Structural Steel Pipes

Trio Steel is one of the leading suppliers of Structural steel pipes mainly been S235, S275, S355, S420 & S460. These pipes are available in seamless & welded categories with many variants basically depending on the heat treatment & impact testing. The EN 10210 is a European Standard prepared for Structural steel. The common categories which are widely used are:

As mentioned above, the product can be delivered in the conditions as per below:
Qualities – JR, J0, J2, and K2 – Hot Finished
Qualities – N and NL – Normalized includes normalized rolled
S stands for Structural & H stands for Hollow Tube
The letters JR, J0 & J2 signify the different temperatures of impact testing i.e. +20 Deg C, 0 Deg C, – 20 Deg C & -50 Deg C.

For any further technical queries, please email us or call us and we will be happy to provide you the details and also supply high-quality pipes

Carbon Steel Pipes

Carbon Steel Pipes & Its Uses:

Carbon Steel Pipes is the most commonly used material in all industries for process piping. It is preferred due to its wide availability, high strength, and good weldability, for example, screwed, socket-welded, and butt-welded. They are known as carbon steel pipes as carbon is the main alloying element and its properties are defined by the amount of carbon it has. Carbon Steel pipe should be selected for the required strength and durability required for the application checking the requirement of Yield Strength, Tensile Strength, ductility, and machinability required to join it. The pipe must withstand the pressure, temperature, and corrosion conditions of the application. These requirements are met by selecting a pipe made to an appropriate ASTM or API standard. 

 

In the API categories you have the following options:

  1. API 5L GR B PSL1/PSL2 Seamless & Welded Pipes
  2. API 5L GR X42 PSL1/PSL2 Seamless & Welded Pipes
  3. API 5L GR X46 PSL1/PSL2 Seamless & Welded Pipes
  4. API 5L GR X52 PSL1/PSL2 Seamless & Welded Pipes
  5. API 5L GR X56 PSL1/PSL2 Seamless & Welded Pipes
  6. API 5L GR X60 PSL1/PSL2 Seamless & Welded Pipes
  7. API 5L GR X65 PSL1/PSL2 Seamless & Welded Pipes
  8. API 5L GR X70 PSL1/PSL2 Seamless & Welded Pipes
  9. API 5L GR X80 PSL1/PSL2 Seamless & Welded Pipes
  10. API 5L GR X100 PSL1/PSL2 Seamless & Welded Pipes
  11. API 5L GR X120 PSL1/PSL2 Seamless & Welded Pipes

 

In the ASTM Categories you have the following options:

  1. ASTM A106 GR B Seamless & Welded Pipes
  2. ASTM A106 GR C Seamless & Welded Pipes
  3. Low Temp ASTM A333 GR 6 Seamless & Welded Pipes
  4. ASTM A671/A672 CB/CC 60/65/60 EFW Pipes.

 

Uses & Applications:

Industries across the world in different fields use various carbon steel pipes in seamless/welded options depending on the use. Some of the uses are:

  1. Transporting Oil & Gas
  2. Drilling & Offshore Applications
  3. FPSOs & Building foundations
  4. High-Pressure Applications
  5. Transporting water & wastewater underground
  6. Chemical Processing
  7. Rigs Building

 

At Rexal Tubes, we offer a wide variety of these carbon steel pipes along with the technical advice on what material will be suitable depending on the use.

 

TRIO STEEL – HIC TESTED/SOUR SERVICE STEEL SUPPLIER

HIC (Hydrogen Induced Cracking) occurs when carbon steel is exposed to hydrogen sulphide (H2S) and is the direct result of electrochemical corrosion reactions between the sour service or wet H2S environment. Particularly common to the Oil and Gas Industry where the use of steel pressure vessels is widespread, the risk of this should be considered when hydrogen sulphide partial pressure becomes greater than 3.5mbar. Carbon steel pressure vessels should not be affected by HIC damage where H2S levels are lower than this figure in a normal service life cycle. HIC is prevalent in wet H2S environments, which is often known as sour service and such cracking over a prolonged period of time without inspection, will reach a critical point and the steel component i.e. pressure vessel, could easily fail. Simply put, hydrogen induced cracking damage increases as the level of hydrogen sulphide increases.

