Pipe fitting

Pipe fitting is work that involves the installation or repair of pipes or tubes. Pipes and tubes are necessary for a wide range of reasons.

We are passionate about elbows, tees, reducer …

Pipe elbows >> Steel elbow is used to be installed between two lengths of pipe or tube allowing a change of direction,usually these carbon steel elbows distinguished by connection ends. + Long radius + Short radius

Pipe bending >> Pipe bend can be made of variety materials,like carbon steel,alloy steel,stainless steel,low temperature steel or high performance steel,etc. + 180 degree bending   + ASTM API 5L Gr.B bends

Pipe Tees >> We can provide seamless tube tees and welding tube tees,which can also be divided into straight tees and reducing tees.Usually,the pipe tees have the same inlet and oulet sizes. + Reducing tee   + Barred Tee   + Stainless Steel Tee

Cross >> A pipe fitting, having four openings in the same place, at right angles to each other.

End caps >> End Cap, Carbon Steel cap, Stainless Steel Caps, ANSI, ISO, JIS and DIN Standards, Measures 1/2 to 56 Inches. + Large size end caps  + Carbon steel end caps

Pipe reducer >> Pipe reducer are tube fittings that are widely used in a number of industries in order to providing greatest connection flexibility in connecting fractional tubes in various installations. + Concentric reducer  + Eccentric reducer

Stub end >> Stub Ends are fittings used in place of welded flanges where rotating back up flanges are desired. They are also called Lap Joints and Vanstone Flared Laps. A rotating back up flange seats itself against the back surface of the Stub End. + Stainless stub end   + Carbon steel Stub end

Coupling Fittings >> Coupling fittings are used for fluid conduits in which each end portion of two tubes to be connected is provided with a swaged-on adapter carrying the necessary means to connect or disconnect the tubes without disturbing the swaged-on adapter.

We have a team of experienced professionals with years of experience in manufacturing.

What exactly do you mean by pipe fittings?

Different from the tranditional process technique, we don't acid pickling at the last 2 steps, but directly bright annealing at the optimum temperature. Advantage: Guarantee the accurate thickness, smooth and balanced bright of both inside & outside surface

• How to Calculate a Pipe Bend?
• ASTM A234/ASME SA234M Standard Specification
• Type of Butt Weld Pipe Fittings
• Flanges Manufacturing Process
• ASTM A420 WPL6 Elbow and inspection
• Tolerance For butt Welding Fittings
• Let us get to know more about these froged fittings…

Pipe Fittings End Beveling

In the behavior, we make beveling after shot blasting, bevel ends are fully machined by advanced equipment Double Beveling Machine ensure the height, length, thickness, O.D. and I.D. are all qualified.
Welding Bevel acc. to

• ASME B16.9, Factory-Made Wrought Steel Buttwelding Fittings
• ASME B16.28, Buttwelding Short Radius Elbows and Returns
• ANSI/ASME B16.25, Buttwelding Ends
• MSS SP-97, Socket Welding, Threaded, and Buttwelding Ends

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Delivery requirment:

Marking: SunnySteel, material grade, standard, specification, heat no.

Surface Treatment: Bright annealed, polished outside and inside surface.

Package: Each pipe in a PVC bag and caps on both ends then bundled in wood case, (option: Bundle with knitted plastic bag/stee crate. )

Mill test certificate: according to EN 10204 3.2

Inspection:

Third party inspection, or by clints

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Fittings prologue >>

Pipe fittings are made from pipes, plates and forging material, which are used to change of direction & connected pipe size and diverge from main piping service.

The material of the stainless steel round bar is from Jiuli and Baosteel China, we control the quality from the very start. We polished three times to make sure the surface is perfect bright and smooth, and without any deficiency in quality. We have precision equipment to test according to the standard required and PMItest to check the material before delivery.

Note: PMI(Project Management Institute)

JIS, Japanese Industrial Standards for steel

Japanese Industrial Standards specifies the standards used for industrial activities in Japan. The standardization process is coordinated by Japanese Industrial Standards Committee and published through Japanese Standards Association.

JIS G3429 Seamless steel tubes for high pressure gas cylinder.

In the Meiji era, private enterprises were responsible for making standards. However, the Japanese government did have standards and specification documents for procurement purposes for certain articles, such as munitions. These were summarized to form an official standard old JES in 1921. During World War II, simplified standards were established to increase matériel output. The Industrial Standardization Law was enacted in 1949, which forms the legal foundations for the present Japanese Industrial Standards.

