Nominal Pipe Size (NPS) is employed to designate pipe diameter and thickness. The pipe schedule chart is specified with two non-dimensional numbers: a nominal pipe size (NPS) for inside diameter supported inches and a schedule (Sched. or Sch.) for wall thickness.

The following chart gives a pipe schedule chart or pipe schedule chart with weight as given relies on ANSI/ASME B36.10M and API 5L. Data are given relies on the NPS Tables given by ANSI B36.10M and includes Pipe wall thickness, outside diameter, nominal diameter.

ANSI- American National Standards Institute
ASME-American Society of Mechanical Engineers
API = American Petroleum Institute
NPS = Nominal Pipe Size
O.D.=.Outside Diameter
E.H. = Extra Heavy
Dbl.= Double
Std.= Standard

Pipe size is specified by two designations: a nominal pipe size (NPS) for diameter supported inches and a schedule (Sched. or Sch.) for wall thickness. NPS is usually incorrectly called National Pipe Size, thanks to confusion with the national pipe thread (NPT).

The European (ISO) designation such as NPS is DN (diametre nominal/nominal diameter/Durchmesser nach Norm), in which sizes are measured in millimeters. The term NB (nominal bore) is also commonly used interchangeably with NPS.

#### What does SCH mean for the steel pipe dimensions？

As describing the steel pipe parameter, we usually use the pipe schedule, It is a way that represents pipe wall thickness with a number. Pipe schedule ( sch. ) is not a wall thickness, but a wall thickness series. A different pipe schedule is for different wall thickness of the steel pipe in the same diameter. The most common used of schedule are SCH 5, 5S, 10, 10S, 20, 20S, 30, 40, 40S, 60, 80, 80S, 100, 120, 140, 160. The larger the table number, the thicker the pipe wall, and the higher the pressure resistance.

#### How To Use A Pipe Schedule Chart?

The pipe schedule chart below is a great method to check the relationship between pipe size, schedules, and wall thicknesses. If you’re checking what schedule a pipe is, or what the nominal pipe size is, we recommend:

1. Measure the outside diameter and the wall thickness of the pipe
2. Check the pipe schedule chart and find the outside diameter
3. Check the wall thickness in the corresponding column
4. This will reveal the nominal pipe size and the schedule

For example, if you measure a pipe that has an outside diameter of 3.500 and a wall thickness of 0.300, using the pipe schedule chart you can find that the pipe is a 3″ schedule 80 pipes.

#### How To Calculate The Weight of Carbon Steel Pipe?

The weight of carbon steel pipe per meter W=0.02466*S(D-S). Symbol meaning: D=outer diameter, S=wall thickness.

For example, a carbon steel pipe with an outer diameter of 60mm and a wall thickness of 4mm, find the weight per meter.

Solution: Weight per m=0.02466*4*(60-4)=5.52Kg.

The calculation formula of theoretical weight is W=0.0246615(D-S)*SW.

#### Extended Information Of How To Calculate The Weight Of Other Steel Pipe or Tube

1. The formula for calculating the weight of square and rectangular (rectangular) cross-sections:

The unit of weight per meter: kg/m (kilogram/meter) & lb/ft (lb/ft).

Calculation formula: kg/m = (OC-4WT) * WT * 0.00785

Among them: OC is the outer circumference, WT is the wall thickness; square OC=4*a, rectangle OC=2a+2b a,b is the side length.

2. Weight calculation formula for circular section carbon steel pipe:

Calculation formula: kg/m = (OD-WT) * WT * 0.0246615.

Among them: OD is the outer diameter and WT is the wall thickness.

SPI is located in China, recognized as a professional steel pipe supplier, OCTG distributor, and manufacturer in providing integrated steel pipe and tube solutions for oil and gas companies. Since 1998, SPI is a rapidly growing mid-size company with the best-quality steel products, dedicated employees, fast delivery, optional payment terms, and superior customer service. Moreover, we are facing numerous customers in the global market with the help of seven overseas production and sales station. Any inquiry, pls contact Ms. Jamie: +86 18569406543 to get assistance.