Dinesh Metal Industries is one of the major exporter & suppliers of NACE pipes for applications in oil & gas, LNG, Thermal & Nuclear Power Plants, Chemical Industries, Fertilizers Plants, (petro) chemical, shipbuilding, desalination, water treatment, energy industries, EPC and Pipes for General Engineering Purpose. We have continuous stock of 5000 Ton of Carbon Steel, Alloy Steel, and Boiler Tube, Line Pipe, Drill Pipe (Drill Rods) manufactured at PQF Mill. All Material is provided with MTC (EN:10204:3. 1) or NABL Approved LAB reflecting – Yield Strength, Tensile, Hardness, HIC, Sour Service, NACE, MR 0175, MR 0103 and Hydro Pressure of Pipe. Material Temperature and Pressure Rating, Material Specification, Pipe Weight, Material Density, DATA Sheet, Equivalent Grade and Price List can be provided on request.
NACE pipe can be supplied in two specifications that provide guidance on reducing the risk of in-service cracking, one of these also being an ISO standard. The major difference between these two primary specifications is the definition the environmental and service conditions for sour service.
The first standard, ANSI/NACE MR0175/ISO 15156, Petroleum and natural gas industries – Materials for use in H2S-containing environments in oil and gas production, is intended for offshore.
Applications and NACE MR0103, Materials Resistant to sulphide stress cracking in corrosive petroleum refining environments, for onshore process plant. The latter specification refers to a recommended practice document for controlling welding activities to ensure a low and acceptable weldment hardness;NACE SP0472, Methods and controls to prevent in-service environmental cracking of carbon steel weldments in corrosive petroleum refining environments.
Both MR0175 and MR0103 have virtually identical requirements for specifying parent metal properties of carbon steels for sour service; the principal additional requirement being a maximum hardness. All steels that have been cold-worked must be stress relief heat treated to ensure the hardness is less than 22HRC (Rockwell hardness, equivalent to 248Hv or 235HB). Carbon steels other than P1 can be used provided that their hardness is also less than 22HRC.
HIC test to evaluate the resistance of pipeline and pressure vessel plate steels to Hydrogen Inducted Cracking caused by hydrogen absorption from aqueous sulfide corrosion. An unstressed test specimen is exposed to a solution at ambient temperature and pressure and after a specified time, the test specimen is removed and evaluated.
Sulfide stress corrosion cracking (SSC) is a form of hydrogen embrittlement cracking which occurs when a susceptible material is exposed to a corrosive environment containing water and H2S at a critical level of applied or residual tensile stress. Deep wells containing H2S necessitates drill strings that combine high strength and Sulfide Stress Cracking (SSC) resistance. Conventional API 5D drill pipe and API Spec7 tool joints do not meet these requirements. This paper is aimed at evaluating the performances of new 95 ksi grade and new 105 ksi grade drill pipes for sour service. Mechanical properties and SSC resistance have been investigated on both pipes, tools and weld areas. Optimized chemical composition, manufacturing process and heat treatment are pointed out. We can provide Hydrogen Induced Cracking (HIC) and Sulfide stress corrosion cracking SSC Certified Pipe of Carbon and Alloy Line Pipe for Sour Service Application.

Dinesh Metal Industries is one of the major exporter & suppliers of NACE pipes for applications in oil & gas, LNG, Thermal & Nuclear Power Plants, Chemical Industries, Fertilizers Plants, (petro) chemical, shipbuilding, desalination, water treatment, energy industries, EPC and Pipes for General Engineering Purpose. We have continuous stock of 5000 Ton of Carbon Steel, Alloy Steel, and Boiler Tube, Line Pipe, Drill Pipe (Drill Rods) manufactured at PQF Mill. All Material is provided with MTC (EN:10204:3. 1) or NABL Approved LAB reflecting – Yield Strength, Tensile, Hardness, HIC, Sour Service, NACE, MR 0175, MR 0103 and Hydro Pressure of Pipe. Material Temperature and Pressure Rating, Material Specification, Pipe Weight, Material Density, DATA Sheet, Equivalent Grade and Price List can be provided on request.
NACE pipe can be supplied in two specifications that provide guidance on reducing the risk of in-service cracking, one of these also being an ISO standard. The major difference between these two primary specifications is the definition the environmental and service conditions for sour service.
The first standard, ANSI/NACE MR0175/ISO 15156, Petroleum and natural gas industries – Materials for use in H2S-containing environments in oil and gas production, is intended for offshore.
Applications and NACE MR0103, Materials Resistant to sulphide stress cracking in corrosive petroleum refining environments, for onshore process plant. The latter specification refers to a recommended practice document for controlling welding activities to ensure a low and acceptable weldment hardness;NACE SP0472, Methods and controls to prevent in-service environmental cracking of carbon steel weldments in corrosive petroleum refining environments.
Both MR0175 and MR0103 have virtually identical requirements for specifying parent metal properties of carbon steels for sour service; the principal additional requirement being a maximum hardness. All steels that have been cold-worked must be stress relief heat treated to ensure the hardness is less than 22HRC (Rockwell hardness, equivalent to 248Hv or 235HB). Carbon steels other than P1 can be used provided that their hardness is also less than 22HRC.
HIC test to evaluate the resistance of pipeline and pressure vessel plate steels to Hydrogen Inducted Cracking caused by hydrogen absorption from aqueous sulfide corrosion. An unstressed test specimen is exposed to a solution at ambient temperature and pressure and after a specified time, the test specimen is removed and evaluated.
Sulfide stress corrosion cracking (SSC) is a form of hydrogen embrittlement cracking which occurs when a susceptible material is exposed to a corrosive environment containing water and H2S at a critical level of applied or residual tensile stress. Deep wells containing H2S necessitates drill strings that combine high strength and Sulfide Stress Cracking (SSC) resistance. Conventional API 5D drill pipe and API Spec7 tool joints do not meet these requirements. This paper is aimed at evaluating the performances of new 95 ksi grade and new 105 ksi grade drill pipes for sour service. Mechanical properties and SSC resistance have been investigated on both pipes, tools and weld areas. Optimized chemical composition, manufacturing process and heat treatment are pointed out. We can provide Hydrogen Induced Cracking (HIC) and Sulfide stress corrosion cracking SSC Certified Pipe of Carbon and Alloy Line Pipe for Sour Service Application.