Elbow(90/45), Cross, Tee, Coupling, Half Coupling, Boss, Cap,
Couplet, Street Elbow, Plug, Bushing
Dimensions and Standards
ASME B16.11
Thickness
Sch 5S to Sch XXS
Origin
China
Applications
Petro-Chemical Industry, Oil and Gas Industry, Nuclear Industry,
Pulp & Paper Industry, Research & Development, Mega Projects &
Defense & Development Industries
Coating
Zinc Plated, Oil Black Paint, Cold and Hot Dip Galvanized,
Anti-rust Paint, Yellow Transparent
Specifications
ASTM A105
ASTM A234 WPB, WPC
ASTM A420 WPL3 WPL6,
MSS-SP-75 WPHY 42/46/52/56/60/65/70
ASTM A234 Fitting Chemical Composition(%)
Si
S
Mn
P
C
Mo
Cr
Ni
Cu
WPB
≤0.1
0.058
0.29-1.06
0.05
≤0.3
≤0.15
0.4
0.4
0.4
WPC
≤0.1
0.058
0.29-1.06
0.05
≤0.35
≤0.15
0.4
0.4
0.4
ASTM A420 Fitting Chemical Composition(%)
C
Mn
P
S
Si
Ni
Cr
Mo
Cu
Cb
V
WPL3
0.2
0.31-0.64
0.05
0.05
0.13-0.37
3.2-3.8
WPL6
0.3
0.5-1.35
0.035
0.04
0.15-0.4
0.4
0.3
0.12
0.4
0.02
0.08
ASTM A105 Fitting Chemical Composition (%)
Steel Class
C
max
Si
Mn
P
max
S
max
Ni
max
Cr
max
Mo
max
V
max
A105
0.35
0.10-0.35
0.60-1.05
0.035
0.040
0.40
0.30
0.12
0.08
MSS-SP-75 Fitting Chemical Composition(%)
Si
S
Mn
P
C
Mo
Cr
Ni
Cu
V
Cb
Ti
Max
0.5
0.035
1.6
0.035
0.3
0.13
0.25
0.5
0.5
0.13
0.1
0.05
Forged vs. Buttweld Fittings
Forged fittings are used for piping systems below 2 or 4 inches in
diameter (4″ for 2000#/3000# fittings, 2″ for 6000#/9000#
fittings), whereas buttweld fittings are used for larger diameter
piping.
The two main types of forged fittings are the so-called socket weld
fittings (which are connected to pipes by fillet welds) and
threaded fittings (the pipe is screwed onto the fitting).
The ASME B16.11, MSS SP 75, MSS SP 83, MSS SP 95 specifications
cover forged fittings (socket weld and threaded) to fit ASME B36.10
and ASME B36.19 carbon, alloy, stainless steel and nickel alloy
pipes of small bore size.
Forged fittings are manufactured from solid blocks of steel, that
are machined to obtain the final required shape within the
tolerances set by the applicable specifications mentioned above.
This is different from buttweld fittings, which are manufactured by
cutting, bending and shaping seamless or welded steel pipes.
Forged Fittings Types
Socket weld and threaded fittings are available in multiple shapes
(elbows, tees, caps, adapters, couplings, etc), sizes (bore sizes
between 1/8 and 4 inches, and ratings as 2000#, 3000#, 6000#,
9000#) and material grades (the most common are ASTM A105, ASTM
A350 LF1/2/3/6 for low-temperatures, ASTM 182 for corrosive,
high-temperature applications). The class of the fitting represents
the maximum allowed pressure that the device can withstand.
Class 3000 fittings are used for pipes in schedule 80/XS; Class
6000 for pipes Sch. 160; Class 9000 fittings for pipes with larger
wall thickness (XXS).
Forged Elbow 45/90 Degrees
Forged elbows are used to change the direction of the piping system
by 45 or 90 degrees. Forged elbows are manufactured according to
ASME B16.11 in various material grades, either with socket weld or
threaded pipe connections. A special type is the so-called “street
elbow”.
Forged elbows 45 and 90 degrees, street elbow.
Forged Tee (Equal/Reducing)
Forged tees are used to branch a pipe at 90 degrees. Tees can be
straight (equal) or reducing.
Forged tees ASME B16.11 are available with socket weld or threaded
connections (NPT or BSP). The dimensions of forged tees are covered
by the MSS SP 75 and the ASME B16.11 specifications.
Forged Lateral
Forged laterals feature a Y shape and are used to branch a pipe at
30-degrees (or different angles, according to the piping
specifications).
Forged Plug (Round, Squared, Hex)
Forged plugs are available with a round, squared or hexagonal head
and are used to blind pipes.
Bushings
Hexagonal bushings are manufactured in accordance with ASME B16.11
and are used to join two threaded items of a different size.