The Industrial Standardization Law was revised in 2004 and the JIS mark product certification system was changed. Standards are named like “JIS X 0208:1997″, where X denotes area division, followed by four digits (or five digits for some of the standards corresponding ISO standards) and the revision release year.

G – Ferrous Materials and Metallurgy
H – Nonferrous Materials and Metallurgy

MTC IN EN 10204.3

EN 10204:2004 is for metallic products-and this norm tell us things about Types of inspection documents. There are no material standards.
Mostly material is defined with its chemical composition and mechanical properties in a public standars like ISO, EN, JIS, ASTM etc.

JIS G3461

JIS G3461 Standard specifies the carbon steel tubes, hereinafter refered to as the tubes, used for exchanger heat on the inside and outside of the tube, such as water tubes, smoke tubes, superheater tubes, air preheater tubes, etc.

JIS G3445

JIS G3445 standard specifies the carbon steel tubes, hereinafter referred to as the thes, used for machinery, automobiles, bicycles, furniture, appliances and other machine parts.

JIS G3429, JIS G3429 standard specifies the seamless steel tubes

JIS G3429 standard specifies the seamless steel tubes, hereinafter referred to as the tube used for the manufacture of seamless steel gas cylinders specified in JIS B8230 and JIS B8241.

JIS G3454 STPG370, STPG410

JIS G3454 standard specifies the carbon steel pipes, hereinafter referred to as the pipes, used form pressure serive at an approximate maximum temperature of 350 cerus degree.

What is JIS?

Japanese Industrial Standards (JIS) specifies the standards used for industrial activities in Japan. The standardization process is coordinated by Japanese Industrial Standards Committee and published through Japanese Standards Association.

JIS Seamless Pipe

JIS seamless pipe is steel pipe that has been created by JIS and meets certain performance requirements. Manufacturers follow Japan Industrial Standards voluntarily. view the Tolerance of JIS seamless pipe

American National Pipe – NPT/NPS

American National pipe (NPT, NPS), Like British Standard Pipe (BSP), is designated by trade size, rather than actual diameter, as shown in the table below.

NPT Thread – American Standard Taper Pipe Thread (ANSI/ASME B1.20.1), Taper 1:16
Thread Form Data – Basic Dimensions of American National Standard Taper Threads, NPT (National Pipe Tapered)

There are two basic types of National pipe threads:

• NPT: National Pipe Taper
• NPS: National Pipe Straight

NPT threads are also sometimes referred to as

• MIP (Male Iron Pipe)
• FIP (Female Iron Pipe)
• IPT (Iron Pipe Thread)
• FPT (Female Pipe Thread)
• MPT (Male Pipe Thread)

Note that these references are somewhat casual, and might possibly be used in reference to NPS instead of NPT.

Both NPT and NPS have the same thread angle, shape, and pitch (threads per inch). However, NPT threads are tapered and NPS threads are straight (parallel). Both threads have a 60° included angle and have flat peaks and valleys (this is a Sellers thread form).

If you’ve worked with pipe much at all, you’ve probably noticed that the size of the pipe isn’t really what size the pipe is. Unlike tubing, which is generally specified by its OD, or hose, which is generally specified by its ID, pipe is specified by something else… its Trade Size. So when you say “3/4 pipe,” you’re actually saying “pipe whose OD is a little more than an inch, and whose ID is about 53/64.” -that is, if you are talking about schedule 40 pipe, which is generally what is used for most plumbing applications.

Pipe dimensions are specified by trade size and schedule, according to the following table. Note that while British Standard Pipe dimensions are similar, they are not equivalent to the American Standard Pipe Sizes. See NPT vs. BSP Pipe for thread comparisons.

