Description
STAINLESS STEEL PIPE FITTINGS BRIEF INTRODUCTION
Stainless Steel Pipe Fittings is Corrosion-resistant components (elbows, tees, reducers,caps,cross, stub ends) made from austenitic/duplex stainless steel, complying with ASTM A403, ASME B16.9/B16.11, used to connect, redirect, or terminate fluid flow in high-pressure/temperature systems.
STAINLESS STEEL PIPE FITTINGS is a kind of pipe fittings, stainless steel material is it made so called stainless steel pipe fittings, it includes: stainless steel elbow, stainless steel tee, cross stainless steel, stainless steel reducer, stainless steel pipe cap, etc.,
according to join method can be divided into the socket type stainless steel pipe fittings, flanges threaded stainless steel pipe fittings, stainless steel pipes and welded stainless steel pipe fittings four classes. The stainless steel elbow is used for the turning of the pipe;
Flanges are used for connecting the pipes to the pipes, connecting the pipe ends and the stainless steel tee to the three pipes. The stainless steel four-way pipe is used for four pipes. The stainless steel reducer is used for connecting two pipes of different pipe diameters.
Major stainless steel materials: 304, 304L, 316 , 316L,316/316L,304/304l,321,316ti,317L,347H,310S,904L,duplex stainless steel UNS S31803/saf2205,uns s32304/sad2304,uns s32750/2507,uns32760.
ASTM A403 ASME/ANSI B16.9/16.11 Stainless Steel Pipe Fittings Butt Weld/Socket Weld Seamless/Welded Supplier and manufacturer in China, Contact us for more details and get HIGH PERFORMANCE stainless steel pipe fittings with affortble price.
NAME:STAINLESS STEEL PIPE FITTINGS METERIAL:STAINLESS STEEL,DUPLEX STAINLESS STEEL,SUPER STAINLESS STEEL.
TYPES:ELBOW,TEE,REDUCER,CROSS,CAP, STUB ENDS SIZE:OD12-2500MM WT 1-50MM
STAINLESS STEEL PIPE FITTINGS DIRECTORY
1. INTRODUCTION
2. CONNECTION CLASSIFICATION
-BUTT WELDED
-WELDED
– SOCKET WELDED
3. WELDING
4. SPECIFICATION TYPES
5. PHOTO
6. CONTACTS
7. FAQ & Summry
Ⅰ STAINLESS STEEL PIPE AND FITTINGS ASME/ANSI B16.9/16.11 ASTM A403
Stainless steel pipe fittings are the general term for all kinds of stainless steel pipe connecting workpieces, which can be divided into different categories according to shape, purpose and connection. It has the characteristics of easy installation, high performance and durability, and has extensive application in all kinds of piping construction and installation.
Stainless steel pipe fittings can be divided into stainless steel, stainless steel flange, stainless steel head, stainless steel elbow, stainless steel cap and stainless steel.
Iron and steel differ in terms of carbon content. Iron, which has a carbon content of less than 2%, is steel, and more than 2% of carbon is called iron. Steel is widely used because it is flexible, flexible and flexible. All the things in life are steel, but people call it different. For stainless steel, whether magnet attracts or not, it is stainless steel as long as it meets its quality standard.
ASTM A403/ ANSI B16.9 Stainless Steel Pipe Fittings Suppliers and Manufacturers in china,Stainless Steel Butt Weld Pipe Fittings and Stainless Steel Socket Weld Pipe Fittings supplier with manufacturers’price
Ⅱ STAINLESS STEEL PIPE FITTINGS CONNECTION TYPE
1. Butt weld:
Stainless Steel butt weld pipe fittings are components designed to connect, redirect, or terminate fluid flow in piping systems by aligning and welding the pipe ends directly to the fitting’s edges, ensuring a seamless, leak-proof joint. Made from corrosion-resistant alloys (e.g., 304, 316, or duplex grades), they withstand high-pressure, high-temperature, and corrosive industrial applications, complying with ASTM/ASME standards for structural integrity and performance in sectors like chemical processing and power generation.
