SCH 80 stainless steel fittings

What are stainless steel fittings?

Stainless steel fittings are a type of pipe fittings. They are made of stainless steel, so they are called stainless steel pipe fittings. They include: stainless steel pipe elbows, stainless steel tees, stainless steel crosses, stainless steel pipe reducers, stainless steel pipe caps, etc., depending on the connection method. It is divided into four categories: socket stainless steel pipe fittings, threaded stainless steel pipe fittings, flange stainless steel pipe fittings and welded stainless steel pipe fittings. Stainless steel elbows are used where pipe fittings turn; flanges are used to connect pipes to each other and are connected to the pipe ends; stainless steel tees are used where three pipes come together; stainless steel four-way pipes are used where four pipes come together. Place; stainless steel reducer is used where two pipes of different diameters are connected. Main stainless steel materials: 304, 304L, 316, 316L

What is SCH 80?
SCH 80 (Schedule 80 pipe) represents the wall thickness, which refers to XS thickened pipes with a pressure wall thickness less than DN200mm. Usage scenarios generally involve high temperature, high pressure, and highly corrosive conditions. The wall thickness of SCH 80 grade pipes is relatively thick, and the pressure and temperature in the use environment must comply with ASME/ANSI standards to ensure the safety and reliability of the pipeline system. SCH 80 grade piping systems are often used in the manufacture of chemical equipment, high-pressure pipelines, high-temperature heaters and some special piping systems. When designing and installing a steel pipe system, it is necessary to select the appropriate pipe number according to the actual use environment to ensure the stability and safety of the pipeline system.

Manufacturing process of SCH 80 stainless steel fittings:

The manufacturing process of SCH 80 steel pipe fittings includes forging, casting, forging, cold bending, heat treatment and other methods. Different processes affect the material properties and service life of pipe fittings. In order to ensure the safe operation of the pipeline system, the production process of pipe fittings must comply with relevant standards and specifications.

Standard specification for SCH 80 stainless steel fittings:

The standard specification for SCH 80 stainless steel pipe fittings is an important guarantee for ensuring the safety and quality of pipeline system operations. Various standard-setting organizations at home and abroad have formulated corresponding standards, such as the international pipe fitting standard ASME B16.9, the domestic steel pipe fitting standard GB/T12459, etc. There are corresponding regulations on the specifications, dimensions, surface treatment, pipe wall thickness, etc. of pipe fittings.

The internationally accepted pipe flange standards can be summarized into two different and non-interchangeable pipe flange systems: one is the European pipe flange system represented by Germany; the other is the American pipe flange system represented by the United States. system.

Quality control of stainless steel fittings:

Quality control of stainless steel fittings is the key to ensuring the quality and safety of the pipeline system. The quality inspection of pipe fittings includes appearance quality inspection, chemical composition analysis, physical performance testing, non-destructive testing and other aspects. Only pipe fittings that have passed the inspection can be put into use to ensure the safe and effective operation of the pipeline system.

Advantages and disadvantages of stainless steel pipe fittings:

Advantages:

1. Durable
Due to its excellent corrosion resistance, stainless steel pipe fittings can withstand the erosion of highly corrosive media such as water vapor, ocean air, acids, alkalis, and salts, and have excellent durability. Compared with other metal pipes, stainless steel pipe fittings have an extremely long service life, which can save more maintenance and replacement costs.

2. Easy to clean
Stainless steel pipe fittings have a smooth appearance, are easy to clean, and are not easily contaminated with dust, impurities and other substances, keeping them clean and hygienic. Therefore, stainless steel pipe fittings are widely used in health-related places, such as food, pharmaceutical and other fields.

3. Environmental protection and health
Stainless steel pipe fitting is a non-toxic, odorless, non-radioactive and environmentally friendly material that will not cause any harm to the human body or the environment. Since it does not contain halogen elements, stainless steel pipes can also effectively prevent environmental pollution.