Nominal Pipe Size (inch)	Number of threads per inch	Outside Diameter (inch)	Outside Diameter (mm)	Pitch of thread		Depth of thread		Truncation, max.”**		Pitch diameter at plane of hand-tight engagement		Length from end of pipe to plane of hand-tight engagement		Length of useful thread		Length of washout thread		Pitch Diameter at Beginning of External Thread Start (inch)	Effective Thread, External Diameter (inch)
				P		h		l		E		L1		L2
				in	mm	in	mm	in	mm	in	mm	in	Threads	in	Threads	in	Threads
1⁄16	27	0.3125	7.938	0.03704	0.941	0.02963	0.753			0.28118		0.16		0.2611		0.1285	3.47	0.27118	0.28750
1/8″	27	0.405	10.287	0.03704	0.941	0.02963	0.753	0.00360	0.091	0.37360	9.489	0.162	4.36	0.2639	7.12	0.1285	3.47	0.36351	0.38000
1/4″	18	0.540	13.716	0.05556	1.411	0.04444	1.129	0.00490	0.124	0.49163	12.487	0.228	4.10	0.4018	7.23	0.1928	3.47	0.47739	0.50250
3/8″	18	0.675	17.145	0.05556	1.411	0.04444	1.129	0.00490	0.124	0.62701	15.926	0.240	4.32	0.0478	7.34	0.1928	3.47	0.61201	0.63750
1/2″	14	0.840	21.336	0.07143	1.814	0.05714	1.451	0.00560	0.142	0.77843	19.772	0.320	4.48	0.5337	7.47	0.2478	3.47	0.75843	0.79179
3/4″	14	1.050	26.670	0.07143	1.814	0.05714	1.451	0.00560	0.142	0.98887	25.117	0.339	4.75	0.5457	7.64	0.2478	3.47	0.96768	1.00179
1″	11.5	1.315	33.401	0.08696	2.209	0.06957	1.767	0.00630	0.160	1.23863	31.461	0.400	4.60	0.6828	7.85	0.3017	3.47	1.21363	1.25630
1-1/4″	11.5	1.660	42.164	0.08696	2.209	0.06957	1.767	0.00630	0.160	1.58338	40.218	0.420	4.83	0.7068	8.13	0.3017	3.47	1.55713	1.60130
1-1/2″	11.5	1.900	48.260	0.08696	2.209	0.06957	1.767	0.00630	0.160	1.82234	46.287	0.402	4.83	0.7235	8.32	0.3017	3.47	1.79609	1.84130
2″	11.5	2.375	60.325	0.08696	2.209	0.06957	1.767	0.00630	0.160	2.29627	58.325	0.436	5.01	0.7565	8.70	0.3017	3.47	2.26902	2.31630
2-1/2″	8	2.875	73.025	0.12500	3.175	0.10000	2.540	0.00780	0.198	2.76215	70.159	0.682	5.46	1.1375	9.10	0.4337	3.47	2.71953	2.79062
3″	8	3.500	88.900	0.12500	3.175	0.10000	2.540	0.00780	0.198	3.38850	86.068	0.766	6.13	1.2000	9.60	0.4337	3.47	3.34062	3.41562
3-1/2″	8	4	101.600	0.12500	3.175	0.10000	2.540	0.00780	0.198	3.88881	98.776	0.821	6.57	1.2500	10.00	0.4337	3.47	3.83750	3.91562
4″	8	4.5	114.300	0.12500	3.175	0.10000	2.540	0.00780	0.198	4.38712	111.433	0.844	6.75	1.3000	10.40	0.4337	3.47	4.33438	4.41562
5″	8	5.563	141.300	0.12500	3.175	0.10000	2.540	0.00780	0.198	5.44929	138.412	0.937	7.50	1.4063	11.25	0.4337	3.47	5.39073	5.47862
6″	8	6.625	168.275	0.12500	3.175	0.10000	2.540	0.00780	0.198	6.50597	165.252	0.958	7.66	1.5125	12.10	0.4337	3.47	6.44609	6.54062
8″	8	8.625	219.075	0.12500	3.175	0.10000	2.540	0.00780	0.198	8.50003	215.901	1.630	8.50	1.7125	13.70	0.4337	3.47	8.43359	8.54062
10″	8	10.750	273.050	0.12500	3.175	0.10000	2.540	0.00780	0.198	10.62094	296.772	1.210	9.58	1.9250	15.40	0.4337	3.47	10.54531	10.66562
12″	8	12.750	323.850	0.12500	3.175	0.10000	2.540	0.00780	0.198	12.61781	320.493	1.360	10.88	2.1250	17.00	0.4337	3.47	12.53281	12.66562
14″	8	14	355.600	0.12500	3.175	0.10000	2.540	0.00780	0.198	13.87262	352.365	1.562	12.50	2.2500	18.00	0.4337	3.47	13.77500	13.91562
16″	8	16	406.400	0.12500	3.175	0.10000	2.540	0.00780	0.198	15.87575	403.244	1.812	14.50	2.4500	19.60	0.4337	3.47	15.76250	15.91562
18″	8	18	457.200	0.12500	3.175	0.10000	2.540	0.00780	0.198	17.87500	454.025	2.000	16.00	2.6500	21.20	0.4337	3.47	17.75000	17.91562
20″	8	20	508.000	0.12500	3.175	0.10000	2.540	0.00780	0.198	19.87031	504.706	2.125	17.00	2.8500	22.80	0.4337	3.47	19.73750	19.91562
24″	8	24	609.600	0.12500	3.175	0.10000	2.540	0.00780	0.198	23.68094	606.066	2.375	19.00	3.2500	26.00	0.4337	3.47	23.71250	23.91562

