China Seamless steel tubes for high-pressure boilers ASTM A335/A335M-2018 Manufacturer and Supplier

Seamless steel tubes for high-pressure boilers ASTM A335/A335M-2018

Short Description:

Main material: P11 P12 P22 P5 P9 P23 P91 P92, production process: hot rolling, cold drawing.

P2 P12: manufactured by coarse-grain melting process, heat treatment requirements, see the standard for details.

Testing: Tensile, bending, hardness, water pressure test, non-destructive testing (ultrasonic, eddy current)

Payment: 30% deposit, 70% L/C or B/L copy or 100% L/C at sight

Min.Order Quantity: 1 PC

Supply Ability: Annual 20000 Tons Inventory of Steel Pipe

Lead Time: 7-14 days if in stock, 30-45 days to produce

Packing: Black Vanishing, bevel and cap for every single pipe; OD below 219mm need to pack in bundle, and each bundle no exceed 2 tons.

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Product Detail

Product Tags

Overview

Standard: ASTM A335

Grade Group: P5,P9,P11,P22,P91, P92 etc.

Thickness: 1 - 100 mm

Outer Diameter(Round): 10 - 1000 mm

Length: Fixed length or random length

Section Shape: Round

Place of Origin: China

Certification: ISO9001:2008

Alloy Or Not: Alloy

Application: Boiler Pipe

Surface Treatment: As customer's requirement

Technique: Hot Rolled/ Cold Drawn

Heat treatment: Annealing/normalizing/Tempering

Special Pipe: Thick Wall Pipe

Usage: high pressure steam pipe, Boiler and Heat Exchanger

Test: ET/UT

Application

It is mainly used to make high-quality alloy steel boiler pipe , heat exchanged pipe, high pressure steam pipe for petroleum and chemical industry

Main Grade

Grade of high-quality alloy pipe :P1,P2,P5,P9,P11,P22,P91,P92 etc

Chemical Component

Grade	UN	C≤	Mn	P≤	S≤	Si≤	Cr	Mo
Grade	Sequiv.	C≤	Mn	P≤	S≤	Si≤	Cr	Mo
P1	K11522	0.10~0.20	0.30~0.80	0.025	0.025	0.10~0.50	–	0.44~0.65
P2	K11547	0.10~0.20	0.30~0.61	0.025	0.025	0.10~0.30	0.50~0.81	0.44~0.65
P5	K41545	0.15	0.30~0.60	0.025	0.025	0.5	4.00~6.00	0.44~0.65
P5b	K51545	0.15	0.30~0.60	0.025	0.025	1.00~2.00	4.00~6.00	0.44~0.65
P5c	K41245	0.12	0.30~0.60	0.025	0.025	0.5	4.00~6.00	0.44~0.65
P9	S50400	0.15	0.30~0.60	0.025	0.025	0.50~1.00	8.00~10.00	0.44~0.65
P11	K11597	0.05~0.15	0.30~0.61	0.025	0.025	0.50~1.00	1.00~1.50	0.44~0.65
P12	K11562	0.05~0.15	0.30~0.60	0.025	0.025	0.5	0.80~1.25	0.44~0.65
P15	K11578	0.05~0.15	0.30~0.60	0.025	0.025	1.15~1.65	–	0.44~0.65
P21	K31545	0.05~0.15	0.30~0.60	0.025	0.025	0.5	2.65~3.35	0.80~1.60
P22	K21590	0.05~0.15	0.30~0.60	0.025	0.025	0.5	1.90~2.60	0.87~1.13
P91	K91560	0.08~0.12	0.30~0.60	0.02	0.01	0.20~0.50	8.00~9.50	0.85~1.05
P92	K92460	0.07~0.13	0.30~0.60	0.02	0.01	0.5	8.50~9.50	0.30~0.60

A New designation established in accordance with Practice E 527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS). B Grade P 5c shall have a titanium content of not less than 4 times the carbon content and not more than 0.70 %; or a columbium content of 8 to 10 times the carbon content.

Mechanical Property

Mechanical properties	P1,P2	P12	P23	P91	P92,P11	P122
Tensile strength	380	415	510	585	620	620
Yield strength	205	220	400	415	440	400

Heat Treatment

Grade	Heat Treatment Type	Normalizing Temperature Range F [C]	Subcritical Annealing or Tempering
Grade	P5, P9, P11, and P22	Normalizing Temperature Range F [C]	Temperature Range F [C]
A335 P5 (b,c)	Full or Isothermal Anneal
	Normalize and Temper	*****	1250 [675]
	Subcritical Anneal (P5c only)	*****	1325 – 1375 [715 - 745]
A335 P9	Full or Isothermal Anneal
	Normalize and Temper	*****	1250 [675]
A335 P11	Full or Isothermal Anneal
	Normalize and Temper	*****	1200 [650]
A335 P22	Full or Isothermal Anneal
	Normalize and Temper	*****	1250 [675]
A335 P91	Normalize and Temper	1900-1975 [1040 - 1080]	1350-1470 [730 - 800]
	Quench and Temper	1900-1975 [1040 - 1080]	1350-1470 [730 - 800]

Tolerance

For pipe ordered to inside diameter, the inside diameter shall not vary more than 6 1 % from the specified inside diameter

Permissible Variations in Outside Diameter

NPS Designator	in	mm	in	mm
1⁄8to 11⁄2, incl	1⁄64 (0.015)	0.4	1⁄64(0.015)	0.4
Over 11⁄2 to 4, incl.	1⁄32(0.031)	0.79	1⁄32(0.031)	0.79
Over 4 to 8, incl	1⁄16(0.062)	1.59	1⁄32(0.031)	0.79
Over 8 to 12, incl.	3⁄32(0.093)	2.38	1⁄32(0.031)	0.79
Over 12	6 1 % of the specified outside diameter

Test Requirement

Hydraustatic Test:

The Steel Pipe Should Be Tested Hydraulically One By One. The Maximum Test Pressure Is 20 MPa. Under The Test Pressure, The Stabilization Time Should Be Not Less Than 10 S, And The Steel Pipe Should Not Leak.

After The User Agrees, The Hydraulic Test Can Be Replaced By Eddy Current Testing Or Magnetic Flux Leakage Testing.

Nondestructive Test：

Pipes That Require More Inspection Should Be Ultrasonically Inspected One By One. After The Negotiation Requires The Consent Of The Party And Is Specified In The Contract, Other Non-Destructive Testing Can Be Added.

Flattening Test：

Tubes With An Outer Diameter Greater Than 22 Mm Shall Be Subjected To A Flattening Test. No Visible Delamination, White Spots, Or Impurities Should Occur During The Entire Experiment.

Hardness Test:

For pipe of Grades P91, P92, P122, and P911, Brinell, Vickers, or Rockwell hardness tests shall be made on a specimen from each lot

Bend Test:

For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test. Other pipe whose diameter equals or exceeds NPS 10 may be given the bend test in place of the flattening test subject to the approval of the purchaser