Bangdong Piping material selection

Piping material selection mainly depends on process conditions such as

• Fluid it transports;
• at what temperature
• at what pressure it transports.

Let’s try to understand this condition in depth.

1st, Process condition that will impact the selection of material is type of fluid it transport. For corrosive fluids, you have to go for higher corrosion resistance material as compared to non-corrosive service

• Corrosive fluids such as – crude oil, Sea Water, H2S, Ammonia, Acids etc. required high corrosion resistance material.
• On the other hand, normal carbon steel is enough for Non-Corrosive fluids such as – Lube oil, Air, Nitrogen etc.

2nd Process condition that will impact the selection of material is the Temperature of fluids

• Cryogenic
• Low temperature
• Medium temperature
• High temperature

Increase or decrease in the service fluid temperature will greatly affect mechanical properties of the pipe material such as impact resistance, elongation, and tensile strength; hence, you required special material for both high temperature & Cryogenic services.

3rd Process condition that will impact the selection of material is the Pressure of service fluids. You required high strength material or higher thickness material for high-pressure services compare to normal pressure services.

Others non-process factor that also considered during material selection are

• Cost of material
• Availability – whether the material is locally available or import is required.
• Weldability and Manufacturability of material also play a vital role in selection. Preference is always given to the material which does not require any special requirement during welding and manufacturing.

Material Properties

Similar to process fluid properties, there are certain material properties that also consider while selecting pipe material. Some of them are

• Ultimate Tensile Strength – that is the capacity of a material to withstand when subjected to tension.
• Yield Strength – that is the load at which plastic deformation or you can say permanent deformation start.
• Elasticity – is the ability of a material to resume its normal shape after the load is removed just like rubber.
• % Elongation – Percent elongation is a measure of ductility.
• Hardness – is ability of a material to resist plastic deformation.
• Toughness – ability of a material to absorb energy before fracture.
• Creep resistance – ability to resist any kind of distortion when under a load over an extended period.
• Fatigue Resistance – is ability of material to withstand cyclic load for a given number of cycles before it fails.

Now considering both process and material property you can choose piping material from a verity of material available. In this chart, I have listed different types of material that used in process piping to meet various design condition. Piping material broadly classified into three categories. Metal, Nonmetal, and composite, which is a combination of metal to metal or metal to non-metal.

Ferrous Metal

1. Carbon Steel
2. Alloy Steel
3. Stainless Steel

Non-Ferrous Metal

1. Copper and Copper Alloys
2. Nickel and Nickel Alloys
3. Aluminum and Aluminum Alloys
4. Titanium and Titanium Alloys
5. Zirconium and Zirconium Alloys

Non-Metal

1. PVC/CPVC
2. HDPE
3. GRE/GRP
4. Cement pipes

Lined & Clad Pipe

Most commonly used ASTM Material grades.

• A53/A53M-02. Standard specification for pipe—steel, black and hotdipped, zinc-coated, welded, and seamless.
• A105/A105M-02. Standard specification for carbon steel forgings for piping applications.
• A106-02a. Standard specification for seamless carbon steel pipe for high-temperature service.
• A134-96(2001). Standard specification for pipe—steel, electric-fusion (arc)- welded (sizes NPS 16 and over).
• A135-01. Standard specification for electric-resistance-welded steel pipe.
• A139-00. Standard specification for electric-fusion (arc)-welded steel pipe (NPS 4 and over).
• A179/A179M-90a(2001). Standard specification for seamless cold-drawn low-carbon steel heat-exchanger and condenser tubes.
• A181/A181M-01. Standard specification for carbon steel forgings, for general-purpose piping.
• A182/A182M-02. Standard specification for forged or rolled alloy-steel pipe flanges, forged fittings, and valves and parts for high-temperature service.
• A193/A193M-03. Standard specification for alloy-steel and stainless steel bolting materials for high-temperature service.
• A194/A194M-03b. Standard specification for carbon and alloy steel nuts for bolts for high-pressure or high-temperature service or both.
• A210/A210M-02. Standard specification for seamless medium-carbon steel boiler and superheater tubes.
• A234/A234M-03. Standard specification for piping fittings of wrought carbon steel and alloy steel for moderate- and high-temperature service.
• A268/A268M-03. Standard specification for seamless and welded ferritic and martensitic stainless steel tubing for general service.
• A269-02a. Standard specification for seamless and welded austenitic stainless steel tubing for general service.
• A312/A312M-03. Standard specification for seamless and welded austenitic stainless steel pipes.
• A320/A320M-03. Standard specification for alloy-steel bolting materials for low-temperature service.
• A333/A333M-99. Standard specification for seamless and welded steel pipe for low-temperature service.
• A334/A334M-99. Standard specification for seamless and welded carbon and alloy-steel tubes for low-temperature service.
• A335/A335M-03. Standard specification for seamless ferritic alloy-steel pipe for high-temperature service.
• A350/A350M-02b. Standard specification for carbon and low-alloy steel forgings, requiring notch toughness testing for piping components.
• A358/A358M-01. Standard specification for electric-fusion-welded austenitic chromium-nickel alloy steel pipe for high-temperature service.
• A369/A369M-02. Standard specification for carbon and ferritic alloy steel forged and bored pipe for high-temperature service.
• A376/A376M-02a. Standard specification for seamless austenitic steel pipe for high-temperature central-station service.
• A381-96(2001). Standard specification for metal-arc-welded steel pipe for use with high-pressure transmission systems.
• A403/A403M-03a. Standard specification for wrought austenitic stainless steel piping fittings.
• A409/A409M-01. Standard specification for welded large-diameter austenitic steel pipe for corrosive or high-temperature service.
• A420/A420M-02. Standard specification for piping fittings of wrought carbon steel and alloy steel for low-temperature service.
• A437/A437M-01a. Standard specification for alloy-steel turbine-type bolting material specially heat treated for high-temperature service.
• A453/A453M-02. Standard specification for high-temperature bolting materials, with expansion coefficients comparable to austenitic stainless steels.
• A524-96(2001). Standard specification for seamless carbon steel pipe for atmospheric and lower temperatures.
• A530/A530M-03. Standard specification for general requirements for specialized carbon and alloy steel pipe.
• A587-96(2001). Standard specification for electric-resistance-welded lowcarbon steel pipe for the chemical industry.
• A671-96(2001). Standard specification for electric-fusion-welded steel pipe for atmospheric and lower temperatures.
• A672-96(2001). Standard specification for electric-fusion-welded steel pipe for high-pressure service at moderate temperatures.
• A691-98(2002). Standard specification for carbon and alloy steel pipe, electric-fusion-welded for high-pressure service at high temperatures.
• A789/A789M-02a. Standard specification for seamless and welded ferritic/austenitic stainless steel tubing for general service.
• A790/A790M-03. Standard specification for seamless and welded ferritic/austenitic stainless steel pipe.
• A815/A815M-01a. Standard specification for wrought ferritic, ferritic/austenitic, and martensitic stainless steel piping fittings.