Carbon, Killed, Fine Grained A516/A516M GRADE 70 Normalized

The above classification should simplify any confusion with respect to different grades and classification. Apart from these, there are other classes like CL 10, CL13 and C42. The differences in due to Radiography and Test Pressure, for eh CL 10 does not need radiography as well as the pressure test, CL 13 does not need radiography but required Test Pressure, CL 42 needs the plate to be normalized as well as tempered with Radiography Testing and Test Pressure.

carbon steel fittings

Important Points for selecting best carbon steel fittings

carbon steel fittings

 

Important Points for selecting best carbon steel fittings :

If you have a new industrial project which includes pipe installation, you would want to select best material for laying down the pipes, elbows, flanges etc. In this context it would be useful to keep in mind a few of the following points:

  • Evaluate the magnitude of the project
  • Understand the scale of the implementation
  • Enumerate the liquids or gases the pipes are going to carry
  • The desired age or longevity of the structure

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Steel imports In India decline to 4.5 million tons in April-October 2016

Steel imports in India have declined upto 39 percent  to 4.5 million tons amid April-October of this financial over a similar period a year prior. Steel Minister Chaudhary  Birender  Singh has said that The government has made different strides in light of a legitimate concern for the local steel industry from unfair foreign competition. Since the start of 2014-15, the Indian steel industry has seen serious worry because of surge in imports from nations saddled with abundance limit and fall in household costs.

 

anti dumping duty on Steel

India imposes anti-dumping duty on steel imports from China

anti dumping duty on Steel

India imposes anti-dumping duty on steel imports from China

The commerce ministry had recently recommended a $25 per tonne import duty on metallurgical coke (met coke) which is a key raw material for the steel sector. The commerce ministry had recently recommended a $25 per tonne import duty on metallurgical coke (met coke) which is a key raw material for the steel sector.
Several domestic Steel makers has opposed the anti-dumping duty. Secretary general of Indian Steel Association argued that such a levy of anti-dumping duty on met coke will have a cost push effect on the steel sector in India.Imposition of any such duty will cause the price of finished steel to increase by Rs 700-1,500 a tonne. Several domestic Steel makers has opposed the anti-dumping duty. Secretary general of Indian Steel Association argued that such a levy of anti-dumping duty on met coke will have a cost push effect on the steel sector in India.Imposition of any such duty will cause the price of finished steel to increase by Rs 700-1,500 a tonne.
Met coke costs have about tripled since January this year since the time the case was started and it is at present administering around $350 a ton, without any indications of subsiding. Met coke costs have about tripled since January this year since the time the case was started and it is at present administering around $350 a ton, without any indications of subsiding.
Domestic steel makers fear that Imposition of anti-dumping duty will further worsen the already bad situation by increasing the prices of inputs though sale realisations have remained more or less flattish. Domestic steel makers fear that Imposition of anti-dumping duty will further worsen the already bad situation by increasing the prices of inputs though sale realisations have remained more or less flattish.

ASTM A691 GRADE 9 CR Alloy Steel Pipes

Alloy Steel P Grade Pipes

Alloy Steel P Grade Pipes Variants

ASTM A335 Pipe (ASME S/A335, Chrome-Moly) is a consistent ferritic Alloy-Steel Pipe for high temperature benefit. Pipe requested to this detail might be reasonable for bowing, flanging (van stoning), and comparable shaping operations, and for combination welding. Once in a while alluded to as “P Grade”, chrome moly pipe is prevalent in P-Grades P5, P9, P11, P22, and P91. The most well-known utilization of evaluations P11, P22, and P91 is in the power business and petro-substance plants, Grades P5 and P9 are regularly utilized as a part of refineries.

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Alloy Steel Pipes

What are Alloy Steel Pipes?

Alloy-Steel-Pipes

ASTM A335 Alloy Steel Pipes (ASME S/A335, Chorme-Moly) is a seamless ferritic Alloy Steel Pipes for high temperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding.  Sometimes referred to as “P Grade”, chome moly pipe is popular in P-Grades P5, P9, P11, P22, and P91.  The most common use of grades P11, P22, and P91 is in the power industry and petro-chemical plants,  Grades P5 and P9 are commonly used  in refineries.

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API 5L PSL1 Vs PSL2 Pipes

API 5L PSL1 Vs PSL2 Pipes

An API 5L pipe is manufactured by adhering to the specifications laid down by the International Organization for Standardization (ISO) 3183. It standardizes the criteria for the materials, equipment and offshore structures for petrochemical, petroleum and natural gas industries. PSL 1 and PSL 2 are the two Product Specification Levels that have been recognized by the technical committee which is mostly used in Oil and Gas Industries.