How to Butt Weld Stainless Steel Pipe Fittings:
Preparation: Clean the pipe and fitting edges to remove contaminants (oil, oxides) and bevel the edges (typically 30–37.5°) to ensure proper weld penetration.
Alignment: Secure the components with clamps, maintaining a consistent root gap (1.5–3 mm) and minimizing misalignment to avoid stress concentrations.
Welding Technique:
Use TIG (GTAW) or MIG (GMAW) methods for precision, employing argon-based shielding gas to prevent oxidation.
Apply a root pass to fuse the joint, followed by filler passes, ensuring controlled heat input to avoid carbide precipitation or distortion.
Post-Weld Treatment: Grind the weld bead smoothly, perform stress-relief annealing if required, and conduct non-destructive testing (e.g., X-ray, dye penetrant) to verify joint integrity.
This process ensures corrosion resistance, mechanical strength, and compliance with AWS D1.1/ASTM standards for critical applications.
Stainless Steel welded pipe fittings are components used to join, branch, or redirect stainless steel pipes in piping systems through fusion welding processes. These fittings, made from corrosion-resistant alloys (e.g., 304, 316), ensure durable, leak-proof connections in high-pressure and high-temperature industrial applications such as chemical processing and water treatment, complying with ASTM/ASME standards for material and dimensional specifications.
How to Weld Stainless Steel Pipe Fittings:
Preparation:
Clean the pipe and fitting surfaces thoroughly to remove oils, oxides, and contaminants using solvents or mechanical brushing.
Bevel the edges (typically 30–37.5°) to facilitate proper weld penetration.
Alignment and Clamping:
Align the pipe and fitting precisely to minimize gaps or misalignment, securing them with clamps or tack welds.
Welding Process:
Use TIG (GTAW) or MIG (GMAW) welding methods with argon-based shielding gas to prevent oxidation.
Apply a root pass to fuse the joint, followed by filler passes, maintaining controlled heat input to avoid carbide precipitation or warping.
Post-Weld Treatment:
Grind the weld bead to ensure a smooth surface and eliminate stress points.
Perform non-destructive testing (e.g., visual inspection, dye penetrant) to verify joint integrity.
This method ensures corrosion resistance, mechanical strength, and compliance with industrial standards for critical piping systems.
Stainless Steel socket weld pipe fittings are components designed to connect small-diameter pipes by inserting the pipe end into a recessed socket within the fitting, followed by circumferential welding around the joint. Made from corrosion-resistant stainless steel alloys (e.g., 304, 316), they provide robust, leak-proof connections for high-pressure and high-temperature applications in industries like petrochemicals and power generation, complying with ASME B16.11 standards for dimensional and material integrity.
How to Perform Socket Welding:
Preparation:
Clean the pipe end and fitting socket thoroughly to remove debris, oils, or oxides using solvents or wire brushes.
Ensure the pipe is inserted into the socket until it seats firmly, leaving a 1.5–3 mm root gap between the pipe end and socket shoulder to accommodate thermal expansion during welding.
Alignment and Tack Welding:
Securely align the pipe and fitting to prevent misalignment, then apply small tack welds at 2–3 points to hold the assembly in place.
Welding Process:
Use TIG (GTAW) or MIG (GMAW) welding with argon-based shielding gas to avoid oxidation46.
Weld circumferentially around the joint, starting with a root pass to fuse the pipe and socket, followed by filler passes to build weld strength. Control heat input to prevent distortion or carbide precipitation in stainless steel.
Post-Weld Treatment:
Remove slag and smooth the weld bead using grinding tools for a clean finish.
Conduct non-destructive testing (e.g., visual inspection, dye penetrant) to ensure weld integrity and absence of cracks or voids.
Socket welding ensures compact, high-strength joints ideal for tight spaces and critical systems, adhering to ASME B31.3 and ASTM A403 specifications.
