Walt Stein is a metallurgist and technical writer with some fifteen years' experience in all of the major metal-manufacturing processes—except Extruding.
He worked as Procurement Engineer for Stolle Corporation and the KG&E Nuclear Power plant at Wolf Creek, and as Fabrication Engineer for Wisconsin Centrifugal.
Walt holds a bachelor's degree in Metallurgical Engineering from the Universities of Minnesota.
He also holds an AAS in NDT and a technical certificate in Welding, a CQA, CQE, GMS and a Six Sigma Green Belt.
He will discuss a ten-point procurement procedure he developed for the purchase of base metals.
These ten points can be reversed in order for cost-effective receipt-inspection criteria.
He will apply this procedure to the procurement of filler metals and atmospheres, and will end the night with a round-table discussion on how this procedure is based
on Lean Manufacturing and Six Sigma principles.
A procurement-engineering system is costly and not generally meant for a job shop. But if there are problems, the cost of a procurement-engineering system
may be less than its cost savings.
The RIS, Receiving Inspection Spec, is numbered in the least-cost most-confidence order.
For example:
Transportation gives the most confidence.
The cost is only that you witness its arrival.
Marking gives less confidence, and the cost is added to the transportation-inspection costs.
Packaging gives less confidence again, and this inspection cost is added to the marking-and transportation-inspection costs.
This may seem counterintuitive, so here is another look at the confidence levels for receiving inspection:
---Percent Confidence---
Paragraph
Activity
Given
Remaining
Total
10.0
Transportation
90
10
90
9.0
Marking
90
1
99
8.0
Packaging
90
0.1
99.9
7.0
Test Reports
90
0.01
99.99
6.0
Surface Finish
90
0.001
99.999
5.0
Dimensions
90
0.0001
99.9999
4.0
Material Properties
90
0.00001
99.99999
Notice that the time and cost go up as the confidence level increases, but exponentially so with diminishing increases in confidence.
Thus, it makes no sense to put materials testing before marking inspection.
The confidence you have with your vendor, by experience and audits, can affect the confidence levels.
When receipt-inspecting the material, going from last in order of the MPS costs the least and gives the most confidence.
Here are the MPS and RIS paragraph orders side by side:
A109-00 Specification for Steel, Strip, Carbon, Cold-Rolled
A700-99 Standard Practices for Packaging, Marking, and Loading Methods for Steel Products for Domestic Shipment
E29-02 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E350-95 Standard Test Methods for Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought Iron
2.2 Other Documentation
2.3 WWMC Drawings and Documents
Drawing WWMC (Welded Widget Manufacturing Co.) 1234 Rev. 1 details the requirements of welded widget, P/N 1234.
2.4 Customer Drawings and Specifications
N/A
3.0 DEFINITION OF TERMS
Chemical Analysis
COMB or high-temperature Combustion - the most accurate and cost effective method of C, N, O and S quantitative analysis.
Machined chips are put into a crucible and melted, and C, N, O and S gases given off during melting are analyzed.
XRS or X-ray Spectrometry - the most accurate and cost effective method for major and minor elemental quantitative analysis in stainless steel.
The flat ground specimen is bombarded by an X-ray source. X-rays of wavelength characteristic of each element are collected and analyzed.
Heat analysis - chemical analysis of a solidified slug taken from the ladle or furnace of molten steel.
During the melt, it is common practice to make several heat analyses as charges are added and the melt chemistry is brought in to spec.
Product Analysis - chemical analysis of the finished product as opposed to the heat analysis.
COC - Certificate of Conformance
CMTR – the Certified Material Test Report is issued with material by anyone who tests it.
Chemical analyses and mechanical tests of specific heat and coil numbers are commonly listed on the CMTR and certified by the lab manager.
A second-hand CMTR, such as is provided by a service center when the mill CMTR is only transcribed, carries less weight than the mill CMTR.
MPS – Material Procurement Spec. Goes to the vendor(s).
Minor alloying elements - < 10% by weight as opposed to major alloying elements which are > 10% by weight.
Residual or Tramp Element - element that "resides" is the alloy by chance and neither improves or decreases pertinent properties
as long as a specified level is maintained.
RIS – Receiving Inspection Spec. Based on reverse order of the MPS.
RITR - The Receipt Inspection Test Report is received either from an outside testing lab or is generated
by the Metrology Lab both in part or in whole. The RITR assures that the material ordered is the material received.