Couplings (Half, Full)
Couplings are forged fittings manufactured in accordance with ASME
B16.11 and are used to join pipes.
They are available in half or full size and with socket weld or
threaded connections (or a combination of the two for special
piping applications).
Reducers and Reducer Inserts
Reducers are available in two main types, called 1 and 2. They are
used to connect pipes and reduce the bore size.
Union
Unions are available in the male to female, female to female types,
lug nut, and Rockwood design. Unions comply with the MSS SP 83
standard.
Welding Boss
SOCKET WELD VS. THREADED FITTINGS
ASME B16.11 forged fittings are available with two types of end
connections, which are called “socket weld” and “threaded” (shown
in the picture).
SOCKET WELD FITTINGS
Socket weld fittings are connected to pipes by fillet welds,
whereas threaded fittings are screwed onto the pipe (or
vice-versa).
A socket weld fitting (left side) and a threaded fitting (right
side).
Socket weld fittings are used for applications where strong and
long-lasting connections are required. Socket weld fittings are very reliable but are time-consuming to
install in a piping system (due to the heavy workload caused by
welding operations on small parts).
Socket weld fittings are available in sizes from 1/8 to 4 inches
and in classes between 2000# and 9000#.
The typical applications for socket weld fittings are:
Steam
Explosive fluids and gases
Acids and toxic fluids
Long service / durable installations
Fillet weld vs. Butt Weld: a butt welding connection fills the gaps
between two devices, that are beveled at 30 degrees.
THREADED FITTINGS
Threaded fittings are used for less-critical piping systems, such
as water distribution, fire protection, and cooling, or for
low-pressure installations not subject to vibration, elongation and
bending forces. Threaded pipe fittings are not suited for fluids with constantly
changing temperatures, as sudden changes may crack the connection.
The two major types of threads are the BSP and NPT, which are not
compatible one with the other:
BSP Fittings
BSP means “British Standard Pipe” and can be further divided into
the BSPT (tapered) and BSPP (parallel) variations. The threads have
a 55° angle in this case. BSP threaded fittings are less common
than NPT threaded fittings in the oil and gas industry
NPT Fittings
NPT stands for “National Pipe Tapered” and is the dominant standard
for threaded forged fittings in the oil and gas industry. NPT
threading is covered by the ASME B1.20.1 specification and is based on 60° thread flank angles (vs. 55° of
the BSP type).
BSP (BSPP/BSPT) vs NPT: thread angle 55 vs 60 Deg.
Kasugai Shanghai, a subsidiary of Kasugai Group headquartered in
Osaka, Japan, was established in 2003 as a representative office in
Shanghai, China, and was upgraded to a company in 2008. Kasugai
Shanghai serves as an important force of Kasugai Group in Asia, and
over the past 20 years, it has become a key player in the
industrial pipes, fittings, flanges, and valves market.
Kasugai Shanghai leverages the resources and manufacturing
capabilities of local suppliers in China to provide a wide range of
products, including stainless steel, carbon steel, duplex/super
duplex steel, alloy steel, nickel alloy, and titanium alloy,
according to various international standards such as
ASTM/ASME/ANSI, JIS, EN, and DIN. The company also has a local
support team and an on-site quality inspection team to ensure that
products meet the specifications and quality requirements of
customers.
With the support of high-quality local suppliers and a strong
commitment to customer satisfaction, Kasugai Shanghai strives to
provide reliable products and services to customers in Asia and
beyond. Kasugai Group's establishment of Kasugai Shanghai and other
international operations demonstrates their proactive approach to
globalization and their commitment to meeting the needs of
customers in a rapidly changing global market.
Kasugai Group Company Profile:
Foundation : June, 1925
Legal Representative : Akinori Kasugai
Number of employees : 140 persons (150 persons including employees
of the affiliates) As of March 21, 2023
Scope of business : wholesaler and trade firm of industrial
pipe/tube, fittings, flanges and valves
Fukuoka, Kitakyushu, Tokai, Kyoto, Shunan, Tokyo, USA (Watchung,
N.J.), Jiangyin (Jiangsu, China)
Our Strengths:
Since our foundation in 1925, we have continuously taken steps to
further grow our businesses. Global capabilities, professionalism,
and trust. These three strengths are the reason that customers
continue to choose Kasugai, regardless of the period.
-Global capabilities
We embarked on overseas procurement ahead of our competitors in the
industry and have established a supplier network that can meet a
variety of market demands. We are successfully chosen by many
overseas customers as a global procurement partner.
- Professionalism
Leveraging expertise cultivated over many years, we deliver optimal
products to the optimal place at the optimal time. Our excellent
information gathering and problem-solving abilities are also
invaluable for solving customer issues.
- Trust
We provide smooth, prompt services by cultivating solid
relationships of trust with suppliers. We believe that building
stronger partnerships is the source of our growth.
