Find the most up-to-date version of ASTM D at Engineering ASTM D Lb9 LT5 m. D compaction are terms used interchangeably with preforming for PTFE. reground resin. Buy ASTM D Standard Specification for PTFE Molding and Molding and Extrusion Materials from SAI Global.

Author: Arajas Aramuro
Country: Turkey
Language: English (Spanish)
Genre: Business
Published (Last): 3 April 2009
Pages: 148
PDF File Size: 3.32 Mb
ePub File Size: 6.68 Mb
ISBN: 472-4-87227-970-2
Downloads: 41378
Price: Free* [*Free Regsitration Required]
Uploader: Shakazragore

Welding of the slide bearing component in every direction of movement. The lower the melt flow astm d the greater the melt viscosity and performance astm d highly aggressive situations. Using the appropriate bearing design asgm and maximum vertical load, select the proper lower bearing plate size and corresponding upper plate or sole plate size.

Unraveling Polymers: Charting the standards used in defining PTFE properties

For lower coefficient of friction applications, LUBRON TR slide bearing surfaces can be furnished with dimpled recesses to accommodate supplementary grease lubrication. We offer a variety of engineering services from the selection of bearing materials to in-house testing of bearing assemblies to d14577 load, movement, velocity, temperature and other environmental conditions present during the actual operation of LUBRON TR bearings.

We would therefore recommend that any customer looking to write a general lined piping specification bases it upon the ASME standards. Obviously, once we referenced DuPont, the client was d4157 and we were able to neatly define both the correct standard and the value with the proper reference.

A type of PTFE is determined by its method of preparation, processing attributes, mechanical properties and the end use for which the PTFE material is required. It gives details d the physical and mechanical attributes of all the astm d types of PTFE materials both before and after sintering.

Bearings which do not fully satisfy all the testing and inspection requirements shall be replaced or repaired to the satisfaction of the Project Engineer. Grade This reference defines the chemical composition and mechanical performance of the most ductile form of the two irons detailed in ASTM Astm d This material has exceptionally good cold forming properties.

Schedule This is a term for the internationally recognised range of nominal wall thicknesses for carbon steel and stainless steel pipes. The term grade B determines the chemical composition and mechanical performance of the steel used to make the pipe. These are obviously relevant for this specification, but the more generic data about lining materials is much less definitive than astm d ASME specifications.


Corrosion protection including painting and metallic coating of all exposed carbon steel surfaces shall be performed in accordance with Project Plans, Specifications and Special Provisions. Not to say that the values would have changed significantly, but QA is a continuous process and something published within the last decade might offer a lot of support to both manufacturers and OEMs alike.

It has over the years been used as the bench mark quality standard for the manufacture of PTFE Lined pipe and fitting throughout most of the world with astm d central Europe preferring the DIN equivalent. These materials are used for compression and Isostatic moulding and for Ram extrusion. The sole plate sliding surface shall be polished to a maximum 10 microinch 0.

Maximum vertical load is assumed to be the total dead and live loads. Much of this specification is taken up with test methods for d materials as delivered by the polymer manufacturer and how the sintered material is to be tested by the end user.

Deformation Under Load — Total deformation after 24H. However, as the table below shows, very few of the standards actually give any values.

The static coefficient of friction is only slightly higher than the dynamic value, minimizing stick-slip. It astm d details of the ashm and mechanical attributes of all the common types of PTFE materials both before and after sintering.

This specification astm d widely used in the Grade B form as the standard pipe material for Lined Pipe and Fittings manufacture.

The larger sole plate or slide bearing component should be installed in the upper position and fully cover the smaller slide bearing component in every direction of movement. SIZING GUIDE To accommodate maximum horizontal movement, the required upper bearing plate or stainless steel sole plate size for standard bearing plate sizes can be determined using the following table.

The steel is used in the fabrication of welded pressure vessels and boilers and is used where plate materials are required in the manufacture of pipe spool stub astm d and fittings components. It is generally a compilation of the original liner specific standards and includes astm d astj common lining materials plus several more unusual types. ISO deals with the requirements that organizations wishing to meet the standard have to fulfil.

Every phase of manufacture shall be monitored by Quality Control personnel to ensure that all materials and workmanship meet or exceed the requirements of the Project Plans, Specifications and Special Provisions. Static Coefficient of friction. Any remaining traces of contamination shall show satm as slight stains in the form of spots or stripes. LUBRON TR slide bearings x1457 self-lubricating and maintenance-free, and are designed to provide low coefficient of friction to accommodate thermal, mechanical and seismic movement.


Fluorinated Ethylene Propylene Copolymer (Melt Flow Index 10-35 MI)

For a whole list of properties, the standards only tell you how to check the value, but do not make any recommendations on what those values should be. Corrosion resistance especially astmm to stress corrosion cracking at elevated temperatures is determined by the molecular weight and structure of the PFA. Slide bearings shall accommodate the maximum total vertical load required unless otherwise specified.

The polymers space is vast and OEMs and processors alike are always in need of technical inputs to best evaluate which polymers are most suited to their specific end application.


PTFE sliding surfaces are essentially chemically inert and virtually unaffected by solvents, fuels and reagents. Much of this specification is astm d d with test methods for the materials as delivered by the polymer manufacturer and how the sintered material is to be tested by the wstm user.

The projected area of the smallest PTFE surface shall be designed for a working stress under full vertical load unless otherwise specified. ISO deals with the fundamentals of quality management systems, including the eight management principles on which the family of standards is based. It was written basically for two reasons, firstly to provide a s for the many types of lined system within a common document and secondly to regularise the various differing techniques used satm the major US manufacturers.

Interwoven with secondary glass fibers and bonded under pressure and temperature to carbon steel or stainless steel substrates, LUBRON TF bearings are capable of static loads up c1457 60, psi.

Stainless steel sole plate are also recommended for higher load applications. The qstm the melt flow index the greater the melt viscosity and performance in highly aggressive situations.