Until referee testing is performed, as in the case of discrepant material, the RITR carries the same weight as the CMTR.
Strip - for cold-rolled material, strip is designated as < 24" wide. Sheet is wider.
Widget - part of a gadget assembly.
4.0 MATERIAL
4.1 Material Chemistry
4.1.1 Chemical Requirements
By heat analysis the chemistry, by weight percent, shall be:
Table 4.1.1
C
Mn
P
S
Cu
Ni
Cr
Mo
Material
max.
max.
max.
max.
max.
max.
max.
max.
1025
0.25
0.90
0.025
0.025
0.20
0.20
0.15
0.06
4.1.2 Material Characterization
The product analysis shall be performed using the following methods:
Mechanical properties shall be determined by a bend test made in the rolling direction.
For Number 2 temper, half-hard, the bend shall be 90 degrees around a radius equal to that of the thickness.
4.2.2 Test Specimen Dimensions
The bend-test specimen shall be long enough to make a full-radius bend.
4.2.3 Test Frequency and Location
The bend-test frequency shall be once per master coil.
4.2.4 Retests
If the bend test is out of spec., two retests shall be made and results averaged. If the retest results are again out of spec., the coil shall be rejected.
5.0 MATERIAL DIMENSIONS
5.1 Raw Material Dimensions
The CMTR shall identify the chemical analysis and mechanical properties pertaining to each coil tested. The CMTR must be an original or a copy of the rolling mill original.
The significant figures shall be the same as for each of those stated in Tables 4.1.1 and 4.2.1 of this specification.
8.0 PACKAGING AND STORAGE
The packaging and storage environment shall be such that the material does not corrode or age.
8.1 Packaging
The packaging shall be as shown in ASTM A700-99:
8.1.1 Figure 92 for Coils.
8.1.1.1 Coil Orientation
Prime side protective coating side out. Unwind clockwise looking down on the skid. Coils shall be vertically spaced one inch minimum with a minimum of three fiber boards. Paper interleaving: The paper interleaving shall not protrude outside of the coil wraps.
9.0 MARKING
9.1 Coil Marking
Each coil shall be marked with:
9.1.1 Mill name, service center name
9.1.2 Welded Widget Manufacturing MPS number, width and surface finish
9.1.3 Skid net weight
9.1.4 Mill heat number, mill coil-cut number
9.1.5 Welded Widget Manufacturing name
10.0 SHIPPING
10.1 Material Destination
Coils shall be shipped to the Welded Widget Manufacturing Company:
Welded Widget Manufacturing Company
1234 Fifth Street
Chicago, IL 60606
Fax: 312-456-7891
10.2 Documentation Destinations
10.2.1 Test Reports
Test Reports shall be mailed to Plant 0, at the address listed in 10.1, Attention: Incoming Materials Quality Supervisor.
10.2.2 Invoicing
Invoicing shall be mailed to Plant 2, Attention: Accounts Payable at:
Coils shall be shipped to the Welded Widget Manufacturing Company:
Welded Widget Manufacturing Company
1234 Fifth Street
Chicago, IL 60606
Fax: 312-456-7891
10.2 Documentation Destinations
10.2.1 Test Reports
Test Reports shall be mailed to Plant 0, at the address listed in 10.1, Attention: Incoming Materials Quality Supervisor.
10.2.2 Invoicing
Invoicing shall be mailed to Plant 2, Attention: Accounts Payable at:
Welded Widget Manufacturing Company
501 Twelfth Avenue
Chicago, IL 60606
Fax: 312-456-3456
9.0 MARKING
9.1 Coil Marking
Each coil shall be marked with:
9.1.1 Mill name, service center name
9.1.2 Welded Widget Manufacturing MPS number, width and surface finish
9.1.3 Skid net weight
9.1.4 Mill heat number, mill coil-cut number
9.1.5 Welded Widget Manufacturing name
8.0 PACKAGING AND STORAGE
The packaging and storage environment shall be such that the material does not corrode or age.
8.1 Packaging
The packaging shall be as shown in ASTM A700-99:
8.1.1 Figure 92 for Coils.
8.1.1.1 Coil Orientation
Prime side protective coating side out. Unwind clockwise looking down on the skid. Coils shall be vertically spaced one inch minimum with a minimum of three fiber boards. Paper interleaving: The paper interleaving shall not protrude outside of the coil wraps.
