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FITTING

WROUGHT STEEL BUTTWELD PIPE FITTING
  • 90° ELBOW
  • 45° ELBOW
  • STRAIGHT TEE
  • CONCENTRIC REDUCER
  • CAP
ITEM SIZE
ELBOW [45°/90°/180°] 1/2” - 94”
TEE [STRAIGHT/REDUCING] 1/2” - 84”
REDUCER [CONCENTRIC/ECCENTRIC] 1/2” - 48”
CAP 1/2” - 132”

FORGED STEEL FITTING
  • ELBOW
  • TEE
  • CAP[HEX/ROUD]
  • PLUG
    [HEX/ROUND/SQUARE]
  • UNION
  • COUPLING [FULL/HALF]
  • SOCKOLET
  • THREADOLET
  • NIPPLEOLET
  • SWAGE NIPPLE
PRESSURE RATINGS The Fittings shall be designated as pressure classes 2000,3000, and 6000 for threaded end fittings and class 3000, 6000 and 9000 for socket-weld end fittings.

Table 1. Correlation of Fittings Class with Schedule Number or Wall Designation of Pipe for Calculation of Ratings.

Pressure class Designation of fitting Type of Fitting Pipe Used for Rating Basic
Schedule No. Wall Designation
2000 lb Threaded 80 X-S
3000 lb Threaded 160 -
6000 lb Threaded - XX-S
3000 lb Socket-Welding 80 X-S
6000 lb Socket-Welding 160 -
9000 lb Socket-Welding - XX-S

This table is not intended to restrict the use of pipe of thinner or thicker Wall with fittings. Pipe actually used may be thinner or thicker in nominal Wall than that shown in Table 1. When thinner pipe is used its strength may Govern the rating. When thicker pipe is used, the strength of the fitting governs the rating.

Table 2. Nominal Wall Thickness of Schedule 160 and Double Extra Strong Pipe

NPS Schedule 160 XX-S
Inch mm Inch mm
1/8 0.124 3.15 0.190 4.83
1/4 0.145 3.68 0.230 6.05
3/8 0.158 4.01 0.252 6.40

MATERIAL
Ferrous Material
Material Classification Comparison as Nations
Large Middle Small ASTM (U.S.A.)
Disignation Identification
Ferrous
(Base Material: Fe) 		Carbon Steel Ambient and Higher
Temperature Service		 A234 WPB
WPC
Low Temperature
Service		 A420 WPL3
WPL6
WPL9
Alloy Steel (Cr≥1%) Low Alloy (1%≤Cr≤9%) A234 WP1
WP12
WP11
WP22
WP5
WP23
WP9
WP91
WP92
High Alloy (Cr≥12%)
Stainless Steel		 Martensitic Stainless Steel A815 WP410
Ferritic Stainless Steel WP430
Austenitic
Stainless Steel		 A403 WP304/L
WP316/L
WP317/L
WP321/H
WP347/H
Super Austenitic
Stainless Steel		 A403 S31254
904L
Ferritic / Austenitic
(Duplex / Super Duplex)		 A815 S31803
S32750
S32760

*Applicable Code / Standard : ASTM Part A, Latest Edition.
Non Registered materials on ASTM Latest Edition

Non-Ferrous Material Comparison
Material Classification Trade Mark UNS No.
Non-Ferrous
(Base Material : Ni)		 Inconel 600 N06600
Inconel 690 N06690
Inconel 800HL/800HT N08810 / N08811
Inconel 625 N06625
Inconel 825 N08825
Hastelloy B2 N10665
Hastelloy C276 N10276
Hastelloy C22 N06022
Incoloy 020 N08020
Monel 400 N04400
Monel K500 N05500
Non-Ferrous
(Base Material : Cu)		 Cu-Ni 70/30 C71500
Cu-Ni 90/10 C70600

*Applicable Code / Standard : ASTM Part B, Latest Edition


SPECIFICATION
KS: KOREAN INDUSTRIAL STANDARDS
KS B 1522 Steel Butt Welding Pipe Fittings for Ordinary use and Fuel Gas.
KS B 1541 Steel Butt Welding Pipe Fittings.
KS B 1542 Steel Socket Welding Pipe Fittings.
KS B 1543 Steel Plate Butt Welding Pipe Fittings.
JIS: JAPANESE INDUSTRIAL STANDARDS
JIS B 2311 Steel Butt Welding Pipe Fittings for Ordinary use.
JIS B 2312 Steel Butt Welding Pipe Fittings.
JIS B 2313 Steel Plate-Butt Welding Pipe Fittings.
JIS B 2316 Steel Socket Welding Pipe Fittings.
ASTM: AMERICAN SOCIETY FOR TESTING AND MATERIALS
ASTM A 105 Carbon Steel Forgings for Piping Applications.
ASTM A 182 Forged or Rolled Alloy-Steel Pipe Flanges, Forged Fittings and Valves and Parts for High-Temperature Service
ASTM A 234 Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service.
ASTM A 350 Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components.
ASTM A 403 Wrought Austenitic Stainless Steel Piping Fittings.
ASTM A 420 Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low Temperature Service.
ASTM A 694 Carbon and Alloy steel Forging for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service.
ASTM A 815 Wrought Ferritic, Ferrite / Austenitic, and Martensitic Stainless steel Piping Fittings.
ASTM A 860 Wrought High-Strength Low-Alloy steel Butt Welding Fittings.
ASTM A 366 Factory-Made Wrought Nickel and Nickel Alloy Fittings.
MSS: MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS INDUSTRY
MSS SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions.
MSS SP-43 Wrought Stainless Steel Butt Welding Fittings.
MSS SP-44 Standard for Steel Pipe Line Flanges.
MSS SP-75 Specification for High Test Wrought Butt Welding Fittings.
MSS SP-79 Socket Welding Reducer Inserts.
MSS SP-83 Carbon Steel Pipe Unions Socket welding and Threaded.
MSS SP-87 Factory-Made Butt Welding Fittings for Class 1 Nuclear Piping Applications.
MSS SP-95 Swage(d) Nipples and Bull Plugs.
MSS SP-97 Integrally Reinforced Forged Branch Outlet Fittings-socket Welding, Threaded and Butt Welding Ends.
ASME: AMERICAN SOCIETY OF MECHANICAL ENGINEERS
ASME B 16.5 Pipe Flanges and Flanged Fittings.
ASME B 16.9 Factory Made Wrought Steel Butt-Welding Fittings.
ASME B 16.11 Forged Steel Fittings, Socket-Welding and Threaded.
ASME B 16.25 Butt-Welding Ends.
ASME B 36.10 Welded and Seamless Wrought Steel Pipe.
ASME B 36.19 Stainless Steel Pipe.
ASME B 31.1 Power piping.
ASME B 31.3 Process piping.
ASME SECTION II Materials.
ASME SECTION III Rules for Construction if Nuclear Facility Components.
ASME SECTION V Nondestructive Examination.
ASME SECTION VIII Rules for Construction of Pressure Vessels.
ASME SECTION IX Welding and Brazing Qualifications.
API: AMERICAN PETROLEUM INSTITUTE
API 5L Line Pipe.

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