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Product Analysis
1.At the request of the purchaser,an analysis of one billet from each heat or two pipes from each lot shall be made by the manufacturer.A lot of pipe shall consist of the number of lengths as a function of size,as shown below,of length as a funition of size,as shown below, of length as a function of size,as shown below,of the same size and wall thickness from any one heat of steel:
| NPS [DN]designator | length of pipe in lot |
| under NPS 2[DN 50] | 400 or fraction thereof |
| NPS 2[DN 50] to NPS 5 | 200 or fraction thereof |
| [DN 125],incl over NPS 5 [DN 125] | 100 or fraction thereof |
2.The results of these analyses shall be reported to the purchaser or the purchaser;s representative,and shall conform to the requirements specified in Table 1.
3.If the analysis of one of the tests soecified in Section 8 does not conform to the requirements specified in Section 6,an analysis of each billet or pipr from the same heat or lot may be made,and all billets or pipe confoming to the requirements shall be accepted.
Mechanical Tests Required
1.Lot----For tension and flattening tests,the term'' lot '' applies to all pipe of the same nominal size and wall thickness [or schedule] that is produced from the same heat of steel and subjected to the same finishing treatment in a continuous furnace or by directly obtaining the heat treated condition by quenching after hot forming.When final heat treatment is in a quenching after hot forming.When final heat treatment is in a batch-type furnace,the lot shall include only that pipe which is heat treated in the same furnace charge.
2.Transverse or Longitudinal Tension Test-----The tension test shall be performed on 1% of the pipe from each lot.
3.Flattening Test----For pipe heat treated in a batch-type furnace,the flattening test shall be made on 5% of the pipe from each heat-treated lot.When heat treated by the continuous process or when treated condition is obtained directly by quenching after hot forming,this test shall be made on a sufficient number of pipe to constitute 5% of the lot but in no case less than two pipes.
delivery inspection
high quality
Price and market compatibility
Short production cycle
Technical specialty
Product Marking
1.In addition to the marking prescribed in Specufucation A999/A999M,the marking shall include the ANSI schedule number,the heat number or manufacturer's number by which the heat can be identified,the marking requirements of 5.2,and,if applicable,NH when hydrotesting is not performed and ET when eddy-current testing is performed,or UT when ultrasonic testing is performed.
2.If the pipe conforms to any of the supplementary requirements specified in S1 through S10,compliance shall be so indicated by adding the symbol''S'' directly followed by the number of the applicable supplementary requirement to the marking prescribed in 13.1.
FAQ
Q: How to Conduct Hydrostatic Test?
A: Each length of finished pipe shall be subjected to the hydrostatic test in accordance with Specification A999/A999M, unless specifically exempted under the provisions of 10.3 and 10.4.
Q: What are the corresponding UNS designations for TP304 and TP316?
A: TP304----S30400
TP316----S31600
Q: How to carry out the Standardization Procedure?
A: The test apparatus shall be standardized at the beginning and end of each series of pipes of the same size (NPS or diameter and schedule or wall thickness), grade and heat treatment condition, and at intervals not exceeding 4 h.More frequent standardization may be performed at the manufacturer's option or may be required upon agreement between the purchaser and the manufacturer.
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