Company Details
Shijiazhuang Bang dong Pipeline Technology Co,Ltd.
Payment Type: | L/C,T/T |
---|---|
Incoterm: | FOB,CFR,CIF |
Min. Order: | 1 Piece/Pieces |
Model No.: En10253-1 Fitting
Brand: BD
Type: Equal
Connection: Welding
Material: Carbon Steel
Shape: Equal Tee
Lateral: 90°Tee
Head Code: Round
Wall Thickness: XXS
Finish: Black Painting
Technics: Forged
Pressure Rating: 2000LBS
Standard: ASTM
Certification: BV
Packaging: Wooden Case or Pallet or as per buyer's requirements
Productivity: 1000pcs/month
Transportation: Ocean,Land,Air,DHL/TNT
Place of Origin: Cangzhou,China
Supply Ability: 1000pcs/month
Certificate: ISO/API/CE
HS Code: 73079300
Port: Tianjin New Port,Zhengzhou Train Station,Beijing Air Port
Payment Type: L/C,T/T
Incoterm: FOB,CFR,CIF
Available of En10253-1 Fitting and En10253-2 Fitting
When we talk about a tee NPS 3, a equal or straight tee is intended. With a tee NPS 3 x 2 a reducing tee is intended. Although, officially a reducing tee will be indicated by 3 diameters, namely 3 x 3 x 2 (A x B x C). The A & B measure stands for the Nominal Pipe Size of Run-Pipe, C measure stands for Nominal Pipe Size of Outlet.
This designation actually is superfluous, but comes from the time that tees were available in 3 different ends of diameters, such as
4 x 3 x 2 (A x B x C). In this implementation of course it is necessary, to specify 3 different sizes.
That kind of tees is probably no longer available. Applying a equal tee with a concentric or eccentric reducer is now the usual practice.
A straight or equal buttwelding Tee is available for all common diameters.
A Reducing Tee not, because many diameters are not produced, or can not be produced.
As an example: a reducing tee NPS 6 x 4 is a standard item for most suppliers, but a reducing tee NPS 16 x 2 is probably not available by any supplier.
It would also not economical to use a NPS 16 tee with a NPS 2 outlet; in such situations a Branch Fitting will be used or a Branch Connection will be made.
In addition to the defined tees, there are straight and reducing crosses.
Straight crosses are generally stock items, reducing crosses are often difficult to obtain.
I have never used that tees and I have they never seen in practice, at least not in petro and chemical industry. They will be used where space is limited, by revision work, in shipping industry et cetera.
By the shape of a tee, the wall thickness can be a critical item. Asme B16.9 only standardizes the end-to-end dimensions, center-to-end dimensions and some "squareness" dimensional tolerances.
The wall thickness at the weld line location even is standardized, but not through the rest of the fitting. The standard states that the minimum tolerance will be within 12.5% of the minimum ordered wall thickness of the pipe. A maximum tolerance is specified only at the ends of the fitting.
Many providers of welding tees (and elbows) provide one schedule greater thickness so that sufficient wall thickness, after forming, remains. In Tee's, the crotch radius (T) varies from one manufacturer to another, but some establish itself as a requirement, 1.3 times the wall thickness to maintain the crotch.
Crotch of a buttweld tee
Carbon steel: ASTM/ASME A234Wpb -WPC
Alloy steel: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP 911
Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N
ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti
ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H
Low temperature steel: ASTM/ASME A402 WPL 3-WPL 6
High performance steel: ASTM/ASME A860 Wphy60 42-46-52--65-70
Size range: 1/2 to 72 inches
Pressure: SCH5 to SCH160
Related products
ASTM A312 45 Degree Lateral Tee
ASTM A197 Galvanized Steel Pipe Cross
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Product Categories : Butt Weld Pipe Fitting > Pipe Equal/Reducing Tee