Nominal Pipe Size (inch)	Number of threads per inch	Tapping Drills: Taper NPT with Reamer *			Tapping Drills: Taper NPT without Reamer			Tapping Drills: Straight NPS
		Drill Size	Equivalents (in)	Equivalents (mm)	Drill Size	Equivalents (in)	Equivalents (mm)	Drill Size	Equivalents (in)	Equivalents (mm)
1⁄16	27	15/64″	0.2344	5.9531	C	0.242	6.1468	1/4″	0.25	6.35
1/8″	27	21/64″	0.3281	8.3344	Q	0.332	8.4328	11/32″	0.3438	8.7313
1/4″	18	27/64″	0.4219	10.7156	7/16″	0.4375	11.1125	7/16″	0.4375	11.1125
3/8″	18	9/16″	0.5625	14.2875	37/64″	0.5781	14.6844	19/32″	0.5938	15.0813
1/2″	14	11/16″	0.6875	17.4625	45/64″	0.7031	17.8594	23/32″	0.7188	18.2563
3/4″	14	57/64″	0.8906	22.6219	29/32″	0.9063	23.0188	15/16″	0.9375	23.8125
1″	11.5	1-1/8″	1.125	28.575	1-9/32″	1.2813	32.5438	1-5/32″	1.1563	29.3688
1-1/4″	11.5	1-15/32″	1.4688	37.3063	1-31/64″	1.4844	37.7031	1-1/2″	1.5	38.1
1-1/2″	11.5	1-23/32″	1.7188	43.6563	1-23/32″	1.7188	43.6563	1-3/4″	1.75	44.45
2″	11.5	2-5/32″	2.1563	54.7688	2-3/16″	2.1875	55.5625	2-3/16″	2.1875	55.5625
2-1/2″	8	2-25/32″	2.7813	70.6438	2-5/8″	2.625	66.675	2-5/8″	2.625	66.675
3″	8	3-9/32″	3.2813	83.3438	3-1/4″	3.25	82.55	3-1/4″	3.25	82.55
3-1/2″	8	3-3/4″	3.75	95.25	3-3/4″	3.75	95.25	3-3/4″	3.75	95.25
4″	8	4-1/4″	4.25	107.95	4-1/4″	4.25	107.95	4-1/4″	4.25	107.95
5″	8	5-1/4″	5.25	133.35	5-9/32″	5.2813	134.1438	5-5/16″	5.3125	134.9375
6″	8	6-1/4″	6.25	158.75	6-11/32″	6.3438	161.1313	6-3/8″	6.375	161.925

Notes:  * Ream the hole before tapping with a reamer having a taper of 3/4 inch per foot. Pipe Size is the accepted industry designation and does not refer to either the inside or the outside diameter (ID or OD) of a pipe or a fitting. Dimensions in Inches except where statedE= Pitch diameter at hand-tight plane. This is also the pitch diameter at the gauge plane. **’= Truncation from point of thread triangle to flat (not shown in diagram). Minimum = 0.033P for all pitches. See table for maximum. Tolerances: When using L1 gauges to check threads, the thread is within permissible tolerance if the ring gauge face, or plug gauge notch, is +/- 1 turn from being flush with the end of the thread.Example designation: 3/8 – 18 NPT where 3/8 = nominal pipe size 18 = number of threads per inch NPT = symbol for the thread series and form (i.e., National (American)Standard Pipe, Taper) Note- Basic dimensions are given to four or five decimal places to eliminate errors when calculating gauge dimensions, they do not imply a greater degree of precision than is normally obtainable.

L1= Length of normal hand-tight engagement. This is also the L1 gauge length.
(Longer thread engagement may be used in special applications, such as flanges
for high pressure use. In such cases the pitch diameter, E, remains as specified
and the diameter at the end of the pipe is proportionally smaller.)
L2= Effective Length of thread