7.0 TEST REPORTS
7.1 CMTR
Each CMTR shall identify the chemical analysis and mechanical properties pertaining to each coil tested. The CMTR must be an original or a copy of the rolling mill original.
The significant figures shall be the same as for each of those stated in Tables 4.1.1 and 4.2.1 of this specification.
5.0 MATERIAL DIMENSIONS
5.1 Raw Material Dimensions
5.1.7 Skid Weight:
10,000# max.
5.1.6 Coil Weight:
5,000# max.
5.1.5 Coil OD:
42" min., 54" max.
5.1.4 Coil ID:
16" min., 20" max.
5.1.3 Length:
N/A
5.1.2 Width:
2.00 +/- 0.050
5.1.1 Thickness:
0.25 +/- 0.003
4.0 MATERIAL
4.2 Mechanical Properties
4.2.1 Property Requirements
Mechanical properties shall be determined by a bend test made in the rolling direction. For Number 2 temper, half-hard, the bend shall be 90 degrees around a radius equal to that of the thickness.
4.2.2 Test Specimen Dimensions
Bend-test specimen shall be long enough to make a full-radius bend.
4.2.3 Test Frequency and Location
The bend-test frequency shall be once per master coil.
4.2.4 Retests
If the bend test is out of spec., two retests shall be made and results averaged. If the retest results are again out of spec., the coil shall be rejected.
4.1 Material Chemistry
4.1.1 Chemical Requirements
By heat analysis the chemistry, by weight percent, shall be:
Table 4.1.1
C
Mn
P
S
Cu
Ni
Cr
Mo
Material
max.
max.
max.
max.
max.
max.
max.
max.
1025
0.25
0.90
0.025
0.025
0.20
0.20
0.15
0.06
4.1.2 Material Characterization
The product analysis shall be performed using the following methods:
Table 4.1.2-1
Element
Acceptable Methods
ASTM Standard
C, S
COMB
A353-93
Cr, Mn, Ni
XRS
E350-95
3.0 DEFINITION OF TERMS
Chemical Analysis
COMB or high-temperature Combustion - the most accurate and cost effective method of C, N, O and S quantitative analysis. Machined chips are put into a crucible and melted, and C, N, O and S gases given off during melting are analyzed.
XRS or X-ray Spectrometry - the most accurate and cost effective method for major and minor elemental quantitative analysis in stainless steel. The flat ground specimen is bombarded by an X-ray source. X-rays of wavelength characteristic of each element are collected and analyzed.
Heat analysis - chemical analysis of a solidified slug taken from the ladle or furnace of molten steel. During the melt, it is common practice to make several heat analyses as charges are added and the melt chemistry is brought in to spec.
Product Analysis - chemical analysis of the finished product as opposed to the heat analysis.
COC - Certificate of Conformance
CMTR – the Certified Material Test Report is issued with material by anyone who tests it. Chemical analyses and mechanical tests of specific heat and coil numbers are commonly listed on the CMTR and certified by the lab manager. A second-hand CMTR, such as is provided by a service center when the mill CMTR is only transcribed, carries less weight than the mill CMTR.
MPS – Material Procurement Spec. Goes to the vendor(s).
Minor alloying elements - < 10% by weight as opposed to major alloying elements which are > 10% by weight.
Residual or Tramp Element - element that "resides" is the alloy by chance and neither improves or decreases pertinent properties as long as a specified level is maintained.
RIS – Receiving Inspection Spec. Based on reverse order of the MPS.
RITR - The Receipt Inspection Test Report is received either from an outside testing lab or is generated by the Metrology Lab both in part or in whole. The RITR assures that the material ordered is the material received. Until referee testing is performed, as in the case of discrepant material, the RITR carries the same weight as the CMTR.
Strip - for cold-rolled material, strip is designated as < 24" wide. Sheet is wider.
E29-02 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E350-95 Standard Test Methods for Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought Iron
2.1.1.2 AWS Standards
A5.01-93 Filler Metal Procurement Guidelines
A5.18-01 Specification for Carbon Steel Electrodes and Rods for Gas Shielded Arc Welding
2.2 Other Documentation
N/A
2.3 WWMC Drawings and Documents
Drawing WWMC (Welded Widget Manufacturing Co.) 1234 Rev. 1 details the requirements of welded widget, P/N 1234.
2.4 Customer Drawings and Specifications
N/A
3.0 DEFINITION OF TERMS
Chemical Analysis
COMB or high-temperature Combustion - the most accurate and cost effective method of C, N, O and S quantitative analysis. Machined chips are put into a crucible and melted, and C, N, O and S gases given off during melting are analyzed.