Ⅲ ANSI B16.9 STAINLESS STEEL PIPE FITTINGS WELDING
Stainless steel pipe fittings is a Stainless steel tube inserted into the fitting socket part then along a circle on the edge of a tube made of argon arc welding pipe, is the most reliable connection of all connections. Pipe socket diameter = pipe outside diameter. The welding parts can be divided into two parts: edge extension, edge extension and no extension, and the welding standard is usually dn15-dn100.
Butt welded
The butt welded stainless steel pipe fittings is the pipe piece that makes the stainless steel pipe and the pipe parts in the seam of the seam, which is usually required for welding.
Outer diameter of pipe socket = pipe outside diameter.
Butt welding is commonly used in the stainless steel piping system welding.
Viega profi-press pipe fittings
It has the characteristics of reliable safety, convenient construction, suitable for embedded installation, maintenance and maintenance and relative superiority.
Viega profi-press pipe works will be thin-walled stainless steel tube inserted into the viega profi-press pipe socket, using special conformity of tools within stainless steel pipe fittings, stainless steel pipe clamp to death the conformity of cross section shape is hexagonal, combined with the stainless steel pipe and pipe fittings with o-rings seal between, make its have check leakage, drawing resistance, resistance to vibration and high pressure resistance and other properties.
Thus it is direct drinking water system, water system, heating system, steam system, industrial tubing system and industrial air system of a kind of relatively advanced fittings. Applicable for water, oil, gas and other pipe connections. Manufacturing standards: GB,ASTM,AISI,JIS,DIN,EN,GOST .
Nominal pressure: less than 1.6 MPa
Applicable temperature: – 20 ℃ ~ 110 ℃
Applicable media: oil, water, gas and other non-corrosive or corrosive medium
Manufacturing materials: stainless steel 304, 316L
Piping: 15.88 ~ Φ Φ 108 stainless steel welded steel pipe
Quick to take over a
Insert self-locking card spring pipe fittings
Fast flash connection is a kind of “insert self-locking card spring connection” technology, as long as pipe material
A stainless steel pipe is inserted
Insert a takeover of can achieve rapid flash after the installation of the effect, and when the disassembly, by the special tool of form a complete set of portable clamp fast over a strength can remove the pipe out.
Rapid flash over not only more convenient to install and remove, fast, and has a reusable, no leakage, shockproof, buffer cold heat, such as excellent performance, is a new exploration on the pipe connection way and breakthrough. It has been widely used and verified in the water supply system at home and abroad, which is designated by the water department in Hong Kong.
Through special high temperature resistant rubber ring, the pipe fittings in solar water heater fluctuation water pipe has also started to slowly get application and recognition, makes it more convenient installation and use. Believe, pipeline connection technology, innovation and breakthroughs will appear more will continuously toward the development direction, such as convenient, quick, human nature, and there will be more and more perfect product supply human to enjoy
Ⅳ STAINLESS STEEL PIPE FITTINGS SPECIFICATION TYPES
Specifications Ф 12.0 mm ~ 2500.0 mm, with stainless steel Pipe, square pipe,Installation of stainless steel pipe fittings Heavy wall pipe, seamless tube, sewn pipe, industrial pipe, liquid pipe, surface has bright surface, fog surface can be customized according to customer’s request. Materials: duplex unss31803/saf2205,uns s32304/saf2304,uns s32750/sad2507,uns s32760,904l 310S, 347H,317L,316ti,316, 316L, 304, 304L, 321, 301, 202, 201, etc.
