ASTM D7127-17 PDF
Name in English:
St ASTM D7127-17
Name in Russian:
Ст ASTM D7127-17
Original standard ASTM D7127-17 in PDF full version. Additional info + preview on request
Full title and description
ASTM D7127-17 — Standard Test Method for Measurement of Surface Roughness of Abrasive Blast Cleaned Metal Surfaces Using a Portable Stylus Instrument. This test method specifies a shop or field procedure using a portable skidded or non‑skidded stylus profile tracing instrument to determine surface roughness characteristics (primarily Rt and peak count Rpc) of abrasive‑blast cleaned metal surfaces prepared for coating.
Abstract
This test method defines how to perform portable‑stylus profiling of blast‑cleaned steel to obtain profile height (Rt and related parameters) and peak density (Rpc) for use in coating specification and quality control. It gives recommended measurement ranges and refers users to complementary documents (for example SSPC guidance) for interpretation and acceptance criteria. The standard was published in 2017 and later withdrawn and replaced by D4417 (withdrawn in November 2021).
General information
- Status: Withdrawn (replaced by ASTM D4417 in November 2021).
- Publication date: 2017 (designation D7127-17; published in 2017). Some catalog records show January 12, 2017 as the publication entry for D7127-17.
- Publisher: ASTM International.
- ICS / categories: 25.220.10 — Surface preparation (surface treatment/paint preparation).
- Edition / version: D7127-17 (2017 revision).
- Number of pages: Generally listed as 5–6 pages in public catalogs (commonly shown as 6 pages).
Scope
This method provides a shop or field procedure to determine roughness characteristics of surfaces prepared by abrasive blasting for painting or coating. The procedure employs a portable stylus profile tracing instrument (skidded or non‑skidded) and is intended primarily for profiling where Rt (or equivalent Rmax/Rz measures) lies approximately in the range 10 to 150 µm (0.4 to 6 mil) and where peak count Rpc is less than about 180 peaks/cm (450 peaks/in.). The standard also notes that additional parameters may be agreed between purchaser and seller and refers to SSPC guidance for conformance criteria.
Key topics and requirements
- Measurement method: portable skidded or non‑skidded stylus profile tracing instruments used in shop or field environments.
- Primary profile parameters: Rt (total profile height) and Rpc (peak count/peak density); optional/related measures include Rmax, Rz and other agreed parameters.
- Intended measurement range: Rt ≈ 10–150 µm (0.4–6 mil); Rpc typically < 180 peaks/cm (450 peaks/in).
- Application: field and shop quality control of blast profile prior to coating application; used to specify and verify surface texture for coating adhesion.
- Limitations: numerical profile results from different methods may not be directly comparable; the method does not cover all safety considerations.
Typical use and users
Used by coating specifiers, quality control inspectors, field technicians, and contractors to quantify blast‑cleaned surface texture for acceptance criteria, coating selection, and to support adhesion and performance assessments. It is applied in shipbuilding, pipeline, offshore, and industrial steel surface preparation contexts where portable field profiling is required.
Related standards
ASTM D4417 — Field Measurement of Surface Profile of Blast Cleaned Steel (replacement/alternative methods); SSPC‑PA 17 provides complementary guidance for profile conformance. Other surface‑profile and roughness standards and industry guidance documents may be used in conjunction with (or instead of) this method depending on application and contractual requirements.
Keywords
surface roughness, surface profile, abrasive blast cleaning, portable stylus instrument, Rt, Rpc, peak count, Rmax, Rz, coating preparation, blast profile measurement, surface preparation.
FAQ
Q: What is this standard?
A: ASTM D7127-17 is a test method that describes how to measure surface roughness (profile height and peak density) of blast‑cleaned metal surfaces using a portable stylus profiler.
Q: What does it cover?
A: It covers the field and shop procedure for tracing surface profiles with a portable stylus instrument to obtain Rt and Rpc (and related profile measures), indicates typical measurement ranges (about 10–150 µm Rt and Rpc < 180 peaks/cm), and provides guidance for use in coating acceptance and quality control.
Q: Who typically uses it?
A: Coating specifiers, inspectors, contractors, surface‑preparation technicians, and laboratory personnel performing field profiling and acceptance testing for protective coatings.
Q: Is it current or superseded?
A: D7127-17 was published in 2017 but was withdrawn in November 2021 and replaced by ASTM D4417 (users should refer to D4417 and current ASTM/industry guidance for up‑to‑date field measurement methods).
Q: Is it part of a series?
A: It is issued under ASTM’s D designation for paint and related coatings materials and applications and is associated with related surface‑profile and surface‑preparation test methods and guidance documents (for example D4417 and SSPC publications).
Q: What are the key keywords?
A: Rt, Rpc, surface roughness, surface profile, abrasive blast cleaning, portable stylus, peak count, Rmax, Rz, coating preparation.