XRS or X-ray Spectrometry - the most accurate and cost effective method for major and minor elemental quantitative analysis in stainless steel. The flat ground specimen is bombarded by an X-ray source. X-rays of wavelength characteristic of each element are collected and analyzed.
Heat analysis - chemical analysis of a solidified slug taken from the ladle or furnace of molten steel. During the melt, it is common practice to make several heat analyses as charges are added and the melt chemistry is brought in to spec.
Product Analysis - chemical analysis of the finished product as opposed to the heat analysis.
COC - Certificate of Conformance
CMTR – the Certified Material Test Report is issued with material by anyone who tests it. Chemical analyses and mechanical tests of specific heat and coil numbers are commonly listed on the CMTR and certified by the lab manager. A second-hand CMTR, such as is provided by a service center when the mill CMTR is only transcribed, carries less weight than the mill CMTR.
MPS – Material Procurement Spec. Goes to the vendor(s).
Minor alloying elements - < 10% by weight as opposed to major alloying elements which are > 10% by weight.
Residual or Tramp Element - element that "resides" is the alloy by chance and neither improves or decreases pertinent properties as long as a specified level is maintained.
RIS – Receiving Inspection Spec. Based on reverse order of the MPS.
RITR - The Receipt Inspection Test Report is received either from an outside testing lab or is generated
by the Metrology Lab both in part or in whole. The RITR assures that the material ordered is the material received. Until referee testing is performed,
as in the case of discrepant material, the RITR carries the same weight as the CMTR.
Strip - for cold-rolled material, strip is designated as < 24" wide. Sheet is wider.
Widget - part of a gadget assembly.
4.0 MATERIAL
4.1 Material Chemistry
4.1.1 Chemical Requirements
By heat analysis the chemistry, by weight percent, shall be:
Table 4.1.1
C
Mn
Si
P
S
Ni
Mo
V
Cu
Material
max.
max.
max.
max.
max.
max.
ER70S-6
0.06/
1.40/
0.80/
0.025
0.035
0.15
0.15
0.03
0.50
0.15
1.85
1.15
Per AWS 5.01-93 paragraph 6.4, the test frequency shall be level H, for each heat number and lot shipped.
4.1.2 Material Characterization
The product analysis shall be performed using the following methods:
Table 4.1.2-1
Element
Acceptable Methods
ASTM Standard
C, S
COMB
A353-93
Cr, Mn, Ni
XRS
E350-95
4.2 Mechanical Properties
N/A
5.0 MATERIAL DIMENSIONS
5.1 Raw Material Dimensions
5.1.1 Diameter:
0.045 +/- 0.001
5.1.2 Width:
N/A
5.1.3 Length:
N/A
5.1.4 Spool ID:
12"
5.1.5 Spool OD:
14
5.1.6 Spool Weight:
60# max.
5.1.7 Skid Weight:
10,000# max.
6.0 SURFACE QUALITY
6.1 Surface Appearance
Smooth, no rust
7.0 TEST REPORTS
7.1 CMTR
The CMTR shall identify the chemical analysis pertaining to each spool tested. The CMTR must be an original or a copy of the rolling mill original.
The significant figures shall be the same as for each of those stated in Tables 4.1.1 of this specification.
8.0 PACKAGING AND STORAGE
The packaging and storage environment shall be such that the material does not corrode or age.
8.1 Packaging
The packaging shall be suitable to ensure against damage during shipment and storage under normal conditions.
9.0 MARKING
9.1 Spool Marking
Each spool shall be marked with:
9.1.1 Mill name, service center name
9.1.2 Welded Widget Manufacturing MPS number, diameter and spool weight
9.1.3 Skid net weight
9.1.4 Mill heat number
9.1.5 Welded Widget Manufacturing Co. name
10.0 SHIPPING
10.1 Material Destination
Spools shall be shipped to the Welded Widget Manufacturing Company:
Welded Widget Manufacturing Company
1234 Fifth Street
Chicago, IL 60606
Fax: 312-456-7891
10.2 Documentation Destinations
10.2.1 Test Reports
The Test Reports shall be mailed to Plant 0, at the address listed in 10.1, Attention: Incoming Materials Quality Supervisor.
