
18+
years
We have been working in the industry since 2008
200+
Excellent Team
We have an excellent professional pre-sales and after-sales team of more than 200 people to serve you throughout the process.
35000㎡
Square Meters Built
We have warehouses and factories covering an area of 35,000 square meters
Definition of Gnee stainless steel pipe Buttweld fittings

Definition of Gnee stainless steel pipe fittings
Stainless steel pipe 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 elbows, stainless steel tees, stainless steel crosses, stainless steel reducers, stainless steel pipe caps, etc. According to the connection method, they can be divided into four categories: socket-type 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 for the turning of pipe fittings; flanges are used to connect pipes to each other, connected to the pipe ends, stainless steel tees are used for the places where three pipes converge; stainless steel crosses are used for the places where four pipes converge; stainless steel reducers are used for the places where two pipes of different diameters are connected. Main stainless steel materials: 304, 304L, 316|, 316L
Gnee stainless steel pipe fittings Overview
Stainless steel pipe fittings are a general term for various stainless steel pipe connection workpieces, which can be divided into different categories according to shape, purpose, connection method, etc. It has the characteristics of easy installation, high performance, durability, etc., and is widely used in various pipeline construction and installation.
Stainless steel pipe fittings can be divided into stainless steel tees, stainless steel flanges, stainless steel reducers, stainless steel elbows, stainless steel pipe caps, stainless steel caps, etc.
Iron and steel are distinguished by the amount of carbon they contain. Iron-carbon alloys with a carbon content of less than 2% are called steel, and those with a carbon content of more than 2% are called iron. Steel is widely used because it is tough, elastic, and rigid. Everything we encounter in our daily lives is steel, but people call it by different names. For stainless steel, whether it can be attracted by a magnet or not, as long as it meets its quality standards, it is stainless steel.

