Nace Mr0103 Carbon Steel Tube

Carbon Steel Nace Mr0103 Seamless Pipe Exporter

ISO 17945 Pipe Stock, CS MR0103 ISO 17945 Pipe Suppliers in india

Nace Mr0103 Carbon Steel Tube

Nace Mr0103 Carbon Steel Tube

DIN EN ISO 17945 Pipe

DIN EN ISO 17945 Pipe

ISO 17945 NACE Pipe

ISO 17945 NACE Pipe

Tycoon piping is one of the leading suppliers & exporter for high quality Nace Mr0103 Carbon Steel Tube. NACE International has created significant standard relative to the use of materials in hydrogen sulfide which is MR0103 material Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments. In Carbon Steel Nace Mr0103 pipes Hydrogen sulfide isn't just a poisonous gas, but also can cause stress corrosion cracking in alloys and steels. For some situation of stress corrosion cracking (i.e. SSC), hydrogen sulfide near the surface of the steel breaks down during the corrosion reaction into atomic hydrogen(H) and iron sulphides(i.e. FeS).

This little hydrogen atom is so small to the point that it can easily direct into the iron crystals in the steel. At the point when another hydrogen atom comes along with it, they prefer to hang out together and they form hydrogen gas(H2). With enough exposure to hydrogen sulfide and more hydrogen atoms enters in steel, the hydrogen gas pressure increases in the voids in the steel until the it cracks from the inside out (this is called HIC) or the stress on the steel combines with the stress from inside the steel to cause SSC.

Table of content

NACE MR0103 CS Pipe Specification

Steel Grade API 5L Gr. A / B / X42 / X46 / X52 / X56 / X60 / X65 / X70 / X80 IN PSL1 & PSL2 With NACE MR 0175
Certification API
Schedule Schedule 20 - Schedule XXS
Min Wall Thickness 2.0 mm
Max Wall Thickness 250 mm
Seamless Pipe Min Size 1/2 inch
Seamless Pipe Max Size 24 inch
SAW or LSAW or HSAW or EFW Pipe Min Size 16 inch
SAW or LSAW or HSAW or EFW Pipe Max Size 100 inch
Color Silver, Black
Finishing Polished, Painted
Material Carbon Steel
Type Round
Minimum Order Quantity 2 Ton

Some notable material requirements of MR0103

  • Alloy steels are defined as steels with a chromium content of less than 10%, in essence, steels that contain alloying elements greater than the amounts allowed in carbon steels but not enough chromium to be considered stainless steels. This allows the use of more highly-alloyed materials than MR0175, such as C12 (9% Cr - 1% Mo). Also, there is no 1% nickel restriction as in MR0175, so the 3% Ni, impact-tested steels (such as LC3 castings) can be used.
  • Wrought S17400 and S15500, and cast CB7Cu-1 and CB7Cu-2 are allowed for general use. When S17400 or S15500 are used for pressure-retaining bolting, only the H1150M condition is allowed, and the hardness is limited to 29 HRC maximum. N04400, N04405, M35-1, M35-2, M30C, N05500 (alloy K500) and N07750 (alloy X750) are acceptable with hardness limits matching those in MR0175-2002.
  • MR0103 defines acceptable austenitic stainless-steel grades using a chemical composition range rather than listing each individual alloy, similar to MR0175-2003. MR0103 allows stainless steels with 0.10% maximum carbon to cover the high-temperature grades. Otherwise, requirements are similar to MR0175.
  • Welds in P-No. 1 carbon steel materials must be performed per NACE Standard RP0472 "Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments." This recommended practice includes much more rigorous requirements than MR0175. RP0472 includes three different methods for controlling heat-affected zone (HAZ) hardness, and requires production weld deposit hardness testing unless welding is performed using SMAW with E70XX fillers or GTAW with ER70S-X (except -6, -7, or -G) fillers. Deposit hardness testing is even required on minor repairs and welds that have received a PWHT. This can cause a problem when trying to "upgrade" a standard commercial casting to meet MR0103. Most foundries use multiple welding processes (SMAW, GTAW, GMAW, and FCAW) for repairs, and even SMAW and GTAW can be performed with fillers that aren't exempted. It's often difficult or impossible to determine where weld repairs have been performed, so it can't be determined where to perform weld deposit hardness tests. If the locations of the repairs cannot be determined, and it cannot be verified that an exempt process/filler combination has been used, it may be necessary to order a special casting per MR0103 requirements.

NACE MR-0103 Seamnless Pipe

Element Weight Percent
C 0.10 max.
Cr 16.0 min.
Ni 8.0 min.
Mn 2.0 max.
Si 2.0 max.
P 0.045 max.
S 0.04 max.

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