10.2.2 Invoicing
Invoicing shall be mailed to Plant 2, Attention: Accounts Payable at:
Spools shall be shipped to the Welded Widget Manufacturing Company:
Welded Widget Manufacturing Company
1234 Fifth Street
Chicago, IL 60606
Fax: 312-456-7891
10.2 Documentation Destinations
10.2.1 Test Reports
The Test Reports shall be mailed to Plant 0, at the address listed in 10.1, Attention: Incoming Materials Quality Supervisor.
10.2.2 Invoicing
Invoicing shall be mailed to Plant 2, Attention: Accounts Payable at:
Welded Widget Manufacturing Company
501 Twelfth Avenue
Chicago, IL 60606
Fax: 312-456-3456
9.0 MARKING
9.1 Spool Marking
Each spool shall be marked with:
9.1.1 Mill name, service center name
9.1.2 Welded Widget Manufacturing MPS number, diameter and spool weight
9.1.3 Skid net weight
9.1.4 Mill heat number
9.1.5 Welded Widget Manufacturing Co. name
8.0 PACKAGING AND STORAGE
The packaging and storage environment shall be such that the material does not corrode or age.
8.1 Packaging
The packaging shall be suitable to ensure against damage during shipment and storage under normal conditions.
7.0 TEST REPORTS
7.1 CMTR
The CMTR shall identify the chemical analysis pertaining to each spool tested. The CMTR must be an original or a copy of the rolling mill original.
The significant figures shall be the same as for each of those stated in Tables 4.1.1 of this specification.
6.0 SURFACE QUALITY
6.1 Surface Appearance
Smooth, no rust
5.0 MATERIAL DIMENSIONS
5.1 Raw Material Dimensions
5.1.1 Diameter:
0.045 +/- 0.001
5.1.2 Width:
N/A
5.1.3 Length:
N/A
5.1.4 Spool ID:
12"
5.1.5 Spool OD:
14
5.1.6 Spool Weight:
60# max.
5.1.7 Skid Weight:
10,000# max.
4.0 MATERIAL
4.1 Material Chemistry
4.1.1 Chemical Requirements
By heat analysis the chemistry, by weight percent, shall be:
Table 4.1.1
C
Mn
Si
P
S
Ni
Mo
V
Cu
Material
max.
max.
max.
max.
max.
max.
ER70S-6
0.06/
1.40/
0.80/
0.025
0.035
0.15
0.15
0.03
0.50
0.15
1.85
1.15
Per AWS 5.01-93 paragraph 6.4, the test frequency shall be level H, for each heat number and lot shipped.
4.1.2 Material Characterization
The product analysis shall be performed using the following methods:
Table 4.1.2-1
Element
Acceptable Methods
ASTM Standard
C, S
COMB
A353-93
Cr, Mn, Ni
XRS
E350-95
4.2 Mechanical Properties
N/A
3.0 DEFINITION OF TERMS
Chemical Analysis
COMB or high-temperature Combustion - the most accurate and cost effective method of C, N, O and S quantitative analysis. Machined chips are put into a crucible and melted, and C, N, O and S gases given off during melting are analyzed.
XRS or X-ray Spectrometry - the most accurate and cost effective method for major and minor elemental quantitative analysis in stainless steel. The flat ground specimen is bombarded by an X-ray source. X-rays of wavelength characteristic of each element are collected and analyzed.
Heat analysis - chemical analysis of a solidified slug taken from the ladle or furnace of molten steel. During the melt, it is common practice to make several heat analyses as charges are added and the melt chemistry is brought in to spec.
Product Analysis - chemical analysis of the finished product as opposed to the heat analysis.
COC - Certificate of Conformance
CMTR – the Certified Material Test Report is issued with material by anyone that tests it. Chemical analyses and mechanical tests of specific heat and coil numbers are commonly listed on the CMTR and certified by the lab manager. A second-hand CMTR, such as is provided by a service center when the mill CMTR is only transcribed, carries less weight than the mill CMTR.
MPS – Material Procurement Spec. Goes to the vendor(s).
Minor alloying elements - < 10% by weight as opposed to major alloying elements which are > 10% by weight.
Residual or Tramp Element - element that "resides" is the alloy by chance and neither improves or decreases pertinent properties as long as a specified level is maintained.
RIS – Receiving Inspection Spec. Based on reverse order of the MPS.
RITR - The Receipt Inspection Test Report is received either from an outside testing lab or is generated by the Metrology Lab both in part or in whole. The RITR assures that the material ordered is the material received. Until referee testing is performed, as in the case of discrepant material, the RITR carries the same weight as the CMTR.
