Nguyễn Duy Biên

Bolting & gasket markings

ASME B16.20 - 2017 Gasket RJ

___Marking ASME B16.20 2017 - Section RJ-4 and Table RJ-4.

___Dimensional inspection: ASME B16.20 2017 - Section RJ-5 and Table RJ-5.

___Identification number: ASME B16.20 2017 - Section RJ-7 and Table RJ-5.

ASME B16.20 - 2017 Gasket SW

___Marking ASME B16.20 2017 - Section SW-4 and Table SW-4.1.

___Dimensional inspection: ASME B16.20 2017 - Section SW-2 and Table SW-2.1.

___Color coding: ASME B16.20 2017 - Section SW-4.3 and Table SW-3-1.

ASME SA-193/SA-193M - 2019

___Marking SA-193/SA-193M - Section 15 and ASME SA-962/SA-962M Section 20.3; 20.8.

ASME SA-194/SA-194M - 2019

___Marking SA-194/SA-194M - Section 13 and ASME SA-962/SA-962M Section 20.4; 20.8.

ASME SA-307 - 2019

___Marking SA-307 - Section 13.

ASME SA-325 - 2019

___Marking SA-325 - Section 15.

ASME SA-563 - 2019

___Marking SA-563 - Section 14.

ASME B16.11

Dimensional inspection: ASME B16.11 2016 - Section 6.
Tolerance: ASME B16.11 2016 - Section 7.

ASME B16.9 - Production Markings

(Carbon steel)

(Stainless Steel)

Dimensional inspection: ASME B16.9 2018 - Section 6 and Table 6.1.
Tolerance: ASME B16.9 2018 - Section 11 and Table 11-1.

ASME B16.5 - Production markings

Dimensional inspection: ASME B16.5 2017 - Section 6.

Tolerance: ASME B16.5 2017 - Section 7.

ASME A-516/A-516M Markings verification

ASME A-516/A-516M Markings verification

ASME SA-20/SA-20M-2019 - Production Marking - Section 13.

Plate shall be legibly marked with (eg.):

The specification number: SA-516.
The manufacturer's name or brand: BCK.
Grade: GR.70N.
Heat number: 3-5642.
Plate identifier: 111-1.
Heat treatment: MT.
Additional: length, client, dimension, LTV...

Eg. SA516 Grade 70 MT LTV Normalized:

MT = material heat treated, see Section 20 of SA-20 2019.
LTV = Supplementary S5 "Charpy V-Notch Impact Test", see Supplementary Requirement S5 of SA-516 2019.

Code marking

Code marking: Txxxx - Plate.
Die stamp may be stamped on the thickness with T>= 6mm for carbon steel and T>= 12 mm for stainless steel unless otherwise by supplementary requirements.

Dimensional and visual inspection

Dimension/masses: ASME SA-20/20M - 2019 Section 14.

Transfer markings
Guide to transfer markings information to the off-cut pieces:

Step 1: Verify MTC and original markings are matched, dimensional / visual inspection for each plate.
Step 2: Transfer the original markings to the off-cut pieces (unmarked cut pieces) by paint marker
Step 3: Stamp "processor's name or trademark, brand (for resale) on both pieces, see Section 13.4 of SA-20/SA-20M.
Step 4: Shot photo of the original markings and new transfer identification for preparing a report, photo report should minimum show all production markings, processor's identification, buyer name, date, signature, ... and attachment the MTC.
Step 5: Cut the plates into aspect size for resale by processor.

ASME A-106/A-106M Markings verification

ASME A-106/A-106M Markings verification

ASME SA-106/SA-106M-2019 - Production Marking - Section 25
ASME SA-530/SA-530M-2019 - production Marking - Section 24

Each length of pipe shall be legibly marked with (eg.)

The manufacturer's name or brand: BCK.
The specification number: ASME SA-106/SA-106M.
Grade: B.
Heat number: 3-35727.
ASME SA-106/SA-106M - Table 4: NDE/2500 PSI.
The length: 6000 MM.
The OD: NPS 3".
The Schedule: SCH XXS.
The weight: not applicable for NPS 3".
Supplementary: not applicable.

Note:

This material do not cover welded pipe, see Section 1.1 of ASME SA-106/SA-106B.
NPS 4" and larger shall marked weight class.
Production analysis shall be made on the representative two pipes from each lot, see Section 9.1 of ASME SA-106/SA-106M.

Dimensional and visual inspection

Forming/dimension/masses: ASME B36.10M - 2018; ASME SA-530/SA-530M - Table X1
Tolerance: ASMESA-530/SA-530M - Section 7, 8, 9, 10, 11, 12 - Table 1, 2, 3

Transfer markings, Guide to transfer markings information to a shorter length:

Step 1: Verify MTC and pipe section are matched, dimensional / visual inspection for each pipe.
Step 2: Transfer original markings to cut off length (unmarked cut length) by paint marker
Step 3: Stamp "processor's name or trademark, brand (for resale) on both pipe segment.
Step 4: Shot photo of the original markings and new transfer identification for preparing a report, photo report should minimum show all production markings, processor's identification, buyer name, date, signature, ... and attachment the MTC.
Step 5: Cut the shorter length for resale by processor.

Coded markings

Coded marking: Pxxxx - Pipe.
Die stamp may be stamped on the thickness with T>= 6mm for carbon steel and T>= 12 mm for stainless steel unless otherwise by supplementary requirements.
Piping process fabrication may not required die stamp on the off-cut length.

End beveling preparations

Accordance with the approved WPS.
ASME B16.25 2017 - Fig. 1 through Fig. 6.

Storage pipe material

Keep pipe material in dry area, keep away wet condition.
All end pipes shall be protected by plastic covers.

ITP - "H" Hold Point & "W" Witness Point

H và W là hai điểm quan trọng trong ITP (Inspection and Test Plan) bạn phải thông báo cho các bên để kiểm tra, chứng kiến trước khi chuyển sang bưới tiếp sau:

"H" - Hold Point
"W" - Witness Point

Điểm "H" sẽ yêu cầu cao hơn điểm "W" (để hiểu rõ thì đọc các định nghĩa trong ITP):

"H" - yêu cầu các bên phải xác nhận trước khi chuyển bước sau, trong trường hợp Khách hàng và đại diện không có mặt thì nhà sản xuất phải đợi để xác nhận.
"W" - yêu cầu các bên phải xác nhận, nhưng không nhất thiết phải dừng công việc.

Hai điểm trên, đối với tình hình đại dịch Khách hàng không tham gia chứng kiến thì sao?

Bạn có thể lựa chọn video call với điều kiện gửi thông báo (NOI) đúng lịch và xác nhận với Khách hàng.

Trường hợp điểm "W" nhưng khách hàng không tham gia được thì sao?

Cty phải kiểm tra đúng và xác nhận kết quả cho Khách hàng, không cần phải Holding đến khi khách hàng đến chứng kiến.

Do đó, lúc xây dựng ITP anh em nên lưu ý thật kỹ các điểm này. Nếu xem xét tình hình khó tham gia thì nên để W/H hoặc W/R (R-Review). Không nên đưa các điểm "H" quá nhiều.

Bạn nên đặt điểm "H" ở đâu?