API 5L PSL1 Vs PSL2 Pipes

PARAMETER PSL1 PSL2
Grade Range A25 through X70 B through X80
Size range 0.405″ through 80″ 4.5″ through 80″
Type of ends Plain end, Threaded end,
Bevelled end special coupling pipes
Plain end
Seam welding All methods:
continuous welding
limited to A25
All methods:
except continuous welding
and laser welding
Electric welds: welder frequency No minimum kHz minimum 100
Heat treatment of electric welds Required for grades >X42 Required for all grades
(B through X80)
Chemistry: Max C for Seamless pipe 0.28% for grades ≥ B 0.24%
Chemistry: Max C for Welded pipe 0.26% for grades ≥ B 0.22%
Chemistry: Max P 0.030% for grades ≥ A 0.03%
Chemistry: Max S 0.03% 0.02%
Carbon equivalent: Only when purchaser
specifies SR18
Maximum required
for each grade
Yield strength, maximum None Maximum for each grade
UTS (Ultimate Tensile Strength)
maximum
None Maximum for each grade
Fracture toughness None required Required for all grades
Non-destructive inspection
of Seamless
Only when purchaser
specifies SR4
SR4 mandatory
Repair by welding of pipe body
plate,and skelp
Permitted Prohibited
Repair by welding of weld seams
without filler metal
Permitted by agreement Prohibited
Certification Traceable only until
all tests are passed
Certificates (SR15.1)
mandatory
Traceability Traceable only until
all tests are passed
unless SR15 is specified
Traceable after completion
of tests
(SR15.2) mandatory

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API 5L Pipe

Types Of API 5L Pipes?

What are the Types Of API 5L Pipes?

API 5L Pipe When authoring the standards, the technical committee recognized that there are two basic Product Specifications Levels (PSL) of technical requirements and therefore developed PSL 1 and PSL 2.

API 5L PSL1 Standards :

PSL-1 is a loose standard quality for line pipe. PSL 1 Pipes are used to distribute line pipes. Grades covered by this specification are A25, A, B and “X” Grades API 5L X42 PSL1 Pipes, API 5L X46 PSL1 Pipes, API 5L X52 PSL1 Pipes, API 5L X56 PSL1 Pipes, API 5L X60 PSL1 Pipes, API 5L X65 PSL1 Pipes, API 5L X70 PSL1 Pipes, API 5L X80 PSL1 Pipes. The two digit number following the “X” indicates the Minimum Yield Strength (in 000′s psi) of pipe produced to this grade.

API 5L PSL2 Standards :

PSL-2 contains additional testing requirement, stricter chemical physicals, along with different ceiling limits of mechanical properties, and require Charpy impact testing conditions. Furthermore, additional testing requirements under PSL-2 include CVN testing, non-destructive inspection of seamless products, Read more

Stainless-Steel-Pipes

What is Stainless Steel Pipe?

Stainless-Steel-PipesStainless Steel Pipes: Stainless steel is a versatile material comprised of a steel alloy and a small percentage of chromium—the addition of chromium adds to the material’s corrosion resistance, a trait that earned stainless steel its name. Because stainless steel is also low-maintenance, oxidation resistant, and doesn’t affect other metals it comes in contact with, it is frequently used in a large array of applications, especially in piping and tubing manufacturing. Let’s know more about Stainless Steel Pipes. What is Stainless Steel? Stainless steel, also known as inox steel and is an alloy with a minimum of 10.5%chromium content by mass. Stainless steel does not readily corrode, rust or stain with water as ordinary steel does. Stainless steels contain sufficient chromium to form a passive film of chromium oxide, which prevents further surface corrosion by blocking oxygen diffusion to the steel surface and blocks corrosion from spreading into the metal’s internal structure. Passivation occurs only if the proportion of chromium is high enough and oxygen is present. Stainless steel is used where both the properties of steel and corrosion resistance are required. Read more

API-5L-X100-DSAW-Pipe

What are API 5L Pipes?

API 5L Pipes:

API 5L Pipes are one of the main classifications of pipes. Let’s take a brief look at how they’re manufactured, Composition, Applications as well as some of the potential benefits they present.
What are API 5L Pipes?
API Stands for American Petroleum Institute, In General the API 5L specification provides standards for pipe suitable for use in conveying gas, water, and oil in the natural gas and oil industries.
The API 5L covers seamless and welded steel line pipe. It includes plain-end, threaded-end, and belled-end pipe, as well as through-the-flowline (TFL) pipe, and pipe with ends prepared for use with special couplings.

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