Strip - for cold-rolled material, strip is designated as < 24" wide. Sheet is wider.
E29-02 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E260-96 E260-96 Standard Practice for Packed Column Gas Chromatography
2.1.1.2 AWS Standards
A5.32-97 Specification for Welding Shielding Gases
2.2 Other Documentation
N/A
2.3 WWMC Drawings and Documents
Drawing WWMC (Welded Widget Manufacturing Co.) 1234 Rev. 1
details the requirements of welded widget, P/N 1234.
2.4 Customer Drawings and Specifications
N/A
3.0 DEFINITION OF TERMS
COC - Certificate of Conformance
CMTR – the Certified Material Test Report is issued with material by anyone who tests it. Chemical analyses of manifolds and specific tanks are commonly listed on the CMTR and certified by the lab manager.
MPS – Material Procurement Spec. Goes to the vendor(s).
RIS – Receiving Inspection Spec. Based on reverse order of the MPS.
RITR - The Receipt Inspection Test Report is received either from an outside testing lab or is generated by the Metrology Lab both in part or in whole. The RITR assures that the material ordered is the material received. Until referee testing is performed, as in the case of discrepant material, the RITR carries the same weight as the CMTR.
Widget - part of a gadget assembly.
4.0 MATERIAL
4.1 Material Chemistry
4.1.1 Chemical Requirements
The chemical content shall be 75-25 Ar-CO2 by volume.
The moisture content shall be 32 ppm max.
The dew point shall be -620 F. max.
By manifold analysis the chemistry, by weight percent, shall be:
Table 4.1.1
Moisture
Dew
%
Purity
ppm
Point
Material
nominal
min.
max.
C0 max.
Ar
75
99.997
11
-59
CO2
25
99.8
32
-62
mixture
32
-62
4.1.2 Test Specimen Dimensions
N/A
4.1.3 Test Frequency and Location
The test frequency shall be once per manifold number.
4.1.4 Retests
Per AWS 5.32-97, paragraph 8, if the test is out of spec., two retests shall be made and both must pass. If the retest results are again out of spec., all the cylinders from the manifold group shall be rejected.
4.2 Mechanical Properties
N/A
5.0 CONTAINER DIMENSIONS
5.1 Tank size, Volume
5.1.1 Tank Size:
2200 #
5.1.2 Tank Volume:
281 ft3 min.
6.0 SURFACE QUALITY
N/A
7.0 TEST REPORTS
7.1 CMTR
The CMTR shall identify the chemical analysis pertaining to each manifold group tested. The CMTR must be an original or a copy of the gas wholesaler original.
The significant figures shall be the same as for each of those stated in Tables 4.1.1 of this specification.
8.0 PACKAGING AND STORAGE
The packaging and storage environment shall be such that the tanks do not corrode or age.
8.1 Packaging
The packaging shall be suitable to ensure against damage during shipment and storage under normal conditions:
9.0 MARKING
9.1 Tank Marking
Each tank shall be tagged with:
9.1.1 Filling center name, distributor center name
9.1.2 N/A
9.1.3 Tank-contents weight
9.1.4 N/A
9.1.5 N/A
10.0 SHIPPING
10.1 Material Destination
Spools shall be shipped to the Welded Widget Manufacturing Company:
Welded Widget Manufacturing Company
1234 Fifth Street
Chicago, IL 60606
Fax: 312-456-7891
10.2 Documentation Destinations
10.2.1 Test Reports
The Test Reports shall be mailed to Plant 0, at the address listed in 10.1, Attention: Incoming Materials Quality Supervisor.
10.2.2 Invoicing
Invoicing shall be mailed to Plant 2, Attention: Accounts Payable at:
Spools shall be shipped to the Welded Widget Manufacturing Company:
Welded Widget Manufacturing Company
1234 Fifth Street
Chicago, IL 60606
Fax: 312-456-7891
10.2 Documentation Destinations
10.2.1 Test Reports
The Test Reports shall be mailed to Plant 0, at the address listed in 10.1, Attention: Incoming Materials Quality Supervisor.