STAINLESS STEEL PIPE FITTINGS AVAILABLE STANDARD SIZES TO ARRANGE PRODUCTION:
| INCH | inch sizc (ID) | OD | STANDARD | ||||||||||||||
| SCH 5s | SCH 10S | SCH 10 | SCH 20 | SCH 30 | SCH 40 | SCH 60 | SCH 80 | SCH 100 | SCH 120 | SCH 140 | SCH 160 | STD | XS | XXS | |||
| 1/8 | DN6 | 10.3 | – | 1.24 | – | – | – | 1.73 | – | 2.42 | – | – | – | – | 1.73 | 2.41 | – |
| 1/4 | DN8 | 13.7 | – | 1.65 | – | – | – | 2.24 | – | 3.02 | – | – | – | – | 2.24 | 3.02 | – |
| 3/8 | DN10 | 17.1 | – | 1.65 | – | – | – | 2.31 | – | 3.2 | – | – | – | – | 2.31 | 3.2 | – |
| 1/2 | DN15 | 21.3 | 1.65 | 2.11 | – | – | – | 2.77 | – | 3.73 | – | – | – | 4.78 | 2.77 | 3.73 | 7.47 |
| 3/4 | DN20 | 26.7 | 1.65 | 2.11 | – | – | – | 2.87 | – | 3.91 | – | – | – | 5.56 | 2.87 | 3.91 | 7.82 |
| 1 | DN25 | 33.4 | 1.65 | 2.77 | – | – | – | 3.38 | – | 4.55 | – | – | – | 6.35 | 3.38 | 4.55 | 9.09 |
| 1.1/4 | DN32 | 42.2 | 1.65 | 2.77 | – | – | – | 3.56 | – | 4.85 | – | – | – | 6.35 | 3.58 | 4.85 | 9.7 |
| 1.1/2 | DN40 | 48.3 | 1.65 | 2.77 | – | – | – | 3.68 | – | 5.05 | – | – | – | 7.14 | 3.68 | 5.08 | 10.15 |
| 2 | DN50 | 60.3 | 1.65 | 2.77 | – | – | – | 3.91 | – | 5.54 | – | – | – | 8.74 | 3.91 | 5.54 | 11.07 |
| 2.1/2 | DN65 | 73 | 2.11 | 3.05 | – | – | – | 5.16 | – | 7.01 | – | – | – | 9.53 | 5.16 | 7.01 | 14.02 |
| 3 | DN80 | 88.9 | 2.11 | 3.05 | – | , – | – | 5.49 | – | 7.62 | – | – | – | 11.13 | 5.49 | 7.52 | 15.24 |
| 3.1/2 | DN90 | 101.6 | 2.11 | 3.05 | – | – | – | 5.74 | – | 8.08 | – | – | – | – | 5.74 | 8.08 | – |
| 4 | 114.3 | 2.11 | 3.05 | – | – | – | 6.02 | – | 8.58 | – | 11.13 | – | 13.49 | 6.02 | 8.56 | 17.12 | |
| 5 | DN125 | 141.3 | 2.77 | 3.4 | – | – | – | 6.55 | – | 9.53 | – | 12.7 | – | 15.88 | 6.55 | 9.53 | 18.05 |
| 6 | DN150 | 168.3 | 2.77 | 3.4 | – | – | – | 7.11 | – | 10.97 | – | 14.27 | – | 18.26 | 7.11 | 10.97 | 21.95 |
| 8 | DN200 | 219.1 | 2.77 | 3.76 | – | 6.35 | 7.04 | 8.18 | 10.31 | 12.7 | 15.09 | 18.26 | 20.62 | 23.01 | 8.18 | 12.7 | 22.23 |
| 10 | DN250 | 273.1 | 3.4 | 4.19 | – | 6.35 | 7.8 | 9.27 | 12.7 | 15.09 | 18.26 | 21.44 | 25.4 | 28.58 | 9.27 | 12.7 | 25.4 |
| 12 | DN300 | 323.9 | 3.96 | 4.57 | – | 6.35 | 8.38 | 10.31 | 14.27 | 17.48 | 21.44 | 25.4 | 28.58 | 33.32 | 9.35 | 12.7 | 25.4 |
| 14 | DN350 | 355.5 | 3.96 | 4.78 | 6.35 | 7.92 | 9.53 | 11.13 | 15.09 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 | 9.53 | 12.7 | – |
| 16 | DN400 | 406.4 | 4.19 | 4.78 | 6.35 | 7.92 | 9.53 | 12.7 | 16.66 | 21.44 | 26.19 | 30.96 | 36.53 | 40.49 | 9.53 | 12.7 | – |
| 18 | DN450 | 457 | 4.19 | 4.78 | 6.35 | 7.92 | 11.13 | 14.27 | 19.05 | 23.83 | 29.36 | 34.93 | 39.67 | 45.24 | 9.53 | 12.7 | – |
