ASTM A335 P11 alloy steel pipe

　　ASTM A335 P11 is part of ASTM A335, and the pipe should be suitable for bending, flanging and similar forming operations, and suitable for welding.

　　The steel should meet the requirements of chemical composition, tensile properties and hardness. Water pressure test should be carried out in every pipe. In addition, each pipe should be inspected according to the required practice by NDT.

　　Mechanical test requirements for different pipelines, such as lateral or longitudinal tensile tests, flattening tests and hardness or bending tests, are presented.

　　The ends of each box will indicate order number, heat number, size, weight and binding or as required.

　　Outer Dimensions: 19.05mm – 114.3mm

　　Wall Thickness: 2.0mm – 14 mm

　　Length: max 16000mm

　　Steel grade: ASTM A335 P11

　　Packing:

　　Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.

　　Inspection and Test:

　　Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.

　　Surface treatment:

　　Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.

　　Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

　　Material & Manufacture

　　Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.

　　Heat Treatment

　　A / N+T

　　N+T / Q+T

　　N+T

　　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 Hardness Test:

　　P11 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].

　　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.

　　http://www.xysteelpipe.com/info/ASTM-A335-P11-alloy-steel-pipe-1205-1.htm

评论

发表评论

此博客中的热门博文

The main reason for the porosity of submerged arc welding seam

 Submerged arc welding technology is the welding process of SSAW steel pipe and LSAW steel pipe. During the welding process, in addition to insufficient penetration, burn-through and poor formation caused by improper welding process parameters, there will also be pores, slag inclusions, cracks, etc. Defects. This article mainly introduces the main reasons and preventive measures for porosity in submerged arc welding seams. (1) In the process of steel rolling or hot stamping and coiling, the oxide scale formed or fallen off, as well as the positioning welding slag shell, the carbon arc gas created flying slag, etc., are trapped in the flux, which will also cause pores in the weld. Preventive measures: ①The oxide skin that falls off during the process of coiling and bending should be cleaned or blown off with compressed air before assembly and welding to prevent it from being caught in the assembly gap or falling into the groove. ②The surrounding of the welding site should be clean t...
阅读全文

Standard for Choosing Oil Casing Pipe Manufacturers

 　　There are many standards for selecting oil casing manufacturers, which can be divided into short-term standards and long-term standards according to the length of time. The short-term standards for selecting oil casing manufacturers mainly include product quality, price level, timely delivery and overall service level. 　　1. Product quality 　　The quality of the purchased oil casing meets the requirements of the purchasing unit is a condition that the purchasing unit must consider when purchasing the oil casing. Poor quality and low price casing products have lower procurement costs, but will lead to an increase in the total cost, but if the quality is too high, it will far exceed the production requirements, which is also a waste. Therefore, the quality requirements of the oil casing in the procurement The production needs of the enterprise must be consistent, and the requirements are too high or too low are not appropriate. 　　2. Lower cost 　　A lower purchase price is an importan...
阅读全文

How to distinguish between ERW steel tube and seamless steel tube?

　　Today, Great Steel Pipe will tell you how to distinguish the ERW steel pipe and seamless steel pipe. 　　 ERW Steel Pipe 　　ERW is a specific type of welding process that is used to produce welded steel pipe, such as ERW steel pipe. Seam welding is commonly used during the manufacturing of round, square and rectangular steel tubing. The steel strip is unwound from coils and side-trimmed to control width and condition the edges for welding. The strip then passes through a series of contoured rollers which cold-form the material into a circular (square or rectangular) shape. The edges are forced together under pressure as a butt joint and then welded by heating the material to temperatures above 2000° F. The flash weld that has formed is now removed from the outside diameter of the tube. Once the weld has been tested the tube then passes through a series of sizing rolls to attain its precise finished size, after which the tube is then straightened and cut to length. 　 　Seamless Ste...
阅读全文