4. Widely applicable to various fields
The physical and chemical properties of stainless steel pipe fittings are very good, and the strength, hardness and other properties can be controlled according to actual needs. Therefore, stainless steel pipe fittings are widely used in various fields such as machinery manufacturing, construction, petrochemical industry, food processing, medicine, etc. Stainless steel pipe fittings can also be produced by cold drawing, welding, etc., and have good processing properties and plasticity, which greatly expands their application fields.

Disadvantages:
1. Higher cost
Compared with ordinary carbon steel pipe fittings, stainless steel pipe fittings are more expensive to manufacture and more expensive, so they are not suitable for general construction and industrial use. However, its use in special environments can achieve more long-term economic benefits.

2. Poor thermal conductivity
Stainless steel has poor thermal conductivity and dissipates heat relatively slowly compared to ordinary carbon steel, so special attention is required when using it at high temperatures.

3. Difficulty in processing
Stainless steel pipe fittings are difficult to process and require certain production equipment and professional skills. For manufacturers, higher production skills and processing costs are required.

SCH 40 pipe vs SCH 80 stainless steel fittings:

The main difference between SCH 40 and SCH 80 stainless steel fittings is the wall thickness. SCH 40 pipe has a thinner wall thickness and is often used in low-pressure applications such as residential plumbing or irrigation systems. SCH 80 stainless steel fitting has thicker walls and is used in high-pressure applications such as industrial processes, hydraulic systems and underground piping. They are designed to handle higher pressures and withstand greater stresses than SCH 40 pipe.

Looking at specific dimensions, the wall thickness of SCH 40 pipe is approximately 0.109 inches, while the wall thickness of SCH 80 pipe is approximately 0.154 inches. This means that SCH 80 pipe is approximately 30% thicker than SCH 40 pipe. While SCH 80 pipe is stronger and more durable than SCH 40 pipe, they are also more expensive.

SCH 80 pipe has thicker walls and requires more material and more manufacturing time, which increases costs. When selecting pipe for a specific application, it is important to consider the pressure requirements and the cost-effectiveness of selecting thicker, more expensive pipe.

Pipe Sch 80 Chart, Dimensions, Weight And Pipe Wall Thickness

Nominal size [inches]	Outside diameter [inches]	Outside diameter [mm]	Wall thickness [inches]	Wall thickness [mm]	Weight [lb/ft]	Weight [kg/m]
1/8	0.405	10.3	0.095	2.41	0.31	0.47
1/4	0.54	13.7	0.119	3.02	0.54	0.8
1/2	0.84	21.3	0.147	3.73	1.09	1.62
3/4	1.05	26.7	0.154	3.91	1.47	2.2
1	1.315	33.4	0.179	4.55	2.17	3.24
1 1/4	1.66	42.2	0.191	4.85	3	4.47
1 1/2	1.9	48.3	0.2	5.08	3.63	5.41
2	2.375	60.3	0.218	5.54	5.02	7.48
2 1/2	2.875	73	0.276	7.01	7.66	11.41
3	3.5	88.9	0.3	7.62	10.25	15.27
3 1/2	4	101.6	0.318	8.08	12.5	18.63
4	4.5	114.3	0.337	8.56	14.98	22.32
5	5.563	141.3	0.375	9.53	20.78	30.97
6	6.625	168.3	0.432	10.97	28.57	42.56
8	8.625	219.1	0.5	12.7	43.39	64.64
10	10.75	273	0.594	15.09	64.43	96.01
12	12.75	323.8	0.688	17.48	88.63	132.08
14	14	355.6	0.75	19.05	106.13	158.1
16	16	406.4	0.844	21.44	136.61	203.53
18	18	457	0.938	23.83	170.92	254.55
20	20	508	1.031	26.19	208.87	311.17
24	24	610	1.125	30.96	296.58	442.08

Go here to learn more: Stainless steel pipe fittings vs Carbon steel pipe fittings