Subcritical Annealing or Tempering Temperature Range F [C]
P5 (b,c)
Full or Isothermal Anneal
Normalize and Temper
*****
1250 [675]
Subcritical Anneal (P5c only)
*****
1325 – 1375 [715 – 745]
P9
Full or Isothermal Anneal
Normalize and Temper
*****
1250 [675]
P11
Full or Isothermal Anneal
Normalize and Temper
*****
1200 [650]
P22
Full or Isothermal Anneal
Normalize and Temper
*****
1250 [675]
P91
Normalize and Temper
1900-1975 [1040 – 1080]
1350-1470 [730 – 800]
Quench and Temper
1900-1975 [1040 – 1080]
1350-1470 [730 – 800]
Tensile Requirements :
Seamless
P-5
P-9
P-11
P-22
P-91
P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].
Tensile Strength, min., psi
ksi
60
60
60
60
85
MPa
415
415
415
415
585
Yield Strength, min., psi
ksi
30
30
30
30
60
MPa
205
205
205
205
415
Wall Thickness :
NPS [DN] Designator
Tolerance, % from Specified
Over
Under
1/8 to 2 1/2 [6 to 65] incl., all t/D ratios
20.0%
12.5%
Above 2 1/2 [65], t/D < or = 5%
22.5%
12.5%
Above 2 1/2 [65], t/D > 5%
15.0%
12.5%
(t = Specified Wall Thickness; D = Specified Outside Diameter)
Frequently Asked Questions
Easy to enjoy our service by scan the follow Frequently Asked Questions
Q: What kind of material does HONGCHENG supply?
HONGCHENG generally specializes in alloy steel and specialty alloys. Some of these specialty alloys include Alloy 20, Duplex Alloys, Nickel Alloys such as various grades of Hastelloy (C276, C22), Aluminum, Chrome Moly ASTM A/ASME SA 335 P1, P2, P5, P9, P11, P12,P22, P23, P91, and P92. we also offer bending,CNC machining, coating service.
Q. What the define of pipe fittings? Pipe fitting is the occupation of installing or repairing piping or tubing systems that convey liquid, gas, and occasionally solid materials. This work involves selecting and preparing pipe or tubing, joining it together by various means, and the location and repair of leaks. Pipe fitting work is done in many different trades: Plumbing, HVAC, manufacturing, fire prevention, and many others. Pipe fitters (sometimes called simply “fitters”) are represented in the USA by the United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry of the United States and Canada. Fitters work with a variety of pipe and tubing materials including several types of plastic, copper, steel, iron, aluminium, clay, and lead.
Q. What should I consider for buying pipe fittings? A. Material, Size, Temperature and Pressure Ratings, Durability, Standards,surface coating etc.
Q. What are threaded fittings? A. Thread fitting is the fitting with thread concetions,the regular screw standards are NPT and BSP.NPT is a U.S. standard for tapered threads used to join pipes and fitting and BSP is a family of standard screw thread types that has been adopted internationally for interconnecting and sealing pipe ends by mating an external (male) with an internal (female) thread.
Q. The define of flange? A. A flange is usually in the shape of a plate or ring which forms a rim at the end of a pipe when fastened to the pipe.
Q.Do you provide Material Test Reports (MTR’s) ? Relevant documents according to inspection test plan will be provide along with goods.
Q.What is a standard used in pipe fittings? A. Standards are certain authentication given in reference to manufacture and installation of the product . Some common standards are BSP, NPT, ANSI, ASME etc
Q. My questions is not answered in this FAQs section, what do I do now? A: Simply call us or email us at info@alloysteelfitting.com and we will do our best to effectively answer all of your product or order questions. .
All our pipe fitting and flange shipped with proper packing protection, and our factory with good experience on special products like polished pipe packing ,FBE coated fitting and pipe packing, oversizes fitting up to 3500mm packing&shipping.
Common shipping and packing for our products
Item
Producs
Dimension
Surface
Packing method
Shipping method
Remark
1
Flange
below 60in
varnish oil
wooden case
sea/air
2
Flange
over 60in
varnish oil
wooden pallet/steel frame
sea/air
For OD over 2.3m
3
Fitting
below 24in
varnish oil
wooden case/pallet
sea/air
4
Fitting
over 24in
black painting
wooden case/pallet
sea/air
5
Fitting
over 24in
black painting
Nude packing
Bulk vessel
For OD over 2.32m
6
Pipe
Below 8in
bundle
Woven bag/wooden case
sea/air
7
Pipe
over 8in
single piece
Woven bag/wooden case
sea/air
8
Gasket
all sizes
Cartons/wooden case
sea/air
9
Fastener
all sizes
Cartons/wooden case
sea/air
Also we can fulfill customized packing and delivery requirements. some of our products packing pictures as below
C&N Industiral,huitong limtied is professional pipe,flange and fitting manufacturer,our products approved by PDO, SADARA, SWCC,PDO etc.