standard of Gnee stainless steel pipe fittings
| Stainless Steel Pipe Fittings Standard | Description |
|---|---|
| ASTM A182/A182M | Forged or rolled alloy steel pipe flanges, forged fittings and valves and parts for high temperature service. Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings |
| ASTM A403/A403M | Wrought austenitic stainless steel 316Ti piping fittings. |
| ASTM A815/A815M | Wrought ferritic, ferritic/austenitic and martensitic stainless steel 316Ti piping fittings. |
| AS 2129 | This Standard specifies requirements for circular flanges of nominal sizes DN 15 to DN 3000. Flanges for pipes, valves and fittings |
| ANSI/ASME B1.20.1 | Pipe threads, general purpose (inch). |
| ANSI B16.5 | Steel pipe flanges and flanged fittings. |
| ANSI B16.9 | Factory-made wrought steel butt-welding fittings. |
| ANSI B16.11 | Forged steel fittings socket-welding and threaded. Socket Welding and Threaded Forged Fittings |
| ANSI B16.25 | Butt-welding ends. |
| MSS SP43 | Wrought stainless steel butt-welding fittings. Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications |
| BS21 | Threading. |
| ISO 4144 | Stainless steel fittings threaded to ISO 7-1. |
| MSS SP-95 | Swage(d) Nipples and Bull Plugs |
| BS3799 | Specification for Steel pipe fittings, screwed and Socket-welding for the petroleum industry |
| ANSI – B 16.9 ASTM A403 – ASME SA403 |
‘Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings’ |
| API 590-605 ASME B16.9 |
‘Factory-Made Wrought Buttwelding Fittings’ |
| ASME B16.25 | ‘Buttwelding Ends’ |
| ASME B16.28 | ‘Wrought Steel Buttwelding Short Radius Elbows and Returns’ |
Types of Gnee stainless steel pipe fittings
Pipe flange
Keywords: Welding Neck Flange,Blind Flange,Socket Weld Flange.Lapped Joint Flange,Slip-on Flange,Plate Flange
Size: NPS from 1/2'' to 24'', CLASS from 150 to 2500
Standard: ANSI/ASME B 16.5, DIN, JIS, AWWA, API, ISO etc
Material: Stainless Steel --- ASTM A403 F304/304L, 316/316L,316Ti,321,317L,310S
Ends: Square Ends/Plain Ends (Straight Cut, Saw Cut, Torch Cut), Beveled/Threaded Ends
Delivery : Within 30 Days and Depends on Your Order Quantity
Packing: Packed in Wood Cabins/Wood Tray
Usage: For Conveying Gas, Water and Oil Either in the Oil or Natural Gas Industriei
Pipe Tee
Keywords: Equal Tee, Unequal Tee, Cross Tee, Socket Tee, Short Tee, Forging Tee
Size: NPS from 1/2'' to 36'', DN from 15 to 900, WT: 2-80mm, SCH 40/80/XXS
Material & Standard:Stainless Steel --- ASTM 403 304/304L,316/316L,316Ti,321,317L,310S;
Ends : Square Ends/Plain Ends (straight cut, saw cut, torch cut), Beveled/Threaded Ends
Packing: Packed in Wood Cabins/ Wood Tray
Usage: Oil And Gas Transmissions;Petroleum And Oil Refining;Water Treatment Systems;Chemical Industries; Sanitary Tubing;Power Stations;Machines And Equipment;Heat Exchange
Pipe Elbow
Keywords: 45 Degree/90 Degree/180 Degree Elbow, Long Radius/Short Radius Elbow
Size: NPS: 1/2''~24''(Seamless), 24''~72''(Welded) ;DN: 15~1200, WT: 2~80mm, SCH 5~XXS
Bending Radius: R=1D~10D, R=15D, R=20D
Material & Standard:Stainless Steel --- ASTM A403 304/304L/310/310S/316/316L/317L/321
Delivery : Within 30 days and Depends on your order quantity
Packing: Packed in Wood Cabins/Wood Tray
Usage: For Conveying Gas, Water and Oil Either in the Oil or Natural Gas Industries
Pipe Cap
Keywords: Pipe End Cap, Pipe Steel Cap, Standard Steel Pipe Cap, Strong Steel Pipe Cap
Size: NPS from 1/2'' to 48'', DN from 12 to 1200,WT: 2-80mm, SCH 40/80/XXS
Material: Stainless Steel --- ASTM 403 304/304L, 316/316L,316Ti,321,317L,310S;
Delivery: BKS, NBK,BK ,BKW, GBK(+A), NBK(+N), BK(+C)
Packing: Packed in Wood Cabins/ Wood Tray
Application: Petroleum, Electricity, Chemicals, Natural Gas, Construction, Shipbuilding And Other Fields Because Of Its High Pressure, High Temperature, Etc .
Application of Gnee stainless steel pipe fittings
Stainless steel pipe fittings are used to connect different sections of pipes or tubes, allowing for the flow of fluids or gases. There are many different types of stainless steel pipe fittings available, each with its own unique uses and applications. Here are some of the most common types of stainless steel pipe fittings and their uses:
Elbow fittings: These fittings are used to change the direction of the pipe. They are available in 90-degree, 45-degree, and 180-degree angles.
Tee fittings: These fittings are used to connect three pipes together, creating a T shape. They are commonly used in pipelines for liquid and gas transport.
Reducer fittings: These fittings are used to connect pipes of different sizes, allowing for the flow of fluids from larger pipes to smaller ones, or vice versa.
Coupling fittings: These fittings are used to connect two pipes together, providing a secure and leak-proof connection.
Cross fittings: These fittings are used to connect four pipes together, creating a cross shape. They are commonly used in pipelines for liquid and gas transport.
Union fittings: These fittings are used to provide easy access to pipes for maintenance or repair. They consist of two parts that can be easily disconnected for access.
Nipple fittings: These fittings are used to connect two pipes together, typically in situations where the pipes are close together.
Flange fittings: These fittings are used to connect pipes or valves to other equipment, such as pumps or tanks. They are commonly used in industrial settings.
Cap fittings: These fittings are used to close off the end of a pipe, providing a secure and leak-proof seal.
Bend fittings: These fittings are used to create bends in pipes, allowing them to follow a specific path or route.
Each type of stainless steel pipe fitting has its own unique uses and applications. By selecting the right fitting for your needs, you can ensure a secure and reliable connection for your pipes or tubes.
Pipe Fittings Use

Usage
Fittings are components that are used to connect, join, or adapt different parts of a system, such as pipes, tubes, or hoses. They serve multiple purposes, including:
Connection: Fittings are used to connect sections of pipes, tubes, or hoses, ensuring a secure and leak-free joint.
Directional Changes: They allow for changes in the direction of fluid or gas flow within a system, such as elbows or bends.
Size Adaptation: Fittings can adapt pipes or tubes of different sizes, ensuring compatibility.
Branching: They enable branching or splitting of fluid or gas flow into multiple directions, like tees or crosses.
Valve and Control: Some fittings incorporate valves or controls to regulate or stop the flow as needed.
Pressure Control: Fittings may include pressure-relief valves or regulators to control fluid or gas pressure.
System Maintenance: Fittings with inspection ports or couplings facilitate system maintenance and testing.
Connection to Equipment: Fittings allow pipes or hoses to connect to various equipment or appliances.
Our Factory
GNEE has 14 steel production lines, 10 processing equipment for processing, bending, painting, heat treatment, cutting, drilling, beveling, tempering, and surface treatment. It has complete testing equipment and strong technical force. The annual production capacity is more than 60,000 tons. The company has passed ISO9001 international quality management system certification and obtained 8 quality system certifications including provincial enterprise credit certificate, enterprise credit certificate, quality service certificate, and integrity management demonstration uni


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Gnee Steel (Tianjin) Co., Ltd. is well-known as one of the leading stainless steel pipe fitting manufacturers and suppliers in China. Our factory offers customized stainless steel pipe fitting made in China with competitive price. Welcome to contact us for wholesale service.
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