| 20 | DN500 | 508 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | 15.09 | 20.62 | 26.19 | 32.54 | 38.1 | 44.45 | , 50.01 | 9.53 | 12.7 | – |
| 22 | DN550 | 559 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | – | 22.23 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | 9.53 | 12.7 | – |
| 24 | DN600 | 610 | 5.54 | 6.35 | 6.35 | 9.53 | 14.27 | 17.48 | 24.61 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 | 9.53 | 12.7 | – |
| 26 | DN650 | 660 | – | – | 7.92 | 12.7 | – | – | – | – | – | – | – | – | 9.53 | 12.7 | – |
| 28 | DN700 | 711 | – | – | 7.92 | 12.7 | 15.88 | – | – | – | – | – | – | – | 9.53 | 12.7 | – |
| 30 | DN750 | 762 | 6.35 | 7.92 | 7.92 | 12.7 | 15.88 | – | – | – | – | – | – | – | 9.53 | 12.7 | – |
| 32 | DN800 | 813 | – | – | 7.92 | 12.7 | 15.88 | 17.48 | – | – | – | – | – | – | 9.53 | 12.7 | – |
| 34 | DN850 | 864 | – | – | 7.92 | 12.7 | 15.88 | 17.48 | – | – | – | – | – | – | 9.53 | 12.7 | – |
| 36 | DN900 | 914 | – | – | 7.92 | 12.7 | 15.88 | 19.05 | – | – | – | – | – | – | 9.53 | 12.7 | – |
| 38 | DN950 | 965 | – | – | – | – | – | – | – | – | – | – | – | – | 9.53 | 12.7 | – |
| 40 | DN1000 | 1015 | – | – | – | – | – | – | – | – | – | – | – | – | 9.53 | 12.7 | – |
| 42 | DN1050 | 1067 | – | – | – | – | – | – | – | – | – | – | – | – | 9.53 | 12.7 | – |
| 44 | DN1100 | 1118 | – | – | – | – | – | – | – | – | – | – | – | – | 9.53 | 12.7 | – |
| 46 | DN1150 | 1188 | – | – | – | – | – | – | – | – | – | – | – | – | 9.53 | 12.7 | – |
| 48 | DN1200 | 1219 | – | – | – | – | – | – | – | – | – | – | – | – | |||
Ⅴ STAINLESS STEEL PIPE FITTINGS PHOTO:
ANSI B16.9 STAINLESS STEEL BUTT WELD FITTINGS-BW TYPE
stainless steel pipe fittings butt weld type suppliers,manufacturers ,stockholder, contact us for good price and high quality stainless steel pipe fittings
ASME B16.11 STAINLESS STEEL SOCKET WELD FITTINGS-BW TYPE
STAINLESS STEEL PIPE FITTINGS SOCKET WELD TYPE MANUFACTURER AND SUPPLIER IN CHINA WITH HIGH QUALITY AND GOOD PRICE FOR INDUSTRAIL APPLICATIONS
Ⅵ STAINLESS STEEL PIPE FITTINGS ENQUIRY CONTACTS
COMPANY:KCM SPECIAL STEEL CO.,LTD
SALES MAN:MR.BOB LEE
EMAIL:KCMSPECIALSTEEL@OUTLOOK.COM
WEB:WWW.DUPLEXSTAINLESSSTEELPIPES.COM
MOB&WHATSAPP:+86-13758498349
FAQs and Summary About Welded/Seamless Stainless Steel Pipe Fittings
1. What are Stainless Steel Pipe Fittings?
Answer: Stainless steel pipe fittings are components used to connect, redirect, or terminate fluid flow in piping systems. Made primarily from corrosion-resistant stainless steel alloys, these fittings are durable and capable of withstanding high-pressure, high-temperature, and corrosive environments. They are widely used in industries such as chemical processing, power generation, water treatment, and petrochemicals.