 

To ensure that the steel used by various EPC Contractors & oil and gas industry it is essential to supply carbon steel pipes & fittings which meet the sour service environment requirement and are tested to assess their ability to exposure of hydrogen sulphide. We at Trio Steel are a pioneer in supply of various HIC Tested Products as below:

 

API 5L GR B PSL2 HIC TESTED PIPES

API 5L X42 PSL2 HIC TESTED PIPES

API 5L X46 PSL2 HIC TESTED PIPES

API 5L X52 PSL2 HIC TESTED PIPES

API 5L X56 PSL2 HIC TESTED PIPES

API 5L X60 PSL2 HIC TESTED PIPES

API 5L X65 PSL2 HIC TESTED PIPES

API 5L X70 PSL2 HIC TESTED PIPES

API 5L X80 PSL2 HIC TESTED PIPES

 

These pipes are available in both seamless and welded category depending on the sizes required. Apart from this we can also supply HIC Resistant Plates like ASTM/ASME A/SA 516 60/65/70 & subsequently the A671/A672 GR CC 60/65/70EFW PIPES

 

 

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 GradePlate UsedPlate GradeHeat Treatment
ASTM A671 GR. CA45 EFW pipes CL12Plain CarbonA 285/A 285M GRADE ANone
ASTM A671 GR. CA50 EFW pipes CL12Plain CarbonA 285/A 285M GRADE BNone
ASTM A671 GR. CA55 EFW pipes CL12Plain CarbonA 285/A 285M GRADE CNone
ASTM A671 GR. CB55 EFW pipes CL12Plain Carbon, KilledA515/A515M GRADE 55None
ASTM A671 GR. CB60 EFW pipes CL12Plain Carbon, KilledA515/A515M GRADE 60None
ASTM A671 GR. CB65 EFW pipes CL12Plain Carbon, KilledA515/A515M GRADE 65None
ASTM A671 GR. CB70 EFW pipes CL12Plain Carbon, KilledA515/A515M GRADE 70None
ASTM A671 GR. CC55 EFW pipes CL12Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 55None
ASTM A671 GR. CC60 EFW pipes CL12Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 60None
ASTM A671 GR. CC65 EFW pipes CL12Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 65None
ASTM A671 GR. CC70 EFW pipes CL12Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 70None
ASTM A671 GR. CA45 EFW pipes CL22Plain CarbonA 285/A 285M GRADE AStress Relieved
ASTM A671 GR. CA50 EFW pipes CL22Plain CarbonA 285/A 285M GRADE BStress Relieved
ASTM A671 GR. CA55 EFW pipes CL22Plain CarbonA 285/A 285M GRADE CStress Relieved
ASTM A671 GR. CB55 EFW pipes CL22Plain Carbon, KilledA515/A515M GRADE 55Stress Relieved
ASTM A671 GR. CB60 EFW pipes CL22Plain Carbon, KilledA515/A515M GRADE 60Stress Relieved
ASTM A671 GR. CB65 EFW pipes CL22Plain Carbon, KilledA515/A515M GRADE 65Stress Relieved
ASTM A671 GR. CB70 EFW pipes CL22Plain Carbon, KilledA515/A515M GRADE 70Stress Relieved
ASTM A671 GR. CC55 EFW pipes CL22Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 55Stress Relieved
ASTM A671 GR. CC60 EFW pipes CL22Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 60Stress Relieved
ASTM A671 GR. CC65 EFW pipes CL22Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 65Stress Relieved
ASTM A671 GR. CC70 EFW pipes CL22Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 70Stress Relieved
ASTM A671 GR. CA45 EFW pipes CL32Plain CarbonA 285/A 285M GRADE ANormalized
ASTM A671 GR. CA50 EFW pipes CL32Plain CarbonA 285/A 285M GRADE BNormalized
ASTM A671 GR. CA55 EFW pipes CL32Plain CarbonA 285/A 285M GRADE CNormalized
ASTM A671 GR. CB55 EFW pipes CL32Plain Carbon, KilledA515/A515M GRADE 55Normalized
ASTM A671 GR. CB60 EFW pipes CL32Plain Carbon, KilledA515/A515M GRADE 60Normalized
ASTM A671 GR. CB65 EFW pipes CL32Plain Carbon, KilledA515/A515M GRADE 65Normalized
ASTM A671 GR. CB70 EFW pipes CL32Plain Carbon, KilledA515/A515M GRADE 70Normalized
ASTM A671 GR. CC55 EFW pipes CL32Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 55Normalized
ASTM A671 GR. CC60 EFW pipes CL32Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 60Normalized
ASTM A671 GR. CC65 EFW pipes CL32Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 65Normalized
ASTM A671 GR. CC70 EFW pipes CL32Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 70Normalized
ASTM A672 GR. CA45 EFW pipes CL12Plain CarbonA 285/A 285M GRADE ANone
ASTM A672 GR. CA50 EFW pipes CL12Plain CarbonA 285/A 285M GRADE BNone
ASTM A672 GR. CA55 EFW pipes CL12Plain CarbonA 285/A 285M GRADE CNone
ASTM A672 GR. CB55 EFW pipes CL12Plain Carbon, KilledA515/A515M GRADE 55None
ASTM A672 GR. CB60 EFW pipes CL12Plain Carbon, KilledA515/A515M GRADE 60None
ASTM A672 GR. CB65 EFW pipes CL12Plain Carbon, KilledA515/A515M GRADE 65None
ASTM A672 GR. CB70 EFW pipes CL12Plain Carbon, KilledA515/A515M GRADE 70None
ASTM A672 GR. CC55 EFW pipes CL12Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 55None
ASTM A672 GR. CC60 EFW pipes CL12Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 60None
ASTM A672 GR. CC65 EFW pipes CL12Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 65None
ASTM A672 GR. CC70 EFW pipes CL12Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 70None
ASTM A672 GR. CA45 EFW pipes CL22Plain CarbonA 285/A 285M GRADE AStress Relieved
ASTM A672 GR. CA50 EFW pipes CL22Plain CarbonA 285/A 285M GRADE BStress Relieved
ASTM A672 GR. CA55 EFW pipes CL22Plain CarbonA 285/A 285M GRADE CStress Relieved
ASTM A672 GR. CB55 EFW pipes CL22Plain Carbon, KilledA515/A515M GRADE 55Stress Relieved
ASTM A672 GR. CB60 EFW pipes CL22Plain Carbon, KilledA515/A515M GRADE 60Stress Relieved
ASTM A672 GR. CB65 EFW pipes CL22Plain Carbon, KilledA515/A515M GRADE 65Stress Relieved
ASTM A672 GR. CB70 EFW pipes CL22Plain Carbon, KilledA515/A515M GRADE 70Stress Relieved
ASTM A672 GR. CC55 EFW pipes CL22Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 55Stress Relieved
ASTM A672 GR. CC60 EFW pipes CL22Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 60Stress Relieved
ASTM A672 GR. CC65 EFW pipes CL22Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 65Stress Relieved
ASTM A672 GR. CC70 EFW pipes CL22Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 70Stress Relieved
ASTM A672 GR. CA45 EFW pipes CL32Plain CarbonA 285/A 285M GRADE ANormalized
ASTM A672 GR. CA50 EFW pipes CL32Plain CarbonA 285/A 285M GRADE BNormalized
ASTM A672 GR. CA55 EFW pipes CL32Plain CarbonA 285/A 285M GRADE CNormalized
ASTM A672 GR. CB55 EFW pipes CL32Plain Carbon, KilledA515/A515M GRADE 55Normalized
ASTM A672 GR. CB60 EFW pipes CL32Plain Carbon, KilledA515/A515M GRADE 60Normalized
ASTM A672 GR. CB65 EFW pipes CL32Plain Carbon, KilledA515/A515M GRADE 65Normalized
ASTM A672 GR. CB70 EFW pipes CL32Plain Carbon, KilledA515/A515M GRADE 70Normalized
ASTM A672 GR. CC55 EFW pipes CL32Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 55Normalized
ASTM A672 GR. CC60 EFW pipes CL32Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 60Normalized
ASTM A672 GR. CC65 EFW pipes CL32Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 65Normalized
ASTM A672 GR. CC70 EFW pipes CL32Plain Carbon, Killed, Fine GrainedA516/A516M GRADE 70Normalized

