ASTM A335 P5 is an alloy steel seamless ferritic high temperature pipe of American standard. Alloy tube is a kind of seamless steel tube, its performance is much higher than the general seamless steel tube, because this kind of steel tube contains more C, the performance is less than the ordinary seamless steel tube, so the alloy tube is widely used in petroleum, aerospace, chemical, electric power, boiler, military and other industries.
Alloy Steel pipe contains substantial quantities of elements other than carbon such as nickel, chromium, silicon, manganese, tungsten, molybdenum, vanadium and limited amounts of other commonly accepted elements such as manganese, sulfur, silicon, and phosphorous
Corresponding domestic alloy steel :1Cr5Mo GB 9948-2006 "Seamless Steel Pipe Standard for Petroleum Cracking"
- 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.
Overview
| Standard: ASTM A335 |
Alloy Or Not: Alloy |
| Grade Group: P5 |
Application: Boiler Pipe |
| Thickness: 1 - 100 Mm |
Surface Treatment: As Customer's Requirement |
| Outer Diameter(Round): 10 - 1000 Mm |
Technique: Hot Rolled/ Cold Drawn |
| Length: Fixed Length Or Random Length |
Heat Treatment: Annealing/Normalizing/Tempering |
| Section Shape: Round |
Special Pipe: Thick Wall Pipe |
| Place Of Origin: China |
Usage: High Pressure Steam Pipe, Boiler And Heat Exchanger |
| Certification: ISO9001:2008 |
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
Chemical Component
|
Compositions
|
Data
|
| UNS Designa-tion |
K41545 |
| Carbon(max.) |
0.15 |
| Manganese |
0.30-0.60 |
| Phosphorus(max.) |
0.025 |
| Silicon(max.) |
0.50 |
| Chromium |
4.00-6.00 |
| Molybdenum |
0.45-0.65 |
| Other Elements |
… |
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
Heat Treatment
| Grade |
Heat Treatment Type |
Normalizing Temperature Range F [C] |
Subcritical Annealing Or Tempering |
| P5, P9, P11, And P22 |
Temperature Range F [C] |
| A335 P5 (B,C) |
Full Or Isothermal Anneal |
|
|
| A335 P5b |
Normalize And Temper |
***** |
1250 [675] |
| A335 P5c |
Subcritical Anneal |
***** |
1325 – 1375 [715 - 745] |
Tolerance
For Pipe Ordered To Inside Diameter, The Inside Diameter Shall Not Vary More Than ±1 % From The Specified Inside Diameter
Permissible Variations In Outside Diameter
| NPS Designator |
Positive tolerance |
negative tolerance |
| 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 |
±1 % Of The Specified
Outside
Diameter |
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
Material & Manufacture
Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.
Heat Treatment
Mechanical Tests Specified
- Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test
- For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. For small lots, at least one pipe shall be tested.
- For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe.
Notes for 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.
- The bend test specimens shall be bent at room temperature through 180 without cracking on the outside of the bent portion.
ASTM A335 P5 seamless steel tubes are suitable for water, steam, hydrogen, sour oil, etc. If used for water vapor, its maximum operating temperature is 650℃; When used in working medium such as sour oil, it has good high-temperature sulfur corrosion resistance, and is often used in high-temperature sulfur corrosion conditions of 288~550℃.
Production process:
1. Hot rolling (extruded seamless steel tube) : round tube billet → heating → perforation → three-roll cross rolling, continuous rolling or extrusion → tube stripping → sizing (or reducing) → cooling → straightening → water pressure test (or defect detection) → marking → storage
2. Cold drawing (rolling) seamless steel tube: round tube billet → heating → perforation → heading → annealing → pickling → oiling (copper plating) → multi-pass cold drawing (cold rolling) → blank tube → heat treatment → straightening → water pressure test (flaw detection) → marking → storage
Application Scenarios:
In atmospheric and vacuum devices for processing high-sulfur crude oil, ASTM A335 P5 seamless steel tubes are mainly used for the bottom pipelines of atmospheric and vacuum towers, furnace tubes of atmospheric and vacuum furnaces, high-speed sections of atmospheric and vacuum oil conversion lines and other high-temperature oil and gas pipelines containing sulfur.
In FCC units, ASTM A335 P5 seamless steel tubes are mainly used in high-temperature slurry, catalyst and return refining pipelines, as well as some other high-temperature sulfur oil and gas pipelines.
In delayed coking unit, ASTM A335 P5 seamless steel pipe is mainly used for high temperature feed pipe at the bottom of coke tower and high temperature oil and gas pipe at the top of coke tower, furnace pipe at the bottom of coke furnace, pipe at the bottom of fracking tower and some other high temperature oil and gas pipe containing sulfur.