10.2.2 Invoicing
Invoicing shall be mailed to Plant 2, Attention: Accounts Payable at:
Welded Widget Manufacturing Company
501 Twelfth Avenue
Chicago, IL 60606
Fax: 312-456-3456
9.0 MARKING
9.1 Tank Marking
Each tank shall be tagged with:
9.1.1 Filling center name, distributor center name
9.1.2 N/A
9.1.3 Tank-contents weight
9.1.4 N/A
9.1.5 N/A
8.0 PACKAGING AND STORAGE
The packaging and storage environment shall be such that the tanks do not corrode or age.
8.1 Packaging
The packaging shall be suitable to ensure against damage during shipment and storage under normal conditions:
7.0 TEST REPORTS
7.1 CMTR
The CMTR shall identify the chemical analysis pertaining to each manifold group tested. The CMTR must be an original or a copy of the gas wholesaler original.
The significant figures shall be the same as for each of those stated in Tables 4.1.1 of this specification.
6.0 SURFACE QUALITY
N/A
5.0 CONTAINER DIMENSIONS
5.1 Tank size, Volume
5.1.1 Tank Size:
2200 #
5.1.2 Tank Volume:
281 ft3 min.
4.0 MATERIAL
4.2 Mechanical Properties
N/A
4.1 Material Chemistry
4.1.1 Chemical Requirements
The chemical content shall be 75-25 Ar-CO2 by volume.
The moisture content shall be 32 ppm max.
The dew point shall be -620 F. max.
By manifold analysis the chemistry, by weight percent, shall be:
Table 4.1.1
Moisture
Dew
%
Purity
ppm
Point
Material
nominal
min.
max.
C0 max.
Ar
75
99.997
11
-59
CO2
25
99.8
32
-62
mixture
32
-62
4.1.2 Test Specimen Dimensions
N/A
4.1.3 Test Frequency and Location
The test frequency shall be once per manifold number.
4.1.4 Retests
Per AWS 5.32-97, paragraph 8, if the test is out of spec., two retests shall be made and both must pass. If the retest results are again out of spec., all the cylinders from the manifold group shall be rejected.
3.0 DEFINITION OF TERMS
COC - Certificate of Conformance
CMTR – the Certified Material Test Report is issued with material by anyone who tests it. Chemical analyses of manifolds and specific tanks are commonly listed on the CMTR and certified by the lab manager.
MPS – Material Procurement Spec. Goes to the vendor(s).
RIS – Receiving Inspection Spec. Based on reverse order of the MPS.
RITR - The Receipt Inspection Test Report is received either from an outside testing lab or is generated by the Metrology Lab both in part or in whole. The RITR assures that the material ordered is the material received. Until referee testing is performed, as in the case of discrepant material, the RITR carries the same weight as the CMTR.
Background:
A rolling mill, in this case, may roll to the upper tolerance of the spec in order to sell more material. Rolling mills sell their material by the pound.
Underspecification – Allows all parties the freedom to accommodate to their own needs.
Example: A wide tolerance may allow a vendor to produce a raw product less expensively.
Problem: The purchaser of this material may want to save money by specifying to the lower end of the tolerance.
The tool and die maker may have requirements for the material to form adequately. The shop requirements ultimately dictate the extent of specification.
Overspecification – restricts certain parties in the quality of their work.
Same problem: A tight tolerance may cause the rolling mill to incur increased scrap rates, which the purchaser ends up paying for.
The tool and die maker may require tight tolerances for the job to run with minimal scrap.
Collaboration
Paragraph 11.0 Approval, or the Signature Block, is very important, especially in the underlying engineering report, the MPER. The best move a production shop can do is to spoil the people on the floor, to put them in luxury. The Signature Block could also include the fork-lift driver or crane operator, for he knows the capacities of his lifting vehicles and their relation to skid weights.
In a fab-shop environment, the welder is very important. Give him a long paid lunch hour, buy him lunch and have him read over and sign the MPER and MPS unless he has objections. While engineers may know things about welding that welders do not, welders know things about engineering that engineers do not. Ditto for other personnel. We all need to help each other out.
Collaboration is very important in the struggle between under- and over-specification.
The use of Economic Order Quantity is obvious. If the rolling mill can provide material of the quality and delivery times needed, then the rolling mill will give a volume discount.
In this case, eliminating the middleman service center keeps costs down and another set of hands out of the process.
Sometimes a middleman vendor can impart harmful qualities on material. If a material thickness spec cannot be met, sheet can be flat polished to bring it in spec. Extra transportation and handling costs drive the cost of the finished product up. Flat polishing can change material properties out of spec.
It costs less to pay a little more and leave the quality control in the hands of fewer vendors.