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.

 

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 the 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 are mostly used in Oil and Gas Industries.
Trio Steel API 5L Pipes suppliers further adhere to the International Organization for Standardization ISO 3183 and it specifies the production of two product specification levels (PSLs): API 5L PSL1 Vs PSL2 Pipes. The previous is a standard quality for line pipe though the last conveys extra mechanical, synthetic properties, and testing requirements. These pipes are recognized and trusted names for organizations working in the oil, flammable gas, and petrol area just as different areas where API 5L Pipes are needed to do tasks.

API 5L PSL1 Vs PSL2 Pipes

PARAMETERPSL1PSL2
Grade RangeA25 through X70B through X80
Size range0.405″ through 80″4.5″ through 80″
Type of endsPlain end, Threaded end,
Bevelled end special coupling pipes
Plain end
Seam weldingAll methods:
continuous welding
limited to A25
All methods:
except continuous welding
and laser welding
Electric welds: welder frequencyNo minimumkHz minimum 100
Heat treatment of electric weldsRequired for grades >X42Required for all grades
(B through X80)
Chemistry: Max C for Seamless pipe0.28% for grades ≥ B0.24%
Chemistry: Max C for Welded pipe0.26% for grades ≥ B0.22%
Chemistry: Max P0.030% for grades ≥ A0.03%
Chemistry: Max S0.03%0.02%
Carbon equivalent:Only when purchaser
specifies SR18
Maximum required
for each grade
Yield strength, maximumNoneMaximum for each grade
UTS (Ultimate Tensile Strength)
maximum
NoneMaximum for each grade
Fracture toughnessNone requiredRequired for all grades
Non-destructive inspection
of Seamless
Only when purchaser
specifies SR4
SR4 mandatory
Repair by welding of the pipe body
plate, and skelp
PermittedProhibited
Repair by welding of weld seams
without filler metal
Permitted by agreementProhibited
CertificationTraceable only until
all tests are passed
Certificates (SR15.1)
mandatory
TraceabilityTraceable only until
all tests are passed
unless SR15 is specified
Traceable after completion
of tests
(SR15.2) mandatory

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