2. What Types of Stainless Steel Pipe Fittings are Available?
Answer: Stainless steel pipe fittings come in various types, each serving a specific purpose:
- Elbows: Used for turning the pipe.
- Tees: Connect three pipes.
- Reducers: Connect two pipes of different diameters.
- Crosses: Connect four pipes.
- Caps: Terminate the end of a pipe.
- Stub ends
3. What are Stainless Steel Butt Weld Fittings and How are They Used?
Answer: Stainless steel butt weld fittings are designed to connect pipes by aligning and welding the pipe ends directly to the fitting’s edges. This ensures a seamless, leak-proof joint. They comply with ASTM/ASME standards for structural integrity and performance. The welding process typically involves:
- Preparation: Cleaning the pipe and fitting edges to remove contaminants.
- Alignment: Securing the components with clamps to maintain a consistent root gap.
- Welding: Using TIG (GTAW) or MIG (GMAW) methods with argon-based shielding gas.
- Post-Weld Treatment: Grinding the weld bead and performing non-destructive testing to verify joint integrity.
4. What are Stainless Steel Socket Weld Fittings and How Do They Differ from Butt Weld Fittings?
Answer: Stainless steel socket weld fittings connect small-diameter pipes by inserting the pipe end into a recessed socket within the fitting. Circumferential welding around the joint provides a robust, leak-proof connection. Unlike butt weld fittings, socket weld fittings are designed for compact connections, ideal for tight spaces. The welding process is similar to butt weld fittings but focuses on the socket design.
5. What are Seamless Stainless Steel Pipe Fittings and Their Advantages?
Answer: Seamless stainless steel pipe fittings are made from seamless stainless steel tubes, which have no welds or seams. This results in higher strength and better corrosion resistance compared to welded fittings. Seamless fittings are often used in critical applications where high pressure, high temperature, or corrosive environments are present.
6. What Standards Do Stainless Steel Pipe Fittings Comply With?
Answer: Stainless steel pipe fittings comply with various standards, depending on the application and industry. Common standards include:
- ASTM A403: Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
- ANSI B16.9: Factory-Made Wrought Butt-Welding Fittings
- ASME B16.11: Forged Steel Fittings, Socket-Welding and Threaded
These standards ensure that the fittings meet specific material, dimensional, and performance requirements.
Summary
Stainless steel pipe fittings are essential components in various piping systems, offering reliable connections and durability in high-pressure, high-temperature, and corrosive environments. Made from corrosion-resistant alloys such as 304, 316, 300 series, nickel alloy and duplex/super duplex grades, these fittings come in various types including elbows, tees, reducers, crosses, caps, and stub ends.
Stainless steel butt weld fittings and socket weld fittings are two primary types. Butt weld fittings connect pipes by aligning and welding the pipe ends directly to the fitting’s edges, ensuring a seamless, leak-proof joint. Socket weld fittings connect small-diameter pipes by inserting the pipe end into a recessed socket within the fitting, followed by circumferential welding. Both types comply with ASTM/ASME standards for structural integrity and performance.
Seamless stainless steel pipe fittings offer higher strength and better corrosion resistance compared to welded fittings, making them suitable for critical applications. These fittings comply with standards such as ASTM A403 and ANSI B16.9, ensuring they meet specific material, dimensional, and performance requirements.
When choosing stainless steel pipe fittings, it is essential to consider factors such as application, material, type, and standard compliance. Reputable suppliers like KCM Special Steel Co., Ltd., offer a wide range of high-quality stainless steel pipe fittings at competitive prices. They provide detailed information about their products and services, ensuring customers can make informed decisions based on their specific needs.
In conclusion, stainless steel pipe fittings play a vital role in ensuring the reliability and durability of piping systems across various industries. By selecting the right fittings, companies can ensure compliance with industry standards and optimize the performance of their piping systems.
